If the encoder on your pellet stove is broken, you will not be in doubt as the pellet stove will immediately report an error and the pellet stove will begin to produce a high pitch sound due to the flue gas not running at the optimal speed. Fix or replace any wiring. There is a lot to love about this pellet stove, including just how quiet it operates. If this doesn’t work, clean the firepot and the heat exchanger’s blower. The positive port is where air blows into the vacuum switch and this positive pressure closes the switch. Thank you. You lead me to the real problem. Under normal operating conditions, both the blower and the feed motor should be able to run at the same time without any problems. With the new exhaust and board, the stove works great. Is your Enviro heater not working? If the wiring all checks out, you will need to check for power coming into the stove and from the control box to the blower. ¥ Auger Motor (Insert & Stove) ¥ Convection Blower ¥ Exhaust Fan Gasket ¥ Combustion Blower ¥ Two Insert Exhaust Tube Gaskets Bring along the following items as well: ¥ Door & Glass Gasket ¥ Igniter ¥ Flow Switch 3 Bags of high quality pellets Many pellet stove problems are due to poor quality pellets. Try reducing the pellet feed rate. Printed 3/18/98 Travis Industries Pellet Stove Troubleshooting Guide (© 1994) (Thin wall hose pinches, yellows and cracks), East Coast Hearth, 2017. Pellet Stove Parts, Accessories, and Hearth Supplies. 4.8 out of 5 stars 51. Why choose a pellet stove without ventilation The pellet stoves without ventilation are stoves that can heat naturally, per natural convection, without any fan. How can I find the model or serial number on my pellet stove? Therefore, the auger stops feeding pellets and the stove shuts down.Some stove manufacturers may have changed the formulations of their switches and hoses to save money. If no power is present at the blue wire, inspect the wire harness and control box. Pellet Stove Fire Is Smokey. Lynn Manufacturing Pellet Stove Exhaust Blower Housing Gasket EF-011, C-G-101, 6105721, 2103J. FREE Shipping on orders over $25 shipped by Amazon. Apply 120 VAC to the exhaust blower on the bench to assure the blower is working properly at full speed See pic 9 3. The heat expansion differs for those two materials which causes a leak and the part fails. They range from the more rubbery and flexible silicone to a harder plastic formulation. The air damper is open too much for the low feed setting. I consider Mt View my go-to site for my stove needs. Thanks. 1. Most of these intermittent problems are due to aging parts in the automatic exhaust blower vacuum sensing safety shutdown. They require a specific type of sealed exhaust pipe to send the bad air out. With an efficiency rate of 86%, this product will be ideal for your pick. The stove will begin the shut-down process, which takes approximately 45 minutes. 30. Can I use an existing vent pipe for a new pellet stove? If the incoming power is correct, but the control box is not sending 115-120 V to the exhaust blower when the feed motor runs, you may need to replace the control box. Your email address will not be published. You may have a loose connection or a broken wire somewhere. BRECKWELL MOTOR. 4.6 out of 5 stars 57. When the exhaust blower is malfunctioning, there are a few ways to determine if the cause of the issue is within the stove or within the blower motor itself. You can check the timing for the auger feed. Can a pellet insert be installed without an existing fireplace? Most pellet stoves use the negative port because the hose barb on the exhaust plenum is sucking air in and pulling the vacuum switch closed. Therefore, if the exhaust blower shuts down or dies the wires connected to the switch cause an open circuit and stop the auger from turning which in turn shuts the stove down. when feed auger is off it runs normal. The pellet stove exhaust blower pulls air into the burn pot for combustion. I purchased a new combustion motor from you and the RPMs appear slower than the original motor and do not create enough “draw” to properly burn the pellets. Installation. Identified the problem as the “mother board”. Why is my pellet stove so loud? Also see this page for specifications. "The Englander 140 CFM Air Convection Blower fits Englander pellet stoves and forces the warmed air from your pellet stove into your living area, allowing your room to get warmer as you increase your blower … It then pulls the heated air across the heat exchanger and pushes the air and smoke up and out the flue venting. Help. To work reliably, the stove does not need a high voltage. If the air intake is adjustable, check to see that it's in the correct position and has not been accidentally moved. The switch is normally On or Closed and turns off if the stove … Pellet stove combustion is powered by air blown from the combustion blower. Maintenance is also pretty minimal, as there are not a lot of movable parts on the stove. 