Now drain 1 gallon of water from the bottom of the tank as quickly as you can and get an accurate temperature reading. Anthony Pacilla is a registered master plumber for McVehil Plumbing in Washington, Pennsylvania. The recommended fix is to disconnect everything from the module for an hour and let the power dissipated to “flush” out the memory. ... Sensor & Thermistor Parts Valve & Float Parts. No go. That chart requires exact numbers to get exact resistance readings. I first saw the LED flashed 7 times, which means “Gas Controller Valve Failure.” Doesn’t sound good. Which means, the choice is hot setting. Make sure the water heater is properly grounded and is operating at 115-120 volts. Trade Water Heater Controls APPLICATION The WT8840 Water Heater Control is designed for use in Standing Pilot applications using an immersion well for water temperature sensing. I tried disconnecting it for 30 minutes. The WV4460E is mounted on the outside of the water heater tank. … If the pilot is restricted, try removing it and clearing it with a stiff brush and/or compressed air. The temperature reading is very critical and detail is of the utmost importance. All models of WT8840 include an integrated NTC temperature sensor. Drain about 4 to 5 gallons of water out of the drain valve at the bottom of the water heater and throw it out. One of the most basic skills a plumber should have is repairing a tank-type water heater. It uses a “thermopile” technology that converts thermal energy into electrical energy. Sometimes, carbon deposits can build up on the pilot and eventually create a restriction. The Honeywell gas valve has a front, middle and back with temperature sensor and piezo ignitor connections in between. Install Control to Water Tank 1. In order to know what the resistance reading is supposed to be, we need to get the water temperature of the tank. When this happens, the gas valve closes, extinguishes the pilot light and your water heater stops heating water. This unit (Honeywell WT8840B1000) replaced my old WV8840B1042, which was throwing a "5 flash" code (Temperature sensor failure). Wow, so many people had the same problem dating back to 2013. 60 minutes: No go. I even flushed some of water out to get the sediments out as it’s a source of heat barrier that contributes to overheating. 3. Become a Facebook LearnByBlogging.com Fan. Free repair advice! Failure to comply with this could result in substantial property damage, severe personal injury or death. 3. View solutions. Five flashes every three seconds indicates an internal sensor failure. Rheem water heater troubleshooting allows you to find pressure relief valve to some common issues or indicates professional repair or replacement is needed. Install of an AO Smith gas water heater with a Honeywell control valve. Clean the burner, the burner assembly, the orifices, the burner ports, the air shutter (if it has one), feed line, venturi (if it has one), pilot assembly, etc. Comments on this site are submitted by users and are not endorsed by nor do they reflect the views or opinions of COLE Publishing, Inc. The WV8860Q Water Heater Control is designed for use in Standing Pilot applications using an immersion well for water temperature sensing. Set the thermostat or the device's controller slightly above the current room temperature. Write down the resistance reading. Along with straightforward management software, their products adapt well to your indoor climate demands. What else could it be? These temperature sensors are designed to offer stable and fast linear outputs. The Honeywell Aquastat is a controller designed for boiler water control in heating systems that are either oil or gas fired. I checked that AO Smith Gas Water heater in the laundry room right away. Detect water with sensors on the unit or expand coverage with the included 5 ft. water sensing cable. Press the "HOT WATER TEMPERATURE" button. Test System by Increasing the Temperature. The Aquastat uses an immersion system that has two switches controlling the high and low temperature limits on the heater. Ensure that the 3-wire lead from the well assembly Then I took a sheet of aluminum foil (an electricity conducting material) and touch all the various solder joints (silver-looking blobs) especially the big capacitors, which are the energy storage devices. plus one turn. Often blamed on sediment in the tank, the 4 flashes is one of the most common problems with the Press the green tick to save the changes. Other temperature settings, hot and very hot, each stands for 120 degrees and 160 degrees. There are two types of burners — steel and cast iron. I always had issues with the temperature, and the water was very hot, just learned to live with it. After a minute or so, the LED started blinking once and paused and blinking once again. I heard a scream from my wife in the shower, “No hot water! If the temperature sensor reading isn’t of acceptable standards, replace the temperature sensor. Don’t hit the reset switch and head out to your next call. If you get a continuity reading, then it is good. You just need to turn on the thermostat to the heat position. Clean everything. Honeywell