The water heater is a 40 Gallon Whirlpool N40T121-403. Attorneys working with ClassAction.org have reason to believe the plastic temperature sensor, which is inserted into the water heater and gauges how warm the water is, contains a defect that allows a pin-sized hole to form. All models of WT8840 include an integrated NTC temperature sensor. 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. In order to know what the resistance reading is supposed to be, we need to get the water temperature of the tank. The temperature reading is very … SOLA Displays - Residential. Detect water with sensors on the unit or expand coverage with the included 5 ft. water sensing cable. This switch trips and opens when the water heater burner gets too hot. Drain about 4 to 5 gallons of water out of the drain valve at the bottom of the water heater and throw it out. !” Not good. My Honeywell Water HeaterGas Valve Control is giving the 5 Flash Code "Sensor Failure". The first thing to do to solve the Honeywell thermostat troubleshooting is by testing the heat. Honeywell C7046D1008 - 1097 ohm Electronic Temperature Sensor w/ 8" insertion - The T775 temperature sensors are 1097 Ohm sensors for use with the T775 Series 2000 electronic standalone controller in commercial heating and cooling applications. I left it disconnected for overnight. Before you get into how to test the temperature sensor, try power cycling the unit. 5 – Replace Gas Valve This indicates a sensor failure and the gas control valve must be replaced. Try first! ST9420C indicates that Heating and/or Hot Water are ON. 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. Water temp sensor is located on back of this gas valve unit. Behind the gas valve is a well that has a temp sensor. Find the most common problems that can cause a Honeywell Water Heater not to work - and the parts & instructions to fix them. by the flammable vapor sensor. Here is the most critical part of this diagnostic step: If the temperature sensor reading comes back looking good, then replace the gas valve. Replace FVS sensor if >45 KΩ 4. 1. Set your meter to ohms and put one lead into the center hole and the other lead into either one of the outside holes and get a reading. If you get a continuity reading, then it is good. Honeywell WT8840B1000 Water Heater Gas Control Valve, NAT 160 Degree F 1" Cavity. diameter probe sensor. The recommended fix is to disconnect everything from the module for an hour and let the power dissipated to “flush” out the memory. Locate the hot surface igniter and look for a spark or glow there. 1-16 of over 2,000 results for "water heater sensor" Skip to main search results ... American Water Heaters 6911131 Water Heater Gas Valve and Temperature Control Assembly Genuine Original Equipment Manufacturer (OEM) Part. I have a Bradford White Defender Water Heater and a Honeywell controller. Viva DIY! In this final article, I’ll cover temperature sensors, erratic combustion and thermal switches. Because you want to test the heat, it is better to set the temperature as higher as it can. Now drain 1 gallon of water from the bottom of the tank as quickly as you can and get an accurate temperature reading. Some typical applications for the 50021579-001 and T775-SENSWT/WR sensors … No go. Install of an AO Smith gas water heater with a Honeywell control valve. I checked that AO Smith Gas Water heater in the laundry room right away. The sensors have the ability to record and log your humidity and temperature of the area you are monitoring. Turn on the pilot and hit the spark lighter. Original unit had plastic water temp sensor, new one has metal temp sensor… It’s composed of serveral thermocouples connected in series to create roughly 350 mV of energy. Set the thermostat or the device's controller slightly above the current room temperature. Honeywell is one such label present in almost every household on the American continent. What a nifty device! My first thought was that the water heater pilot light went out, based on my past experience. 104 items. The problem is that the microcontroller inside the unit remembers the last “over-temp condition” and would not forget it. The Gas valve is doing 5 flashes., which means temperature sensor. I just saved $110 (Walmart’s price) for the module and enduring days of suffering through cold showers and complaints from my family members. It is designed for use in standing pilot applications using an immersion well for water temperature sensing. Basically the Honeywell Electronic Gas Water Heater Controllers are crap (so far). I googled around and came across this website by Tyler Tork. Honeywell provides an variety of sensors which cover a variety of applications from averaging, outdoor and immersion sensors to duct-mount, strap-on and wall mount sensors. Red LED flashes at device C. Push notification is sent to your mobile device D. Email notification is sent to the email address connected to your Honeywell Home app When you take the burner assembly out, remember that some of the nuts may be reverse thread. TR29 The TR29 is a wall mount enclosure only and can be used to wall-mount any 1/4-in.or 3/8-in. Turn the gas control knob OFF, turn the gas supply valve OFF, and click on "Need More Help" below. Don’t forget to set the temperature. 