Having problems with your Air Conditioners ?
Lennox G40UH-60D-135-14 Furnace will not ignite
Do you have an inducer on the unit (no access to the lennox model number tonight)? That is a motor that comes on shortly before your unit fires that blows the combustion gases up through the flu. Does this motor come on at all if you have one? If it does and the furnace will not light, then there is a device on the unit called a pressure switch. This switch has two wires to it and a small tube that leaves it and goes to the inducer housing. Remove the tube from the inducer and blow into and draw in air lightly or until you hear clicking noises. Replace the hose and try again. Sometimes the pressure switch gets stuck but can also go bad. If everything is coming on all the way up to ignition but the unit won't come on, then it's probably one of the limit switches that need to be reset. These are little disks about the size of a penny and have two wires going to it. In the middle is a small button that can be pushed to reset it. Some units have 2 to 3 and others have more. You have to use a flash light and look all in the unit around the burners and around the flu pipe looking for the limits. Once you have found them all and tried to reset the unit, then try to start it up again. Hope this helps.
I had a similar problem that started right after i changed the batteries in my Honeywell thermostat. I know this is really dumb, but it had me scratching my head thinking my furnace/pilot light was having issues. When i plugged my thermostat back into the wall, i accidentally bent the far right pin and it wasn't connecting (or was also touching another pin). This caused the same symptoms where everything seemed to be turning on when it was supposed to, yet the heat never fired. Frustrating, but in case anyone just changed the batteries, you'll want to make sure it fits perfectly back on the wall and that you didn't bend a pin.
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Lennox G40UH-60D-135-14 Furnace will not ignite
Do you have an inducer on the unit (no access to the lennox model number tonight)? That is a motor that comes on shortly before your unit fires that blows the combustion gases up through the flu. Does this motor come on at all if you have one? If ... Air Conditioners
Lennox Conservator III G16, Furnace, Burners stay lite for 90 seconds; no blower; but exhaust fan runs continuous. If I use a jumper from the white heat wire (including white heat wire) to the green blower wire terminal (removed the green thermostat wire) the blower fan runs (non-stop) & igniter & burners restart every 10 mins. when I remove the jumper (& wire to specs from the thermostat to the furnace) igniter & burners kick on for 90 seconds then nothing on the unit works except the exhaust f
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Lennox furnaces G2603/4-100-5 not igniting Left LED OFF and right slow flash. I have cleaned the in-let I find water standing in it and little lint. Even after that it is not igniting. I saw he fan that is connected to in-let is not able to rotate, I saw it trying to rotate but could not pick up the speed as it something is stopping it. When I touched it, it was very hot.
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I have a Lennox Conservator G8E furnace with Johnson Y79ABD-1 ignition control. More and more often now, when the thermostat calls for heat the ignition seems to go through it's spark/sense sequence and then shut down. Then of course the heat never comes on. Other times it operates normally. Do you have any explanation for this erratic behavior?
You need to check the flame sensor and make sure it is putting out 4 to 6 microamps from the wire to ground ... Air Conditioners
I have a Lennox furnace. The pilot light is lit, but the burners do not ignite...no heat to the house as a result
You have a multitude of things it could be.From a open safety switch to a bad gas valve. I need to know what the model number is on the furnace. You can find that by opening the door where the burners and gas valve are and it should have a sticker in ... Air Conditioners
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I have a lennox 2 stage gas furnace and a lennox XP15 heat pump controlled through the Lennox 7000 touchscreen thermostat. I want to disable the heat pump due to excessive noise due to lower temperature at this time of year (+5C and lower) and have the furnace operate without the dual fuel feature. Can this be done at the thermostat or it requried to disable at the furnace? Any input would be helpful. Unable to locate 'installer manual' for thermostat.
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I have a ruud achiever 90 plus furnace. Thermostat is set for 70 degrees. I hear the furnace click on and try to ignite. It does this four times and blower comes on without the furnace igniting. Cold air is coming out of the vents. What is happening to my furnace?
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Sounds like the ignitor is bad. there shoule be a 2 wire plug going to it. after the inducer motor starts, you can check the voltage at the 2 wire plug located under the burners. you can unpug it to check voltage or you can probe the back side of the ... Air Conditioners
Lennox G40UH(x) series - Air not coming on
Electrical connections @ the furnace may the thermostat .Tom ... Air Conditioners
I have a EVCON furnace DGAT070BDC. I replace the igniter control, the gas valve and the thermostat. Same problem continues: glow stick works, then the pilot lights works.The igniter control clicks continuously and tries to light the furnace. After a while the system cuts off and then starts trying again with the same results.
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Hint number 1, get HVAC license. One mistake or misunderstanding and you could blow your house up. ... Air Conditioners
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