The flame sensor tells the furnace that the pilot is lit. If there is no flame, then the pilot is out. If the pilot light was blown out, your furnace will not ignite properly. My intertherm furnace pilot lights but furnace won't kick on [ 5 Answers ] I need some diagnostic help. Servicing the Pilot on Modern Gas Furnaces Modern furnaces tend to have an electronic igniter or a hot surface igniter, and the pilot compartment is sealed, so you couldn't light the pilot with a match even if you wanted to. Pilot light is still on. Lastly, set the valve to the on position. Furnaces with a standing pilot light do not perform step 4. If there is a flame, but the flame is weak or burning a strange color, then the burner assembly may be clogged and need cleaning. When your gas furnace decides to kick off at random on the coldest night of ... kind of like a candle or if you only had a single flame lit on a gas stove. We lit the pilot light just fine and it is staying on. A flame sensor is still present but it is over the burner’s flame. The problem is the pilot is lit and when you set the thermostat for the furnace to come on it does kick on. A furnace thermocouple is a safety feature that regulates gas flow to your system based on whether the pilot light is on. If your furnace is operating but it just won’t kick on to start heating the home, you might have a different set of problems. But more often than not when the thermostat shuts off the heat, the pilot goes out. If there is a reset button on your furnace, turn the valve to the pilot position and hold a flame to the dedicated pilot gas tube while pushing the button for about 30 seconds. If your furnace’s pilot light won’t stay on, the furnace won’t work. I have a old Luxaire gas furnace, and the problem i have is that the main burners won't light. Step 5 Turn off the gas supply to the boiler. They have HSIs (hot surface ignitors). If this does not light the pilot light, or if you are nervous to play with the pilot light yourself, call a professional! It is the type where the pilot is not always on. Set the pilot valve to the on position. The furnace is a Roberts-Gordon, 25 years old. All Topics Topic Home & Garden Heating & Air Conditioning » Pilot light lit, but burners won't ignite? I have replaced the thermocouple to no avail. It could simply be that the thermocouple is bent. Because of this we thought it might be the thermostat, so we also replaced it with a new one, still it will not come on no matter how high we turn the thermostat too. I have a Dunkirk boiler that won't kick on. It won't pop up. My Furnace Won’t Cycle On — Now What? There's no pilot light. Anyways, the ignition will kick in, and the pilot lights just fine. To ensure gas is getting to your furnace, make sure gas valve is completely open. Keep holding the button until the pilot flame burns brightly, then release the button. The pilot light in our Coleman Presidential 7970C856 furnace won't stay lit. If the pilot doesn’t light on the … Replaced thermostat, and still nothing. After turning the gas supply back on, your furnace should be able to ignite itself. thelightguy Posts: 2, Reputation: 1. The pilot light is lit by an electronic spark. Check your manufacturer’s instructions to learn how to relight your pilot light and contact Jerry Kelly if it continues to blow out. The draft inducer fan kicks on. What Is a Pilot Light? my heater does not “re-light” turns on no problem. Check underneath the furnace to make sure the blue pilot light is lit. Pilot light went out. You will need a match that is lit. New Member : Dec 15, 2008, 11:40 PM Pilot light lit, but burners won't ignite? I have a williams furnace, gravity vented wall furnace, natural gas and the pilot light is lit- and remains lit. Direct ignition furnaces do not have a pilot light. It is typically located either beside or behind your furnace if you are having a difficult time finding it. If it won’t kick on check for a blown circuit breaker and look to see that any associated wires haven’t been chewed through by rodents or become corroded. The most common part to fail is the HSI. It's a Rheem propane furnace. everything good from here. The flame is yellow not blue like it says in the book it should be. It says "depress button and turn counter-clockwise from OFF to PILOT. The last bit of troubleshooting to … A gas furnace's standing pilot, in which the flame is lit at all times, is sometimes referred to as a pilot light. If the pilot comes on, but it won't stay lit, the thermocouple may be bad, and that's probably the reason the pilot went out in the first place. Here are a handful of tips to try: Check the thermostat setting and raise it … Sometimes, this is the only problem that you need to fix, and things will go back to normal. Water heater was working fine till this morning. Or, it could be that your furnace as a whole may just be broken. Hold it down until the pilot flame is lit and burning brightly. But now when we turn on the thermostat there is no click not on the wall that clicks but on the heater … Put everything back together and lit the pilot light. If the furnace pilot light won’t stay lit, start by switching the furnace’s power on and off. This happened once before, seven years ago. A flame sensor lets your furnace know that the pilot was successfully lit. RV Make: sunnybrook, RV Model: 25 foot, RV Year: 2001 . Sometimes, this … A new burner plate (last year) and the blower works. In simple terms, the thermocouple checks to see if your pilot light flame is lit and turns off the gas flow if it senses that your pilot light is off, so you don’t have gas building up in your home. To … When your pilot light goes out, your furnace won’t ignite and heat your home. I've got an older Williams model Propane furnace (model # 450sfa-2) controlled by a Lux 1500 Thermostat, and I've tried everything I can think of. I tuned the thermostat to 'fan on' to see if the blowers work & they do, but obviously blow cold air. If so, it will not face the pilot light. Step 6 Loosen the nuts on the thermocouple and gas line that connect to the gas adjustment knob panel with a wrench. The flame is yellow not blue like it says in the book it should be. Furnace won't make a sound, won't kick in at all. The pilot orifice may be full of dirt. Turned down the thermostat, turned up back up a few hours later. However, the spark ignition just keeps going and the main burners never turn on. Pull the tubes out toward you to remove the burner assembly from underneath … I have an older (1960's) gas furnace. However, if … When we first lit the pilot light, the furnace did come on ONCE. Cleaning out the pilot orifice means disassembling the pilot and clearing out the debris using a needle or compressed air. If you can manage to get the pilot light lit for just a moment, inspect the flame. Circuit breakers also control furnaces. The most common reason the furnace pilot light won’t stay lit. Inspect your furnace and search for a small black or green dial that’s labeled “On,” “Off,” and “Pilot.” If you can’t find the dial … but no heat.i can turn off the heater at the wall control, wait a min, then turn back on and it fires right back up, and the cycle goes again. If you smell gas, immediately turn the … Some older versions may be spark ignition, but still no pilot. If all else fails, it is best to call a professional to come and perform gas furnace maintenance as soon as possible. We light the pilot but the knob should pop up after one minute thus lighting the furnace. I hold the button down in excess of 3 minutes and as soon as you release, the pilot light goes out immediatly. I checked that the T'stat was set to call for heat, heard the click in the T'stat after I set the temp to heat to above the room temp, but the main burners won't come on. 2. If the blue flame of the pilot light is gone, you might need to relight the pilot light. The pilot light is supposed to be a strong blue cone, not a weak yellow flame. This fan gets fresh air into your furnace to create a safe combustion chamber. The thermostat is usually located on a wall in one of the main rooms of your home, or it may be near the furnace. Then I took apart the pilot assembly and cleaned it so the flame is now good. Its main function is to ignite … Locate the dial or valve behind an access panel or on the gas intake pipe. The gas valve opens so gas can flow to the main burner(s) and be lit by the pilot light. 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