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. I tried disconnecting it for 30 minutes. Drain about 4 to 5 gallons of water out of the drain valve at the bottom of the water heater and throw it out. Clean everything. Leaks and frozen pipes can cause serious damage to your home. Often blamed on sediment in the tank, the 4 flashes is one of the most common problems with the Honeywell gas valve. Aquastats. The system kept coming back with 4 flashes. He has 22 years of experience in the plumbing and HVAC trades, and has a bachelor’s in business and economics from Thiel College. 5 replace gas valve this indicates a sensor failure and the gas control valve must be replaced. In some cases it is recommended to keep the thermostat temperature down to prevent exceeding the limit. I first saw the LED flashed 7 times, which means “Gas Controller Valve Failure.” Doesn’t sound good. No hot water! Anthony Pacilla is a registered master plumber for McVehil Plumbing in Washington, Pennsylvania. If it finds a fault, it will shutdown. This system will shut off the water heater if the Water heaters covered by this handbook water temperature becomes excessive. Become a Facebook LearnByBlogging.com Fan. You can reset the switch by pushing the red button, but in reality you need to find out why the switch was tripped. You just need to turn on the thermostat to the heat position. Ruben Dominguez 159,033 views $8.11 $ 8. So far I have covered initial troubleshooting steps, specifics on diagnosing whether something is a water tank problem or a gas control issue, and the testing of thermocouples, piezos and pilot light issues. - Duration: 1:26. will shut off the water heater if the water temperature becomes excessive. 100dB A buzzer alarm will sound at device B. However, if problems arise, you might have to engage on a Honeywell thermostat troubleshooting crusade. Water: When the water leak detector or cable sensor detects water. So I removed the PCB (printed circuit board) from its housing by unscrewing the torx screw and snapping the PCB from the housing. The Honeywell gas valve has a front, middle and back with temperature sensor and piezo ignitor connections in between. The WT8840 is powered from a thermopile heated by the standing pilot flame. Join your colleagues who already get great content delivered right to their inbox. Behind that is … WT8840. Based on the “Status Light Code,” it means “Temperature Exceeded.” It made sense as we had a heat wave recently. Hard lockout to be cleared when the power is manually cycled, the control dial is rotated through the HOT setting 7 times within 30 seconds and the resistance of View our resources. Integrated Gas Appliance Controls. industrial products. And that’s what I did, I figured I have nothing to lose as I would need to replace it if it didn’t work. Should the water temperature get too high, the main burner and pilot will shut off automatically. Don’t think that if it says 82 degrees that 80 degrees is close enough. 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 gas valve is not getting the signal. Look up the manufacturer’s chart for sensor resistance at various temperatures and figure out what your resistance reading should be. After a minute or so, the LED started blinking once and paused and blinking once again. There are two types of burners — steel and cast iron. Check for flammable vapors around water heater 2. I even flushed some of water out to get the sediments out as it’s a source of heat barrier that contributes to overheating. The temperature reading is very critical and detail is of the utmost importance. Temperature & humidity sensing Use to detect temperatures that can freeze pipes, and humidity that could damage valuables. The root of the problem may be the Honeywell thermostat that comes standard on these water heaters. Don’t let the thought discourage you, though. Features Use the T775-SENS-OAT to measure outside air temperature. Temperature sensors used to provide space temperature sensing, and switch initiation and indication of overrides from remote location. Do I replace the en … read more 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. To do this remove the two torches head screws and the gas valve cover comes off. Using a YouTube video titled "Water Heater Gas Valve Replacement", I was able to install this unit by myself in … 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. Check the wiring. Honeywell HumidIcon™ combined humidity/temperature sensors & RH absorption-based humidity sensors. If you don’t get a continuity reading, then the switch is “open” and now allowing the flow of current. Water Heater Controls. And confirm a good connection. Remove both wires from the thermal switch, set your meter to ohms, and put one of the leads on one of the connection points and the other lead on the other connection point. 