# MI5036FBN) wasn't giving hot water, pilot light wouldn't stay lit and water was leaking from bottom of gas valve (this part). It lights easily, but won’t stay lit. Sometimes it's referred to as the "flame sensor." Butane grill lighters work well also. This will cause the thermocouple to turn off the supply of gas, and then your water heater won’t light. This control is part of the gas valve assembly and normally has a dial that will allow for temperature adjustment and will also have a probe that monitors the water temperature. January 2009 in THE MAIN WALL. Water Heater Gas Valve, Standing Pilot With Piezo, Brand Name: Honeywell. My pilot light wont stay lit on my Honeywell VR8200A gas valve. Reason 1: Dirty Pilot Tube. If you have an older model furnace with a standing pilot light, you can follow this basic procedure to relight the pilot flame. Sometimes, this tubing will get kinked in places which will prevent proper operation. As a result, the pilot doesn’t get enough fuel to stay lit. Any gas furnace uses a pilot light to trigger the burners to heat your home. According to the EPA, the new Energy Star furnaces can save about $100 a year in energy costs. So, a pilot light that won't stay lit is often the result of an old and weak thermocouple. Get your match ready. This AM, the heat went down, and I attempted to reignite the pilot, but it does not want to stay lit. Be sure to call us at 770-872-4171 if you’re in the market for a new furnace. With cooler temperatures just around the corner in Newnan, GA, you’ll want to be sure your furnace will be ready to keep you warm. Turn the control valve to “on”. Clogged Pilot Line: Burning gas can sometimes release moisture. If this is the problem, then unkinking the … Do you hink I should go get a new VR8200A gas valve? It can easily be cleaned off with fine grain sandpaper. Then, when the pilot is burning brightly, release the reset button. On it goes. Once the pilot stays lit, turn the pilot valve to the on position. I smell a Honeywell VS8421D valve issue. It is almost certainly the valve is bad and not opening or the fuel is restricted by debris or dirty fuel filter from the tank. If your pilot light ignites but won’t stay lit, then the problem is most likely related to your thermocouple, a metal sensor (about the size and shape of a sharpened pencil) that heats up by direct contact with the pilot light’s flame, telling your gas valve that the pilot light is lit so it’s safe to open the valve to let gas flow. # MI5036FBN) wasn't giving hot water, pilot light wouldn't stay lit and water was leaking from bottom of gas valve (this part). Bradford White 50 gal unit (Mod. Sometimes, this causes the pilot light to stay on for only a few seconds. Honeywell WT8840A1500 - WT8840 Water Heater Gas Valve Control, NG - 2" Spud, 4" W.C. - WATER HEATER GAS VALVE, STANDING PILOT WITH PIEZO, SETPOINT 55-155F, SPUD LENGTH = 2", 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 … No gas = no status lights. The gas supply to the pilot assembly is controlled by this valve. Bent thermocouple: Sometimes, when your gas water heater won’t stay lit, if you check the thermocouple, you may see that it has been bent. HELP! Hold it down for at least 30 seconds in order for the thermocouple to get warmed up. Always turn the valve knob to the off position and make sure to wait at least several minutes for any residual gas to clear away. The gas valve opens and sends gas to the pilot burner. I hope this helped you out, if so let me know by pressing the helpful button. The thermopile (connected to terminals TH and TDTH) puts out 470 mv after 30 seconds and 750 mv after 1 minute. Sparks fine, lights fine, but after I release the pilot button to the "ON" position within 10 seconds the pilot goes out. Thank you Daksy and Tech Guru. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Try leaving the valve in the pilot position for a good few minutes before making that final 1/8 of a turn to the ON position - and make sure any control switch, t'stat or remote is in the OFF position when you do so. It could simply be that the thermocouple is bent. If you own a system that uses a standing pilot light, it is possible to upgrade to an intermittent ignition device. When you release the button, the thermocouple ensures that unburned gas doesn't get released by shutting off the gas when it's not heated by the burning pilot light. The system kept coming back with 4 flashes. If you have a direct ignition furnace, you won’t have a pilot light. It may be that it’s dirty and needs cleaning. If your furnace’s pilot light won’t stay on, the furnace won’t work. If the pilot tube is dirty, let the furnace cool down and turn off the gas. I've got an urgent situation. I suspected the thermocouple and replaced it, but this didn't fix the problem. An overabundance of water can corrode or clog your pilot line. If so, it will not face the pilot light. Reopen the shutoff valve. If your gas water heater doesn’t stay lit, you may have a defective control thermostat. Check the attached links troubleshooting,instruction, Good luck. Furnace Pilot Light Troubleshooting. I've used this furnace for over 15 years without replacing the thermocouple. Country Of Origin: Mexico Product Dimensions: 6.0 X 6.0 X 4.0" The WT8840 series is the Water Heater Control for trade use to replace WV8840 valves used in AOSmith and Bradford White Water Heaters. Locate the pilot valve. I guess I am looking at a replacement that would work - or a 0002797 part number that may be out there floating somewhere for this Vermont Castings stove. Have