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90% furnace is calling for heat it ruins it's cycle the burners fire up than ruins for about 5seconds than flame cuts out this model was known for the control board to go bad without picking up the flame cutting out. plus its a hot service igniter that may act also as a flame sensor now iam not sure

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I would go with changing the flame sensor first, then change out control board. I go with cheapest parts first. The few factory reps. that I've dealt with in the past that I thought were really honest always told me about 90% of the time it's the control board. Hope this helps. Thanks

Posted on Nov 06, 2010

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Why does it start, then shut down followed by 3 clicks?


  • Thermostat calls for heat
  • Venter motor starts
  • Air switch verifies vacuum
  • Igniter sparks, or glows - depending on furnace
  • Flame starts in burner
  • Flame rod senses flame
  • Burner continues to burn until thermostat stops calling for heat
By your description, I would polish your flame rod, it will be a metal rod that is insulated from the bracket that is screwed to the furnace case and it will have a single wire attached to flame rod,

Sep 29, 2015 | Intertherm 56000 Btu Gas Furnace

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Model DGAA070BDT SER# 0112o6717 Colman Mobil home furnace My furnace makes a internal thump when it's in the cool down cycle after the burner shuts down and only the fan is running before the furnace...


Coleman is known for this. I have seen many over the years make this noise during cool down. The heat exchanger is contracting and expanding. The heat exchanger is the part that the fire burns in. It surrounds the flame, and when the furnace is on, the metal they use for many of their furnaces has a tendency to make noise as it cools off.
One other thing, if you don't already have one, it would be good for you to buy a carbon monoxide detector and put it in the mobile home somewhere up high hopefully in the hallway close to the furnace return air. If the heat ex. is expanding as is sounds, it would be good to make sure it does not have a crack in it , in turn releasing dangerous fumes. Hope this helps.

Apr 18, 2011 | Heating & Cooling

1 Answer

America standard freedom 90 furnace. when the thermostat call for heat the ignitor glows then burner lights but only stays on for 1-2 seconds if i shut off the furnace power for a few minutes then turn...


Hi,

Check the flame sensor and/or the grounding from the burner ot the ignition control....it is not sensing the flame...

Here is a tip that will help you try to figure out why your furnace is not working.

Basic Furnace or Heating System Troubleshooting

heatman101

Feb 25, 2011 | Heating & Cooling

1 Answer

I have a builder installed Goodman GDS80904BHA that is approximately 5 years old. Recently, when the furnace completes a heat cycle, approximately 1-2 minutes after the cycle has completed and after the...


I would guess that the fan off setting on your limit is set a little to high. If you have the manual you can see what it says about changing the running time for the fan after the burner has shut off look on the control board and you should see two switches,one to set the time for burners to fire before main blower starts and one to set time for fan to run after burners shut off. To help with the problem you are describing set fan run time up so fan wii run longer. Hope this helps. Thaks.

Nov 22, 2010 | Goodman GDS80904BNA Open Flame Heater

1 Answer

Furnace cuts off before reaching set temp.


You can make sure it is not the thermostat by crossing or jumping the R and W terminals (or associated wires) together. This will keep the furnace calling for heat. As it is approaching set temperature, get in front of the furnace and inspect the air filter to make sure it is clean, watch the control module for any error codes that may be turning off the system prematurely.

On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the igniter. The igniter will glow and you will be able to see it if viewed thru the small inspection port. Once the igniter gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.

What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the igniter does not energize (bad control, bad igniter), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not light (dirty pilot), the burner does not light (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control).

Mar 07, 2010 | Honeywell Programmable Thermostat Heater

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My york diamond 80 fans come on and I can see the glow then it fires before cutting off after 5 seconds, is this a bad ignitor


Bad or dirty flame rod or burners.

On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the igniter. The igniter will glow and you will be able to see it if viewed thru the small inspection port. Once the igniter gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.

What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the igniter does not energize (bad control, bad igniter), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not light (dirty pilot), the burner does not light (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control).

Jan 09, 2010 | Heating & Cooling

1 Answer

Goodman Model C16-28 1FF is not able to heat my basement. The burners igniting but only fire for approximately 5 seconds. This cycle continues about every 60 seconds. At times the burners only stay on for...


Sounds as though your issue lies within the flame sensor.

The flame sensor senses that there is flame present once there is a call for heat. It sends its signal back the board or ICM and the furnace operates as normal. If no signal is sent, then the furnace automatically shuts down as a safety procedure. The furnace will attempt to light several times before shutting down on a fault code or lockout.


The number 1 reason for flame sensors to fail is they are dirty. Check the sensor for dirt build-up. Clean the sensor with a damp rag or a scratch pad. Inspect the grommets for crackings. Also check and clean all grounds. If this doesn't work, you will need to replace the sensor or call for a service technician to ensure the sensor is the only issue at hand.

Jan 08, 2010 | Goodman Heating & Cooling

2 Answers

Gas furnace, main burner ignites the other 2 don't. then shutdn.


Between the burners is a small rail in the pressed steel where the flame runs across to light the other burners and it sounds like there is dirt or debris in the step over rails causing the problem. You will need to use some compressed air on those rails to clear them out. Once the rails are clear the other two burners should ignite right away.

Dec 21, 2009 | Heating & Cooling

1 Answer

Adjusting goodman propane burners


Yellow flame can also mean inadequate gas pressure. Do you have a manometer? If not, call your gas company for a check.

Oct 09, 2008 | Goodman GMS90703BXA Heater

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