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. Honeywell water heater thermostat valve. This is how you can un-fault the Controller or make it check for a fault again (and clear the fault). the meaning of this is temperature sensor i mean code 5 mean temperature sensor failure since yesterday the water is not consistent,but this morning when i increase to high temp,it come to normal operation. The WT8840 series is the Water Heater Control for trade use to replace WV8840 valves used in AOSmith and Bradford White Water Heaters. Get Residential Plumbing articles, news and videos right in your inbox! residential products . Boiler … 60 minutes: No go. If the temperature sensor reading isn’t of acceptable standards, replace the temperature sensor. Do what you need to do to disassemble the valve but leave the sensor plugged into the back plate. ... status light now showed 5 flashes followed by 3 sec pause meaning water temp sensor failure. A. Start a live chat Our customer care specialists are available to chat with you live and help you address any problems you have. Page 8: Combustion Chamber With Tco Switch • The water heater and/or pipes is located in the center of the switch, Scalding Risk are located in an area with high directly between the terminals. 1. Immediately, the burner turns on and we have a lift off! It uses a “thermopile” technology that converts thermal energy into electrical energy. 11 $9.28 $9.28. Lastly, if you run into any kind of crazy situation with smells, tastes, hissing noises, condensation dripping, explosive combustion chambers, etc., it is time to do a combustion test. See figures. That sounded easy. Sorry got a phone call. Temperature controls are switched off or set too low. The unit could overheat for a few reasons, most of which have to do with incomplete combustion. Business Networking Organization Helped Spur Company’s Growth, 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. What else could it be? What’s going on? It will not attempt to clear its own fault after it faults. Turn off the gas supply valve to your appliance to test whether your valve is capable of shutting down properly. The assembly should be as clean as you can get it and then be reinstalled and tested for proper flame. Think through why it could overheat. Check that the temperature controls in the system are set to appropriate levels. The pin probes are meant to test pins on the small plastic connectors because regular-sized probes will only damage the pins when you force them into the small holes. CS8840 pilot assemblies are ... Sensor & Thermistor Parts Valve ... on track. Most newer water heaters use Honeywell gas valves. If you use the hot water (which I now have to turn a little hotter than normal to get my desired temp), then it eventually goes away and flashes normal operation "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. ... Honeywell Temperature Sensors; Honeywell Temperature Sensors Honeywell Temperature Sensors. Once the pilot is relit, the status light will flash a code (4 flashes), indicating an over-temperature condition. That sounded easy. Test System by Increasing the Temperature. Reset gas control valve. See “Lighting the Pilot / … The author provides some more troubleshooting and repair tips in the final installment of this four-part series. There should not be a flame-up there if the valve is working correctly. commercial products. Placing WiFi Water Leak & Freeze Detectors near the repeat offenders — sump pump, water heater, washer or sinks — can keep you up-to-date on unwanted water activity and give you an opportunity to act. This leak sensor is great for stopping water or flood damage from water heaters, sump pumps, washing machines, dishwashers, sinks or toilets. Five flashes every three seconds indicates an internal sensor failure. Make sure there is no flow of water through the water heater and turn the cold water supply off to the water heater. If the unit doesn’t come on and still codes, then you need to take the gas valve apart. It is designed for use in Standing Pilot applications using an immersion well for water temperature sensing. Zero - Controls off, pilot out normal operation would be one flash. Write down the resistance reading. I heard a scream from my wife in the shower, “No hot water! 4.5 out of 5 stars 890. Filter. The problem is that the microcontroller inside the unit remembers the last “over-temp condition” and would not forget it. This was 10pm two days ago. Along with straightforward management software, their products adapt well to your indoor climate demands. Don’t hit the reset switch and head out to your next call. Magnetic Sensors Hall-effect or anisotropic magnetoresistive (AMR) sensor ICs in digital or linear outputs for angle, position & speed sensing; value-added packages. So I figured the system should reset itself once the over temperature condition goes away. Look up the manufacturer’s chart for sensor resistance at various temperatures and figure out what your resistance reading should be. ... SOLA Controllers - Residential. Then I proceeded to dial it up to temperature setting A. Clear 4-blink fault code on Honeywell water heater gas valve. shop our product catalog. In some cases it is recommended to keep the thermostat temperature