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My goodman gas furnace is not kicking on. the light on the unit is saying that it should be working but it is not. there is no pilot light, the fan is working the heat is not

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My Coleman Evcon T.H.E. 90 Gas Furnace is not kicking on. Our 500 Gallon propane tank is full, filters are clean, blowers work and exhaust fan runs but heat never kicks on. The 1/4 " tube connecting the exhaust fan to the vent motor had some resin built up in it near the connection points. I took it of and cleaned out with a q-tip. Any ideas on possible problems? Thanks.

Posted on Jan 05, 2010

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If you are not getting any codes from the board, then the furnace is not getting a call for heat from the thermostat. A wire may have come off, the thermostat not properly wired, or a break in the stat wire. On a call for heat, you should have 24vac between W and C on the circuit board. This will let you know if you are getting a call for heat all the way back to the furnace.

Posted on Oct 07, 2009

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1 Answer

Have a goodman gas pack and we lost power due to winter storm over night so now my unit is running but only cold air coming out


the pilot light runs from a very small gas jet and should not be affected by the power outage
however that is not to say that the jet may have frozen over and become blocked putting out the pilot light
AS the system needs power to drive the fan it is possible that without the fan and safety system working , the main gas supply solenoid would have shut down and that could have affected the pilot light
with the power reinstalled try lighting the pilot light
I would say that there would be a pizo starter on the front of the unit to light the pilot loght

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might need to bleed the gas line at the furnace, if it has not ran in some time the gas gets weak and will not support the flame needed to keep the pilot light lit

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Why would my Goodman LP furnace CAPF1824B6CA hum, but not kick on?


most furnaces no longer have a pilot, they are all electronic ignition. first thing to come is the inducer motor. if that is what is humming, then either the run capacitor is shot, or theres an issue with the motor itself

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1 Answer

Where is the pilot light on a Goodman LP furnace CAPF1824B6CA


I could not find that exact model but I don't think it has a pilot. I think what you have is a faulty igniter.(its a glow plug)

You need to find it-should be on rt side just in front of a burner venturi. Unplug it and check for continuity.

Dec 24, 2014 | Goodman Heating & Cooling

1 Answer

I have a Goodman forced air heating system in my attic that's only about 3 years old and I believe the pilot light went out last night in a storm. My problem is that I can't locate the pilot in the unit...


Marc, look for where the gas line enters the furnace and remove the panel adjacent to it. That should gibe you access to the pilot light. Also, look for a pilot access door, near where the gas line enters the furnace. The gas line will either be 1/2" flexible copper tubing. 1/2" black iron pine or 1/2" vinyl coated flexible stainless steel. Look for the lighting instructions inside or on the side of the unit.

Hope this helps you solve the problem.

Mar 24, 2011 | Goodman Heating & Cooling

1 Answer

Goodman furnace model # GMNT100-4B On vacation neighbor checked house house filled with gas. He shut off main and furnace. Came home turned on gas to everything except furnace. All good. Furnace will not...


from my experience with goodman units ,it could have been a gas supply problem there are so many protective sensors that i dont think it is the unit by the way is it electronic ignitor or pilot

May 14, 2010 | Goodman GMS90703BXA Heater

1 Answer

We have a Janitrol PGB 048125-1 unit and it is not blowing heat. the fan comes on when in fan only mode on thermostat but once we turn it to auto it goes off. we cannot get the unit to blow hot air. does...


If the unit is newer than 10 years I guess there will be no pilot light per sey. You will have to look at it to tell for sure. Here it is supposed to work. When there is a call for heat the thermostat will close and send a signal to the furnace to start the exhaust blower. When the blower gets up to speed, it closes a pressure switch that will send voltage to the gas valve and to the igniter. The igniter glows or sparks lighting the pilot. Once the pilot lights it sends a signal that all is well, then the gas valve opens up more and the burner(s) light. There is a sensor that tells the control board when the flame has stayed lit. Once that is done, after a period of time or as the heat exchanger gets to a specific temperature, it will turn on the room air blower and blow hot air. Once the thermostat has been satisfied, the furnace turns off. Now, get in front of the furnace and with the door panels off (you may need to tape down the door safety switch to make this work) watch the furnace go thru each step I described. Once you see where the problem is, you can start the proceed of repair. There may even be a flashing light indicating a problem. Find the wiring diagram on the furnace and look for a diagnostic chart and compare the number of blinks to this chart.

Oct 17, 2009 | Goodman Heating & Cooling

1 Answer

My goodman gas furnace is not kicking on. the light on the unit is off. The fan is not working. The manual says it is a ''control failure.'' Is this my circuit board?


I would check and make sure there is proper voltage to the unit before I replaced the circuit board but yes they are referring to the circuit board.

Oct 04, 2009 | Heating & Cooling

2 Answers

Goodman gds80703 turns on and off intermittendly 3 light blinks


There will be a diagnostic code that will blink on the control board. Look thru the clear window at the control board after the unit does not light up. On the reverse of the front panel, you will find a wiring diagram and in that area there will be a diagnostic code table. Sounds like a bad gas valve.

Feb 15, 2009 | Goodman GDS80703ANA Open Flame Mid-Size...

2 Answers

Blower works but no heat


If in fact you have the above listed furnace, you do not have a pilot but electronic ignition. You will need to remove the front cover on the furnace, tape down the door safety switch and then have someone help you by turning up your thermostat to a very high setting. Watch and listen inside the furnace. There should be some blinking going on at the control board followed by a small blower fan starting up. Then after 10-15 seconds there should be a click followed by an orange glow viewed thru the viewing window to the burner section. In a few seconds the gas valve should click and the burners will ignite. There is a safety switch that will sense flame and then keep the gas going to the burners. If it does not sense it, it will shut it off within 10 seconds. If all is well so far, your blower will turn on in about 90 seconds after flame. There is a diagnostic code chart on the back side of the access door if you get an error code (blinking) on the control board.

Always check little things like air filter, condensate drain and broken or loose wires.

Nov 05, 2008 | Goodman GMS90703BXA Heater

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