Question about Goodman GMS90703BXA Heater

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The fan starts and then the flame ignites but goes out. How do I confirm its the Flame Sensor and not the Limit Switch on a Goodman GMT090-3B Gas Furnace.

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Clean the flame sensor first .

Posted on Aug 15, 2010

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SOURCE: The fan starts and then the flame ignites but goes out

Did you clean the sensor with a piece of sand paper? Then wipe it with a dollar bill. The bill has a fire proof like chemical on it. Rubbing it on the sensor will coat it and keep it cean longer. If this dont work let me know

Posted on Mar 21, 2010

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How to fix a pressure switch on a goodman Gms807034ana


Since the burners light this eliminates the pressure switch as the problem. Typically when the burners come on and shut off quickly a flame sensor, ground problem or the limit switch tripping are the main reasons. Since the flame sensor has been replaced, check the limit switch

Jan 04, 2013 | Goodman GMS80453ANA Open Flame Mid-Size...

1 Answer

Furnace problems


On - OK
1 Blink - Ignition failure. Check Gas flow, gas pressure, gas valve, flame sensor.
2 Blinks - Closed pressure switch. Check pressure switch (stuck in closed position).
3 Blinks - Pressure switch - failre to close. Check venter, pressure switch, vent blockage.
4 Blinks - Open limit switch. Main limit or aux limit are open. (My comment - Means overheating in chamber. Often result of blocked intake air. Bad filter. In my case, plastic wrap had been sucked into the intake. )
6 Blinks - False flame sensed. Check sticking gas valve.
Rapid continuous blinking - Incorrect twinning, incorrect primary polarity. Reverse transformer secondary leads, reverse primary wires.

Closed pressure switch can be from dirty combustion vents, bad chamber pressure - like missing screws, maladjusted gas pressure, failing pressure switch, loose hoses, moisture in the hoses or fan blades The switch need to be closed to ge the unit to work

Jan 23, 2008 | Goodman GMS90703BXA Heater

1 Answer

I have a goodman model gms80703ana the burner comes on and when the blower comes on the burner goes out.


This can be due to a dirty flame sensor or a high limit switch tripping. Clean the flame sensor first, this is a metal rod on the opposite side of the igniter, take steel wool and scrub it, then reinstall. If this does not work then the limit switch is tripping due to dirty filter, dirty blower wheel, weak blower motor. Aything that restricts airflow will cause the limit switch to trip.

Nov 30, 2012 | Goodman GMS807034ANA Heater

1 Answer

Goodman model PGB036075-1B will start the gas and the burner but will shut down before blowing heat. Is it a bad switch?


Hello, sounds like either a dirty flame sensor or open limit switch. First try cleaning the flame sensor by turning power off to the furnace and using some steel wool. If the flame sensor checks out good then you limit switch is opening becuase of lack of airflow. check air filter, clean blower wheel, and check to make sure the blower wheel is running at proper speed and not dragging sometimes cause by a weak capacitor.

Mar 06, 2011 | Goodman Heating & Cooling

1 Answer

Goodman gms80903bna light blinks once fan runs all the time,


I believe this code is ignition failure.
Turn power off and after 20 seconds turn power on with thermostat calling for heat. Vent blower should come on first. After a bit igniter should lite up. You should hear click noise of gas valve open up. If igniter does lite and you hear click noise, flame should come on for a few seconds minimum. If igniter doesn't lite and you hear click noise from gas valve, igniter is bad. If flame lites and then goes out, flame sensor probably needs cleaned. Both igniter and flame sensor are in metal plate under burners. Igniter has 2 wire going to it and flame sensor has one wire. If you think it is flame sensor you can remove with taking it out with 1 1/4" hex screw. Flame sensor will have white film on it if it needs cleaned, clean with steel wool or a dollar bill. If it isn't weither of these it is gas valve or circuit board.

Jan 27, 2011 | Goodman Heating & Cooling

1 Answer

The Goodman Heater was installed in 2004. Thermostat set at 75F, the fan that blows CO2 out was on for about 1 minute, then I could hear the sound of the gas blowing into the furnace, but the ignitor...


Problem: Your furnace will not ignite the gas to produce heat for your home. When a furnace has a bad ignitor what I see most of the time is the following sequence of operation:


1. Thermostat calls for heat. 2. Draft inducer motor starts. 3. Pressure switch attached by a small plastic or rubber tube senses the negative pressure produced by the draft inducer and closes. 4. Draft inducer runs for 30 seconds to a minute before you hear a gas hissing sound. The ignitor did not glow, the flame sensor (a small metal probe about 1/8" in diameter, with a white porcelain base) does not sense the flame, so after 8 to 10 seconds the hissing sounds stops with no ignition of gas to heat your home. Your furnace shuts down and goes into a lock out condition until you turn your power switch back off and on again. Then the sequence starts all over again with no ignition of the gas. Solution:You probably need to purchase and install a new ignitor. I would suggest that you inspect your ignitor closely for cracks. Make sure you do not touch the ignitor with your bare hands. If you do not visually see a crack, then you could have a furnace control board problem or a limit, rollout switch problem. The furnace's control board might not be supplying the voltage to the ignitor. If your furnace lights and the gas stays on for 8 to 10 seconds, then shuts right back off, then you need to clean your flame sensor with light sand paper or steel wool. You might need a new flame sensor, but most of the time they can be cleaned an will work well after cleaning.

Nov 30, 2010 | Goodman GMS80903BNA Heater

1 Answer

The fan starts and then the flame ignites but goes out. How do I confirm its the Flame Sensor and not the Limit Switch on a Goodman GMT090-3B Gas Furnace.


Did you clean the sensor with a piece of sand paper? Then wipe it with a dollar bill. The bill has a fire proof like chemical on it. Rubbing it on the sensor will coat it and keep it cean longer. If this dont work let me know

Mar 21, 2010 | Goodman GMS90703BXA Heater

1 Answer

Code continous flashing


If your igniter comes on but no ignition, that eliminates the possibility of a bad or clogged pressure switch, high limit or flame rollout switch. Sounds to me like you have a control board, or a gas valve going bad. Could even be some loose, corroded, or faulty wiring. Before the igniter comes on the furnace does a self diagnostics to ensure everything is working, or the furnace will not make it to the igniter sequence. Inducer motor, pressure switch/s, limit controls are closed…then comes on the ignitier, gas valve opens, pilot runners and burners ignite, flame sensor detects the flame, blower comes on and all operations are working.

Hope this helps

Oct 27, 2008 | Goodman GDS80904BNA Open Flame Heater

2 Answers

Ignition failure after three attempts then sits for an hour.


try cleaning the burners and or adjust the distance the igniter is from the actual burner .

Oct 01, 2008 | Goodman GDS80904BNA Open Flame Heater

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