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