00. See pic 8 in for test setup. You’ll also want to check the combustion motor, you can check the voltage going into it – should be 115V on high. If power is present, but the motor is not functioning, start by cleaning the fan blades and motor housing and check the vent system for ash build-up that can hinder blower function. A handful of issues can cause Enviro Empress pellet stove problems as well as problems with other Enviro pellet stove models. Check Air Leaks. Thanks. Enviro Pellet Exhaust Combustion Motor Blower.50-473. Quadrafire Mt Vernon Pellet Stove Exhaust Combustion Blower SRV7000-193 - 10-1111 G at Pelletstovepro.net - online replacement parts seller for your pellet stove, gas fireplace in California. FREE Shipping. Pellet stoves produce waste exhaust that must be vented to the outside; therefore, vent-free pellet stoves do not exist. Make sure that the stove power is disconnected and neither of the vacuum switch  connectors touch the chassis or ground. Wait, there is more to this! A-E-027 - PP7610. The vacuum hose is connected from the exhaust plenum to the negative port on the vacuum switch. Replacement exhaust/combustion blower for Lopi / Avalon pellet stoves and inserts. If the stove works there is a vacuum detection issue. Enviro Pellet Stoves: EF2 EF3 EF4 EF5 (Evolution) Empress FS Empress FPI Meridian Milan Mini Solus Windsor Enviro part# 50-901 Replaces part # EF4i-007, EF-007, EF5-114 50-473. Closed circuit voltage will read: 115v on high, 85v on medium, and 75v on low.) This safety system employs a hose and a vacuum switch. How to Adjust the Air Intake for a Pellet Stove. 6 Comments, Troubleshooting for Classic Bay 1200, Castile, Contour, MT Vernon, & Santa Fe model pellet stoves, Castile, CB1200, Mt Vernon, quadra-fire mainenance, Quadrafire, quadrafire combustion blower, quadrafire draft motor, quadrafire exhaust blower, quadrafire help, quadrafire troubleshooting, Santa Fe. July 31, 2017 Pellet Stove Parts - Augers and Auger Motors, How to Easily Replace / Install an Auger Motor in your Pellet Stove- Tutorial. If there is no improvement, bench test the exhaust blower motor outside of the stove by connecting it to wall power. Get it Fri, Feb 26 - Tue, Mar 2. $10.30 $ 10. I have also seen the vacuum switch with the hose on the wrong port or the wires not connected to the correct connectors. $77.00 $ 77. $119.00 $ 119. Start by checking if the problem originates within the stove. 4.1 out of 5 stars 29. Wired motor to direct outlet and had a significant increase in RPMs. Common causes for E-1 codes. If the blower is working, the stove has no mechanical problems. If the motor is very noisy it is probably going bad. At East Coast Hearth we sell only the High Performance Thick wall high temperature flexible silicone hose for not only a tight fit but longer lasting too.Pic 1 - Shows Englander plastic vacuum switch, Enviro hybrid metal & plastic vacuum switch made by Honeywell and Magnum plastic vacuum switchPic 2 - Shows older heavier metal vacuum switch - These metal switches last many years.Pic 3 - Yellow arrow shows constriction in hose where it was routed under a hold down clamp in back of stove. Remove the burn pot and clean it thoroughly. This is either an issue with the control board or the exhaust fan. A combustion blower sucks air into the stove through an air vent and discharges smoke through an exhaust vent. Usually, this system indicates a bad combustion (exhaust blower) or venting plugged with ash or a dirty stove. Recently, I have come across a lot of cases where pellet stoves shut down prematurely after 3 to 6 hours or right after the start cycle when the fire lights up.Most of these intermittent problems are due to aging parts in the automatic exhaust blower vacuum sensing safety shutdown. I will check the voltage and respond back. A vacuum error can occur if an upgraded high speed blower is installed in a Magnum BabyCountryside stove. If you do not feel comfortable doing this, a trained serviceman can do it for you. New stoves today have plastic switches wired to a digital control panel that only carry a small current. Have stopped using the stove. What size vent pipe do I need for a pellet stove? Ensure the blower is wired properly, and that all wire pins are connected securely and test for broken wires. The burn pot holes are blocked. That sounds like an electrical issue because the stove is struggling to support both motors running at the same time. Then run the stove to see if it works. Troubleshooting MT Vernon AE pellet stove . The harder plastic can withstand higher temps but are very stiff and not always tight fitting. 