One of the most common culprits of a furnace that is having a difficult time lighting is a low gas supply.
Goodman furnace running but not heating.
It could also be the pressure switch or blockage in the vent.
But it s not hot air coming out it s cold.
Turn the circuit breaker off and on to reset an electric furnace.
The ignitor is not heating up and the exhaust fan is not turning on.
Lastly if your home is not weatherized your furnace might not be able to reach the temperature that you set your thermostat to.
Then check to be sure that the thermostat is set to a temperature high enough to trigger the furnace to emit heat.
The status light is blinking 4 times over and over.
If the igniter is cracked replace it.
The house is cold.
There s nothing to it.
If power is getting to the blower motor but the motor does not run the motor may be burned out.
If after doing all these things the furnace does not produce heat it might require a new igniter in pilot less furnaces.
If the blower motor is burned out replace it.
If the blower motor hums check the blower fan to ensure that it spins freely.
First make sure that power is getting to the motor.
The blower is staying on even with the thermo turned off.
The blower motor blows air through the return vent past the heat exchanger and into the home s venting.
If the igniter fails or cracks the furnace won t heat.
Is this a parts problem or too much for a good rooky to handle.
All you need to do is locate the gas supply valve and rotate it in a counterclockwise direction to open it.
The igniter gets very hot and glows bright orange to light the gas burner.
This may be the case if your goodman furnace won t ignite but the light is on continuously.
As if the furnace is just recirculating the air in your house without actually heating it.
Simply use hvac tape to cover up any leaks and reattach any sections that have become detached.
My goodman funace gmpn 100 4 is blowing but no heat.
If the igniter is not cracked use a multimeter to test the igniter for continuity.
Goodman furnace not igniting burners if this is the case it could be several things depending upon the error code that you are getting.
If the burner does not ignite gas could be not reaching the burner the flame may not be lighting or the vent motor may not be running.
You can hear the furnace running and you can even feel air coming out of the registers.
To determine if the igniter is faulty remove the igniter and inspect.