WT8840A1000 - WT8840 Water Heater Gas Valve Control, NG - 1" Spud, 4" W.C. - WATER HEATER GAS VALVE, STANDING PILOT WITH PIEZO, SETPOINT 55-155F, SPUD LENGTH = 1", BRACKET= OFFSET, REGULATOR SETTING= 4" W.C., GAS TYPE=NATURAL GAS The WT8840 series is the Water Heater Control for trade use to replace WV8840 valves used in AO Smith and Bradford White Water Heaters. Restore power and then allow the water heater to run a system diagnostic. If the fault code reads that the gas control is locked out due to high tank temperature, you can test the temperature sensor to see if it is working. The water heater is a 40 Gallon Whirlpool N40T121-403. The Honeywell gas valve went into “High Temperature Shutdown” mode. I kept resetting the system without much success to get the gas burner to turn on again. The recommended fix is to disconnect everything from the module for an hour and let the power dissipated to “flush” out the memory. SKU: C7031D2003. Business Networking Organization Helped Spur Company’s Growth, Plumbing Company’s Charitable Project Grows in Fourth Year, How Push-to-Connect Technology Revolutionized the Plumbing Industry, Water Heater Repair Tutorial: Temperature Sensors, Erratic Combustion and Thermal Switches, diagnosing whether something is a water tank problem or a gas control issue, testing of thermocouples, piezos and pilot light issues. The author provides some more troubleshooting and repair tips in the final installment of this four-part series. Don’t think that if it says 82 degrees that 80 degrees is close enough. I left it disconnected for overnight. Check dial on combination thermostat/gas valve. I just saved $110 (Walmart’s price) for the module and enduring days of suffering through cold showers and complaints from my family members. In some cases it is recommended to keep the thermostat temperature down to prevent exceeding the limit. If all conditions are good and the water heater … If you have a Honeywell gas valve on your water heater, and you find you have no hot water, this may be the answer to your problem and the easy fix. Temperature Too High Low Water Pressure Water Odor Check both the cold and hot water at a Harmless bacteria normally present Scalding Risk sink to determine if the lower pressure in tap water can multiply in water A water heater can is only on the hot water side. He has 22 years of experience in the plumbing and HVAC trades, and has a bachelor’s in business and economics from Thiel College. Original unit had plastic water temp sensor, new one has metal temp sensor. See Fig. 2.Extremely cold water going into the heater will decrease the amount of hot water produced. 1. The water heater comes with a sophisticated, advanced Honeywell Water Heater thermostat/valve that provides continuous monitoring of the water temperature and turning on and off the gas accordingly – all without battery. Turn off electrical power at breaker. Join your colleagues who already get great content delivered right to their inbox. Now that you have the burner in your hand, look for and remove any loose soot buildup, especially in the burner ports. Locate the hot surface igniter and look for a spark or glow there. Most newer water heaters use Honeywell gas valves. 3 possible causes and potential solutions . A thermocouple or flame sensor is a device used to control gas flow in gas water heaters.On older-style heaters with standing pilot lights, the device is typically called a thermocouple, while on newer units with electronic ignition, the same (or virtually the same) device is called a flame sensor.For our purposes, we'll refer to both devices as the thermocouple. It may be necessary to temper incoming water supply. I first tried resetting the module by turning it to off and re-start the pilot light by turning the dial to “Pilot”, holding down “Pilot” and push the spark igniter. CS8840 pilot assemblies are Fire or Explosion Harzard. My Honeywell Water HeaterGas Valve Control is giving the 5 Flash Code "Sensor Failure". 5 replace gas valve this indicates a sensor failure and the gas control valve must be replaced. ... (Locating the Water Heater) continued- Water heater corrosion and component failure can be caused by the heating and breakdown of airborne chemical vapors. I googled around and came across this website by Tyler Tork. Based on the “Status Light Code,” it means “Temperature Exceeded.” It made sense as we had a heat wave recently. Turn the gas control knob OFF, turn the gas supply valve OFF, and click on "Need More Help" below. The system kept coming back with 4 flashes. So I figured the system should reset itself once the over temperature condition goes away. Hydrogen gas is extremely flammable and can ignite. Open a hot water faucet in the house and then turn the cold water supply on to the water heater and allow time for the tank to fill with water. In this final article, I’ll cover temperature sensors, erratic combustion and thermal switches. Modify the temperature using the "UP" or "DOWN" arrows depending on preferences. Do what you need to do to disassemble the valve but leave the sensor plugged into the back plate. 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