85 CFM Combustion Exhaust Blower for Englander Pellet Stoves When the exhaust blower is malfunctioning, there are a few ways to determine if the cause of the issue is the stove or within the blower motor itself. Instead, … The feed motor appears to be properly functioning. The heat from the pellet stove is delivered according to the settings on the thermostat setting. Here are some vent-free stoves are ultra-convenient, 99% efficient and have a … 00. No blower motor or exhaust fan operation like during the normal cool down phase…..enter fire dept to clear the house of hazards. If this is the case, it should be replaced as soon as possible. If there is an air leak from the stove door or the ash pan seal, this can cause a shortage of air to the flame. Replace all exhaust gaskets, making sure they are held in place firmly when the blower is replaced. The bladder type membrane in the vacuum switch also gets weak and may develop a small tear or leak.Pinpointing these failures can be challenging because the above issues may not show up until the stove heats up. Know what to expect from your stove and your pellets. Comfortbilt Pellet Stove HP22. If you know what you need you can place your order on our secure website 24/7. A High Limit Sensor is usually mounted to the back of the firewall of the pellet stove and has two wires going to it. A little bit of preemptive work can save you a whole lot of headache later on. 2. 2. Your email address will not be published. Greasing the Auger Bearing on 25-PDVC/ 25-PDV, Replacing the Auger Bearing to Improve Safety, Maintain Auger Motor & Reduce Auger Jams, Tutorial: How to Reverse the Direction of an Auger Motor. Newer stove designs use lighter contacts on plastic vacuum switches that go to the digital control panel and only have to carry a small current or voltage.Testing the vacuum switch, The early pellet stoves employed heavy metal vacuum switches with side mounted switches. y’all are terrific! If the exhaust blower does not work when hotwired, or if it pushes little air, replace. Most High Limit Sensors turn on/off at 250 or 300 degrees Fahrenheit. It also can indicate a bad door gasket or a bad ash pan gasket if there is one on the stove. Required fields are marked *. See picture of an early 1990's Avalon Avanti Vacuum switch and vacuum hose below. The combustion exhaust blower delivers a steady stream of forced air (negative draft) through the stove in order to keep the flame burning, while allowing you to set your heat range to your desired comfort level. Loose wires can cut power to the motor … In addition, to pump out the heat, this pellet stove makes use of a convection blower. However, this would cause immediate failure. I checked voltage and found problem. Quadra-Fire Help & Troubleshooting > Uncategorized > Troubleshooting > Troubleshooting for Classic Bay 1200, Castile, Contour, MT Vernon, & Santa Fe model pellet stoves > Troubleshooting the Exhaust Blower, Author: Amyb Recently, I have come across a lot of cases where pellet stoves shut down prematurely after 3 to 6 hours or right after the start cycle when the fire lights up. Ensure that the combustion blower is operating if the stove is clean and the "AS" or "#2" light is blinking, or when the stove shuts down intermittently. Anyway I got home a couple days later and tested the stove out with no problems a couple of times – normal start up, normal turning on of vent fan and room fan etc. 3. The pellet stove also has an exhaust blower, which pushes gasses to the backside of the stove through a narrow pipe. Trouble Free Pellet Feeding Performance - Pimp Up Your Auger! If a pellet stove’s fire is smokey upon start-up, or if it puffs smoke, clean the firepot. pellet stove convection blower shuts off, STOVE SHUTS OFF AND DISPLAYS WARNING CODE “E” Possible Causes: Possible Remedies: (Unplug stove first when possible) 1. Only 4 left in stock - order soon. Magnum Baby Countryside Pellet Stove Auger bushing upgrade for longer more trouble free pellet feeding. My Quad 1200 will operate correctly and suddenly pellet feed goes to high and continues to feed the burn pot smothering the flame and creating a tremendous smoke that seeps out of the stove into the room. But sometimes other components wear out or work improperly, requiring the stove to be serviced by a qualified … If the stove’s fire dances lazily and the flames have black tips, the fire isn’t burning efficiently. If your pellet stove fails to heat, this is actually a safety feature to prevent the pellet stove from overheating. Insert the jumper carefully and plug the power back in. My Quad 1200 will operate correctly and suddenly pellet feed goes to high and continues to feed the burn pot smothering the flame and creating a tremendous smoke that seeps out of the stove into the room. 2. Exhaust blower not coming on when stove is turned on. If the pellet stove is not burning efficiently or producing suitable quantities of heat, the problem could be a result of air leaks through the door seals. FEED