you got the stove's serial number? Thank you. Newer electronic components improve efficiency and reduce safety hazards like allowing carbon monoxide to accumulate in your home. I've had this unit since I bought my house 12 years ago and would have been installed way before that. Plugged or Damaged Pilot Burner: Similar to the pilot line, the pilot valve light itself can become clogged. Whichever option you choose, it’s important to hire a qualified professional to do the work in order to ensure your family’s safety along with optimal performance. If you have a monometer you can test the gas pressure. It's generally about 1/16" to 3/32" in diameter & can get plugged with dust, pet hair & the like. Note: You must have the pilot lit and the burner on to test for leaks, so that gas is flowing through the large tube. Merrell & Associates Phone: (770) 872-4171, All Content Copyright © 2021 Merrell & Associates | Privacy Policy | Accessibility Statement | Sitemap, The Convenience and Control Afforded by Wi-Fi Thermostats, Indoor Air Quality Concerns for Commercial Settings, Understanding Where Household VOCs Come From. Relight the pilot light. Be sure to inspect the thermocouple carefully. The gas valve sends gas to the main burner(s), which is lit by the pilot light. If your pilot light won’t stay lit, the thermocouple is very likely the culprit. The most likely of those is that the thermocouple needs to be replaced. Bradford White 233-47845-05 - Natural Gas Pilot Assembly, 17/26 Honeywell - Natural Gas Pilot Assembly, 17/26 Honeywell When the gas burner comes on, use a 50/50 dish soap/water mix to test the screw joints for air bubbles that indicate leaks. This is also a likely cause if the pilot won’t ignite at all. There are often telltale signs to alert you that it may be time to replace your furnace. Water heater was working fine till this morning. If there is no reset button or gas valve, simply hold a lighted match to the pilot orifice. Dirt and debris can collect in the pilot tube, causing the flow of gas to be blocked. It is designed for use in Standing Pilot applications using an immersion well for water temperature sensing. These include high energy bills, uneven heating, frequent on/off cycling, humidity problems, noise, excessive dust or soot, and the need for frequent repairs. The Honeywell Q390A thermocouples generate 30mV that is used to sense the pilot flame on gas-fired standing pilot heating systems. Cleared gas chamber of debris, Replaced thermopile/pilot assembly seemed to get more gas to pilot. Starting up after summer. A collection of water on the valve can rust, collect dust, and corrode, limiting the flow of gas. This pilot light may not always stay lit, due to a variety of issues that may affect the gas supply or ignitor. Rheem water heater Pilot Light won't stay lit The appliance is RHEEM "Rheemgas Quick Recovery Gas Outdoor Water Heater" 120810 BD. With cooler temperatures just around the corner in Newnan, GA, you’ll want to be sure your furnace will be ready to keep you warm. Different thermocouples get replaced differently. Blow it out with a can of compressed air (WEAR SAFETY GLASSES!). If the pilot repeatedly doesn’t light after multiple tries, then the thermocouple is probably bad. https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-1219.pdf. Bradford White 50 gal unit (Mod. Pilot won't stay lit! Step 3: If the pilot flame won't stay lit after several tries, it should be adjusted by a professional. I smell a Honeywell VS8421D valve issue. Thankfully, a dirty pilot tube is the easiest issue to fix. Question by wingnut510: The pilot light on my water heater is lit but the burner does not light. I went ahead and got a tech guy to look at it since this went beyond my scope of patience and know how. Cleared gas chamber of debris, Replaced thermopile/pilot assembly seemed to get more gas to pilot. DAKSY is right to suggest a cleaning of the ODS pilot first, but you could have the beginnings of the common failure method of those valves. No fix will be inexpensive here, but the serial would help with figuring out what your options may be... 39B25E8A-293B-42E7-8DE1-943AB026A2EA.jpeg, BFA1D4DD-737A-4B73-B4FF-F440B5C886A6.jpeg, 888A5D3F-13C0-4D03-AAC6-F91D1E8DD757.jpeg, 1234B877-B08C-4178-8C84-62510FCE5D3A.jpeg, 8C7B60B8-597B-4349-A812-70251BA441D1.jpeg, Home Made Pellet Stove Controller (2).JPG, 71A87E55-8AA5-4F49-99FE-9B2E3AE0DDC2.jpeg, B51E5072-2B82-4EE7-98B9-A2C979813827.jpeg. The pilot won't stay lit on my furnace, when I release the button it just goes out. If the pilot is hard to reach, you may have to use a long fireplace match. FYI: One of our customers said that his draft inducer would not start and it was the Honeywell … If the pilot doesn't light, wait a couple minutes and try again. To find out if you need a new one, turn the gas valve to pilot and then depress the override button. I have not heard back from the technician; he said he was pretty booked up, so I called the local dealer who says I can't get the part anymore. Yes Heatsource I am pretty sure he did those tests. Read on for reasons why, and what you can do to fix it. I have a one-pipe steam system, with a Dunkirk boiler. We'll see because he said the value might be spendy. Today’s models have longer lifespans and are considerably more efficient than older models. Some common causes include issues with the thermocouple and pilot tube. Most of the time you can just pull down on them to pull them out of a spring clip that holds them in place. How to Fix. See attached pic of pilot unit. This tubing connects to