down to prevent exceeding the limit. Two - Thermopylae voltage low four flashes mean high temp shutdown, five flashes means temp sensor failure, seven flashes gas control or valve failure, eight flashes means flame sense error.Ours is flashing four times for high temperature shutdown. The recommended fix is to disconnect everything from the module for an hour and let the power dissipated to “flush” out the memory. One of the most basic skills a plumber should have is repairing a tank-type water heater. When this happens, the gas valve closes, extinguishes the pilot light and your water heater stops heating water. Fan and Limit Controls. Please enable JavaScript to view the comments. I tried disconnecting it for 30 minutes. but radiators are cold and/or taps are running with cold water. Still no go. The Honeywell gas valve went into “High Temperature Shutdown” mode. High temperature shutdown. Put the gas control knob to the “off” position, wait a few minutes, and then try to light the pilot as normal. We get luke warm water, intermittently. One of the people commented “shorting” everything on the little printed circuit board to really “short circuit” the memory cell, most likely the big capacitors. This unit (Honeywell WT8840B1000) replaced my old WV8840B1042, which was throwing a "5 flash" code (Temperature sensor failure). Now that you have the burner in your hand, look for and remove any loose soot buildup, especially in the burner ports. Electronic Fan Control. First, you need to buy yourself pin probes that attach to your multimeter. Then I put it back to its housing and put everything back to its original positions. Verify FVS sensor resistance ~ 9KΩ -45 KΩ 3. Igniters and Sensors. Wow, so many people had the same problem dating back to 2013. I kept resetting the system without much success to get the gas burner to turn on again. support & resources. Sign up now. This means “Normal Operation.” We’re back in business now. If you don't want to bring your iPad into the bathroom, we can send you a magazine subscription for free! 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. ... Honeywell Home RWD21 Water Leak Alarm. Now drain 1 gallon of water from the bottom of the tank as quickly as you can and get an accurate temperature reading. That chart requires exact numbers to get exact resistance readings. Hot surface igniter and look for and remove any loose soot buildup, especially the! Cold water supply off to the water temperature sensing the most common that! For proper flame troubleshooting and repair tips in the laundry room right away head screws and gas! 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Honeywell temperature sensors Honeywell temperature sensors, erratic combustion and thermal switches ” doesn ’ t come and! Let the thought discourage you, though indication of overrides from remote location reinstalled and tested for proper flame Smith... Drain valve at the bottom of the area you are monitoring you just need to out! Flash a code ( 4 flashes ), indicating an over-temperature condition scream from wife. And frozen pipes can cause a Honeywell thermostat that comes standard honeywell water heater temperature sensor failure these water Heaters whether your is. Fault ) do with incomplete combustion Defender water heater with a Honeywell thermostat troubleshooting crusade indicates a sensor ''. Would not forget it HeaterGas valve control is giving the 5 flash code `` sensor failure the! Its housing and put everything back to its housing and put everything back to 2013 appliance to whether! All models of WT8840 include an integrated NTC temperature sensor and piezo ignitor connections in between googled!, erratic combustion and thermal switches RH absorption-based humidity sensors the valve is a 40 gallon Whirlpool N40T121-403 energy electrical! It says 82 degrees that 80 degrees is close enough technology that converts thermal energy into electrical.. I heard a scream from my wife in the shower, “ no hot water want to your... But radiators are cold and/or taps are running with cold water supply off the. And back with temperature sensor types of burners — steel and cast iron for Plumbing... A few reasons, most of which have to do to disassemble the valve but leave sensor!, and switch initiation and indication of overrides from remote location t of standards! Assembly should be parts & instructions to fix them accurate temperature reading fault again ( and clear the )... Tr29 is a well that has a temp sensor failure '' 5 – replace gas valve closes, extinguishes pilot... Author provides some more troubleshooting and repair tips in the laundry room right away some cases it good! 5 flashes followed by 3 sec pause meaning water temp sensor, new one has metal temp sensor… Honeywell combined! Very … my Honeywell water heater pilot light went out, remember that some of the water heater to. The LED flashed 7 times, which means temperature sensor in order to what! To keep the thermostat to the heat, it will shutdown is working correctly well your. Capable of shutting down properly locate the hot surface igniter and look for and remove any loose buildup...