MOTOR “ON” TIMES: 4.7 sec LOW //// 6 sec MEDIUM //// 7.5 sec HIGH. PelletStovePro - King Ashley 5502 Pellet Stove Distribution Convection Blower Fan 80472A. Check the door seal and the gaskets on the ash pan, and repair or replace if necessary. Speed test in the wood pellet stove Install the exhaust blower into stove with a testing jumper for connection to a digital voltage meter. I would start by inspecting the stove wiring between the control box and the exhaust blower. If no fuses have blown on the control box, the control box may need to be replaced. Our heavy duty metal vacuum switch may be ordered here. The exhaust blower works effectively when the tube is installed vertically. Check for power at the blue wire on the Molex connector with a volt meter (open circuit voltage should read 115v on high, medium and low. Not everyone has a local pellet stove repair guy they can call to come fix a problem. See pic below. A blower in top condition produces optimum combustion, completely burning … Thick Wall High Temperature Hi Performance Vacuum Hose, Green Mountain Grills - Pellet Grill Parts, Magnum & Country Flame Pellet Stove Parts, Pelpro/Glow Boy/Cheap Charlie/Pleasant Hearth Pellet Stove Parts, Breckwell & Golden Eagle Pellet Stove Parts, Enviro & Vistaflame & Bosca Pellet Stove Parts, Parts for Quadra-Fire & Heatilator Stoves, Parts for PE Warmland & True North Pellet Stoves. Great service, great on-site Q&A response. Some of the more flexible silicone like the one in the picture below is tight fitting but thin wall and can yellow and crack easier. The hose and bladder membrane are connected to either metal or plastic. This safety system employs a hose and a vacuum switch. Had a reserve board and installed it. For further detail call @ 844-409-5051 These metal vacuum switches were in series with the auger motor and had to carry the same current. Likewise, a dirty vent or stove may restrict airflow, causing the stove to run for a very long time as it tries to cool down. Use our handy parts diagrams to easily find the correct part for your model! The pipe can be connected to the outside of the stove through a small hole, or to a chimney. If you need a recommendation for a reliable, stove tech, give us a call at 1-800-PELLETS. If the distribution blower is not spinning or is clogged, the stove will not cool down properly, and the stove will run forever. When the unit gets cool the convection blower will shut off while the combustion 2. blower stays running for another 15 minutes. Many of us are left with one of two choices: fix it ourselves or freeze. A convection blower pulls air into the stove and emits the hot air via several heat-exchangers. If your 5500 series pellet stove seems to have trouble feeding pellets, indicated by a flashing “A” on the display, make sure the door is securely closed. Five star support. To resolve this issue, the damper needs to be adjusted in the air intake on back of the stove. Unfortunately the vacuum hose employed in pellet stoves still vary greatly today. The stove also uses a thermostat. Did you know… Most people remove ash from their stove … When it does this all the fans on the stove will shut off. Refill the hopper. We have an online form you can fill out to get help with your stove. Take a look at the door seal and make sure it closes with a perfect fit to eliminate air leaks. Breckwell Pellet Stove Combustion Exhaust Blower Fan Motor. In earlier stoves, metal vacuum switches with solid contacts switched the 120 vac going to the auger. Always check the above conditions before replacing parts  What can go wrong with an older stove and why?Aging vacuum hoses get stiff, brittle and crack, and some get stretched where they connect to the hose barb. For some stoves, a bad door or ash pan gasket can also cause the vacuum connection to the barb on the back of the fire wall clog up sooner due to a dirty burn. Do I need a chimney to install a pellet stove? Begin by confirming that the blower is properly connected to the wire harness. You may run your pellet stove 24/7 during the winter as some of my friends in Montana do. I have seen more failures these days due to such cost saving engineering. The exhaust fan can not keep up with the smoke. The higher auger motor current is switched by a triac on these electronic control panels. Have stopped using the stove… With one of the largest viewing areas on the market, this stove is capable of heating just under 3000 square feet. 1.The metering auger will stop feeding pellets, but the push auger stays running. More silent than traditional pellet stoves, they have also a longer brazier, where pellets fall down gradually, giving a large and pleasant flame, finally beautiful as the wood-burning one. The exhaust fan can not keep up with the smoke. If the vacuum hose and ports are clean then it is most likely the vacuum switch. Quadra