the gas controller and will ensure a steady stream of gas. Dirty TC( thermocouple), faulty TC, pilot flame to not set properly/small or not close enough to TC, partially plugged pilot tube, faulty/bad gas control valve, all could cause pilot not to stay lit. Another possible reason why a pilot won’t stay lit has to do with the flex tubing. The thermocouple detects the pilot light via sensors. Originally published January 2014, last updated September 2019. This is another relatively small piece of your fireplace that converts heat to electricity, ultimately opening up the gas valve when you turn on … The thermocouple detects the pilot light via sensors. If your furnace is more than 12-15 years old, it may be a good idea to consider a replacement. When you depress the button it bypasses the thermopile. I found two really good YouTube videos made by ACServicetech that explains how to troubleshoot Honeywell Smart Valve gas valves and the different types of Honeywell Smart Gas Valves below. Otherwise, it is usually more cost-effective to replace the system outright. Test for Gas Leaks. Once it has cooled, the pilot tube can easily be cleaned. It’s a box-shaped device and is typically located near the gas burners. Yes if the thermopile is bad then the pilot will not stay lit when you let go of the button. Gas fireplace won’t stay lit, but the pilot light does If the pilot light remains lit, but the gas fireplace doesn’t, it likely indicates an issue with your thermopile . Observed that the pilot light is lit … The button you press to light the pilot bypasses the thermocouple. Some common causes include issues with the thermocouple and pilot tube. Jeff_133 Member Posts: 36. If your furnace’s pilot light won’t stay on, the furnace won’t work. Pilot light won't stay on? This started occurring after I did some gas plumbing and had to relight the pilot. No gas = no status lights. It uses a Honeywell Millivolt Hi-Low gas valve ((VS8420) with a remote wall switch (no thermostat) I checked the switch and it and the wires are OK. A flame sensor lets your furnace know that the pilot was successfully lit. Based on the “Status Light Code,” it means “Temperature Exceeded.” It made sense as we had a heat wave recently. JavaScript is disabled. This will prevent the pilot light from heating it. I have already replaced the thermocoupler twice and it will work a few days but eventually cant get the pilot to stay lit again. Check the Oxygen Depletion Sensor (ODS) hole on the backside of the pilot tube. Keep holding the "Reset" button for one minute after you light the pilot. Cannot be combined with any other offer. A faulty thermocouple may arbitrarily determine that the light is off when you want it on and vice versa. At Merrell & Associates, we carry and install energy-efficient oil and gas furnaces with two-stage and variable-speed heating. A dirty pilot tube can also prevent the pilot from staying lit. Must present coupon at time of service. Since its a Vermont Castings it is probably worth the money to fix? Our top brands are engineered with the most advanced technology and offer optimal indoor comfort. This will keep the flow of gas and ignite the burners. The pilot light is lit by an electronic spark. We have had many people ask us about how to troubleshoot Honeywell Smart Gas Valves. The thermocouple is the copper rod the pilot flame directly hits. DAKSY is right to suggest a cleaning of the ODS pilot first, but you could have the beginnings of the common failure method of those valves. Don't try to adjust the mechanism or tamper with the gas line. He cleaned it all out and said it all looked really good and says it has enough volts, but the valve is most likely the culprit. Q313 The Honeywell Q313 Thermopile generates 750 mV, which is sufficient to operate an automatic millivolt gas control system, independent of any outside power source. I checked the voltage from the thermopile: 750 millivolts with pilot light lit while holding in the button. It did not need to be reset (zero resistance across the terminals). Furnaces of various kinds are gas powered and use a pilot light to supply heat to the unit, including standard home furnaces and floor furnaces. Upgrading can be a good option if you can reasonably expect your home’s furnace to last for at least five to ten more years and it isn’t plagued by any other glaring issues. Call Merrell & Associates for complete details. Make sure the thermostat is in heat mode. He will let me know further what cost and replacement will be. 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. Hi all. The thermocouplers dont look too burnt when I take them out. The WT8840 series is the Water Heater Control for trade use to replace WV8840 valves used in AOSmith and Bradford White Water Heaters. Push the red "Reset" button and hold it down while you light the pilot burner with a match. thanks. I’ve called tech support for the unit, and they had me check the thermal cut off (TCO)switch. For a better experience, please enable JavaScript in your browser before proceeding. You can try bending the thermocouple back into position. More gas to the pilot won ’ t stay on for reasons why, and i to! S a box-shaped device and is typically located near the gas burner comes on, the went. Pull down on them to pull them out just goes out after you light the pilot can... Basic procedure to relight the pilot tube, causing the flow of gas and ignite the to! Pilot assembly is controlled by this valve a spring clip that holds them in place pilot wo n't lit! 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