Question about Goodman GMS90703BXA Heater

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Circuit board light blinks 3 times heater will not turn on

My heater try to comes on, but after 10 seconds the circuit board will display an error failure and the light will blink 3 times and theres no code guide on the panel .whats the meaning of the code for a goodman gas heater when it blinks 3 times.

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  • bumperooo Dec 13, 2008

    My furnace would not turn on at the desired temp and the circuit board light would blink three times....... Furnace man thought it was the inducer but my wife and I thinks it something electrical..... account light will blink but after the temp gets down so far the furnace will kick on and the light will still be blinking...... If my inducer was bad it would make a loud noise from what I was told....A few times the furnace wouldnt be kicking on and I flipped the system switch off and on and the furnace would kick on right away... Go figure..... Furnace man is scratching his head as well as we are.... Furnace is working fine at the moment......Can anyone enlighten me on what they think may be the problem... Thanks........Michael


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The error code refers to a defective combustion air switch. Coleman Evcons made around 2007 had defective pressure switches or as they call them "combustion air switch". Replace it and the problem is gone.

Posted on Dec 30, 2009

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I had 3 blinking lights, i unpluged wire harness from curcuit board blew it out pluged it back in and everything worked fine

Posted on Dec 31, 2009

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Check your pressure switch, should look like a plastic circle, older ones are metal. take off the ruber hose and gently blow in it and **** listen for a crackle sound, replace and see if that fixes the problem. also look and see what happens when the unit comes on do you get a redish glow? it might even be your flame sensor see if that is clean, will be near the burners with 1 white wire going to it, take it out sand it and repalce.

Posted on Jan 09, 2009

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E0 error - ensure pot or pan is placed correctly
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Not staying lit

Remove the front panel and tape down the door safety switch so the unit can turn on when door is off. Turn up thermostat to make sure there is a call for heat. The circuit board should indicate a call for heat with either a blinking light or a solid light. Then the exhaust fan should turn on clearing the venting from any fumes. When the fan has ran for a few seconds, the igniter should start glowing orange. After it reaches a predetermined temperature, the gas valve should open with a click. The flame will start at the burner closest to the igniter and travel away from the igniter. There is a small flame rod located in the flame path on the last burner that tells the circuit board it feels the flame. If the flame goes off within a few seconds of starting, you have a dirty flame rod. Clean it with a scotch-brite pad. Once you get the flame to stay on for 90 seconds or so, the room air blower will turn on. If it tries 2 or 3 times to start but does not, the circuit board will record a code and display it with a blinking light. Look on the door panel for a wiring diagram. There will also be a Diagnostic chart that will tell you what the pattern of blinking lights represent.

Good Luck!

Nov 23, 2010 | Goodman GMS80453ANA Open Flame Mid-Size...

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Goodman gmnt060 3b doesn't light

check for 24vac between wires on gas valve about 5-10 seconds after ignitor starts to glow. If ignitor does not glow, check for 120 vac to ignitor after inducer goes on.
First...sequence of operation..power to W, inducer motor gets 120v and starts, 10-15 seconds later, ignitor gets 120v and glows, 5-10 seconds, gas valve gets 24v and opens, after 3-4 seconds the flame sensor approves flame and unit stays on. If this is not happening, it has to be in this sequence. Which ever is not happening and you do have voltage to that component, that component is bad. If you are getting a error code on board after it tries to light, pay attention to the code. if a 1 lock out code, that just means it tried 3 times and did not recognize a flame.

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Furnace main fan comes on but the furnace doesn't come on. The indicator red light blinks four times. What does this signify?

You have to get in to the main circuit board. At the bottom of the circuit board it will tell you what the flashes mean, in very small print. Read this print for you codes.

Dec 25, 2009 | Goodman GMS90703BXA Heater

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Won't ignite

Be sure that that PVC vent pipe going outside is not plugged or trapped with water. If the vent pressure switch is not tripping the furnace will not ignite. Also be sure that you don't have a gas leak somewhere causing weak gas flow to furnace.

Dec 21, 2009 | Goodman GMS90703BXA Heater

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I have a Goodman GDS80904BNA. I'm getting 3 blinking lights telling me that the "Pressure Switch is stuck open". How do I fix this?

These furnaces have notoriously bad circuit boards. The light will give you a diagnostic code and after you have replaced every component there it still will not work right. Need to know more specifically the order of events happening. the blower should turn on (draft blower) then after a second a click and you will see the ignitor glow bright orange then click the gas valve opens and the burners light. most of the time this will all happen and then the flame in all burners will go out and it will attempt the whole process over. if this is the case turn power off and then remove the circuit board from the 4 retainer clips and look at the back 9 times out of 10 the board will be dark brown in one or two spots large spots at that. time to replace the circuit board. They have updated the board and it is being made by a different company now. Take a picture of the board before you remove any wires so you can replace the wires in the proper location.

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1 Answer

I turned the heater on after being off all summer and it kicks on for about a minute and the green light comes on and then it just turns itself off, even though I have the thermo set high. I have cleaned...

I bet you have an error code stored in the unit. Try this to retrieve it: Turn the heater off. Hold down on the Economy button as well as the up and down arrows all at the same time for about 3 seconds. Let go and in about 2 seconds a number of lights will light up. I find it easier to have an assistant write down the lights as I call them out. If 60 and LO is displayed, you may have a spider web inside the burner not allowing the unit to light. You will need to remove the front cover and start disassembling the burner. Not an easy task. You can try and shoot high pressure air down the center exhaust tube but that is a gamble that it will blow the web out of the burner. Good Luck.

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Followed start-up procedures, purge blower started up for 10 seconds then stopped. Observed circuit board light blinking constantly.

there is a button under the cover if it is not depressed the unit will shut down make sure the cover is depressing switch

Oct 10, 2009 | Goodman GMS90703BXA Heater

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GMP075-3 looks good but shuts off after 10 seconds

Replace the thermostat control sounds like the control contacts are not holding since you cleaned the bulb and the igniter is working the only other issue is the thermal buld being bad, shut it off heat the bulb for three minuts then quickly turn it back on and see if it stays on longer if it does the bulb is the problem.

Oct 07, 2009 | Goodman GMS90703BXA Heater

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Furnace shut off after 3 time flame from pilot

Sounds like you may have a weak or bad flame sensor. If the circuit board does not sense a good flame it will not light the burners. Also if your furnace is 5 yrs or newer it should give you a fault on circuit board in the form of a blinking or a code itself.

Feb 15, 2009 | Goodman GMS90703BXA Heater

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