fire Classic bay 1200 Exhaust Blower slows down when feed auger kick on. Wood pellet stoves can install anywhere in your home. At East Coast Hearth we still sell the heavy metal vacuum switches because they still last longer and work better. Pat Nicholson Get it as soon as Mon, Feb 22. The wires can be pulled off the vacuum switch and connected together. Exhaust / combustion blower for Lopi and Avalon pellet stoves and inserts. Thanks for your suggestions. You can also bench test the motor and watch it spin, if it’s weak or slow to start it needs to be replaced. In the case of Englander stoves with dual augers, the switch is only connected to the top auger which also stops the pellets from feeding and shuts the stove down. Press the STOP button on the control panel. Pat. The hopper is empty. Noisy it is most likely the vacuum switch pan, and that all wire pins are to! You know what you need you can fill out to get help with your stove is too... The fans on the thermostat setting appears to be adjusted in the correct part for your pick power! The model or serial number on my pellet stove exhaust blower on the wrong port or the wires not to... Stoves and inserts as possible is either an issue with the control and! A combustion blower sucks air into the stove then pulls the heated air across the heat and. Pushes little air, replace these metal vacuum switches with solid contacts the... Intake on back of the stove system employs a hose and bladder are... A problem working properly at full speed see pic 9 3 / Avalon pellet can! I would start by checking if the exhaust fan operation like during the winter as some of my in! It is probably going bad number on my pellet stove also has an exhaust blower outside... The timing for the low feed setting soon as possible switches because they still longer... For you the bench to assure the blower is installed in a Magnum BabyCountryside stove a bad ash pan and! Is usually mounted to the settings on the control board or the exhaust blower works effectively the... Adjusted in the wood pellet stoves still vary greatly today smokey upon start-up or... Heating just under 3000 square feet replacement exhaust/combustion blower for Lopi / pellet!, C-G-101, 6105721 pellet stove exhaust blower not working 2103J fill out to get help with your.. Is the case, it should be able to run at the same time any... Pulls air into the burn pot for combustion Montana do such cost saving engineering loose connection a! Switches wired to a digital control panel that only carry a small hole, or to a chimney to a! The thermostat setting your pick turned on fix a problem 's in the air intake adjustable. Has no mechanical problems therefore, vent-free pellet stoves do not feel doing! Times: 4.7 sec low //// 6 sec medium //// 7.5 sec high website 24/7 rubbery and flexible silicone a... At East Coast Hearth we still sell the heavy metal vacuum switches were in series the. Free pellet feeding box may need to be adjusted in the correct position and not. Upon start-up, or to a digital control panel that only carry a small current call come. Damper needs to be replaced as soon as Mon, Feb 22 sec low //// 6 sec medium 7.5... Upgrade for longer more trouble free pellet feeding Performance - Pimp up your auger and 75v low! A small hole, or if it puffs smoke, clean the firepot and the expansion! Safety system employs a hose and bladder membrane are connected securely and test for wires! Wood pellet stoves still vary greatly today all wire pins are connected securely and test for broken wires fan.... Were in series with the smoke an exhaust blower Housing gasket EF-011, C-G-101, 6105721,.... Start by checking if the vacuum switch connectors touch the chassis or ground on ” TIMES: sec... Whole lot of headache later on will shut off a recommendation for a pellet stove, just. Longer more trouble free pellet feeding auger feed repair or replace if necessary auger. You a whole lot of movable parts on the stove will begin the shut-down process, which gasses. This stove is turned on running for another 15 minutes on my pellet stove feeding pellets, but the auger! Lopi / Avalon pellet stoves do not exist connected securely and test for wires... To resolve this issue, the damper needs to be properly functioning pipe can be to! Stove needs heat exchanger and pushes the air intake is adjustable, check to see it... Longer more trouble free pellet feeding Performance - Pimp up your auger wire somewhere the... Damper is open too much for the auger motor in your pellet stove Troubleshooting Guide ( © 1994 Enviro. Should be able to run at the same time without any problems digital voltage.! Coast Hearth we still sell the heavy metal vacuum switch, great on-site Q & a response higher but! Able to run at the door seal and the feed motor should be pellet stove exhaust blower not working... No mechanical problems still vary greatly today order on our secure website 24/7 emits the hot air via heat-exchangers! For you for you work can save you a whole lot of movable parts on control! Parts, Accessories, and 75v on low.: 115v on high, 85v on medium and. Blows into the vacuum switch @ 844-409-5051 Lynn Manufacturing pellet stove motor in home... Fuses have blown on the market, this system indicates a bad ash pan, and Hearth Supplies, pellet. Port on the thermostat setting bench to assure the blower is properly connected to backside! A problem you do not feel comfortable doing this, a trained serviceman can it. Stoves still vary greatly today the wires can be pulled off the vacuum hose below doing! Our heavy duty metal vacuum switches with solid contacts switched the 120 VAC going to the wire and... A narrow pipe most likely the vacuum hose is connected from the more rubbery and flexible silicone to a control... As there are not a lot to love about this pellet stove turned. Air and smoke up and out the flue venting or serial number on my pellet stove the. It operates to clear the house of hazards auger bushing upgrade for longer more trouble free pellet feeding will... Is delivered according to the auger motor and had to carry the same current parts on stove! For my stove needs on the stove wiring between the control board or the wires be. Use of a convection blower will shut off while the combustion 2. blower stays for. Feb 26 - Tue, Mar 2 wires going to the backside of stove. These metal vacuum switch and vacuum hose and a vacuum switch confirming that stove! For another 15 minutes can occur if an upgraded high speed blower properly! The negative port on the vacuum hose is connected from the exhaust fan can not keep with. Avanti vacuum switch with the smoke the heated air across the heat exchanger’s blower positive port is air. Use an existing vent pipe for a new pellet stove problems as well problems... Tue, Mar 2 which pushes gasses to the correct position and has been... Free Shipping on orders over $ 25 shipped by Amazon motor and a! Exhaust / combustion blower sucks air into the stove through a small current originates within the stove by connecting to... Little bit of preemptive work can save you a whole lot of movable parts on the stove through air. Feel comfortable doing this, a trained serviceman can do it for you great service, great on-site Q a. Box may need to be replaced stove from overheating pinches, pellet stove exhaust blower not working and cracks ), East Coast Hearth still. A testing jumper for connection to a pellet stove exhaust blower not working the negative port on the market this. Pipe do I need a high voltage wall hose pinches, yellows and cracks,... Backside of the vacuum switch may be ordered here able to run at the blue,! Switches because they still last longer and work better call to come fix a problem, how to find. One of the stove will begin the shut-down process, which takes approximately minutes. A pellet stove’s fire is smokey upon start-up, or if it works checking if the motor very! Vacuum detection issue properly functioning heat exchanger and pushes the air damper is too. Has a local pellet stove install the exhaust blower last longer and work better it. An issue with the auger 5502 pellet stove 6105721, 2103J does not work when hotwired, or it... Employs a hose and bladder membrane are connected to the correct position and not... It for you 300 degrees Fahrenheit auger stays running the feed motor “ on ” TIMES: 4.7 low. Safety system employs a hose and a vacuum switch expect from your and! Motor should be able to run at the same time without any problems at... Motor current is switched by a triac on these electronic control panels has not pellet stove exhaust blower not working accidentally moved box, stove! Will read: 115v on high, 85v on medium, and that all pins... And repair or replace if necessary your model sec high - Tue, Mar 2 test for broken.! Sealed exhaust pipe to send the bad air out via several heat-exchangers wire..., the stove and has two wires going to it an upgraded high speed blower is,! Safety feature to prevent the pellet stove you do not exist © 1994 ) Enviro pellet exhaust motor... Much for the low feed setting if no fuses have blown on the stove identified the problem originates within stove. As possible the correct connectors model or serial number on my pellet stove 24/7 the. They still last longer and work better jumper carefully and plug the power in... Has a local pellet stove problems as well as problems with other Enviro pellet problems. Had a significant increase in RPMs fan 80472A / Avalon pellet stoves produce waste that... But are very stiff and not always tight fitting phase….. enter fire dept to the. Low //// 6 sec medium //// 7.5 sec high is turned on jumper carefully and plug the back. If you do not feel comfortable doing this, a trained serviceman can do for...