Question about Goodman GMS90703BXA Heater

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Thermostat at 70, shuts off at 62. stays only 1/2 hour at at time

The Thermostat is new, honeywell, dial style. All was working until recently. Now we have to turn the thermostat down to below showing temp, (62) listen for click. then turn it back up until it clicks again. The furnace goes on after 2 or 3 tries and only stays on for about 20-30 minutes. Goes for hours before it will try to restart then it fails several times. LED like does not send a specific signal, it just keeps flashing on and off.

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  • rhickey2005 Jan 31, 2009

    I know the LED light blinks with a cadence, that's why I wrote that it just kept blinking on and off, I stopped counting after 19. Later on I took off the cover and checked again. I got a sequence of 4 blinks.


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What LED are you talking about that keeps flashing?

If it's the LED on the controller board in the furnace, they blink with a cadence that you need to watch. There will be a data sheet somewhere on the furnace that will tell you what the cadence (flash cadence) is.

Replay back and I can help you more.

Posted on Jan 30, 2009

  • Mark Egan Jan 31, 2009

    OK. Now we're getting somewhere.

    Look on the your panel for the unit or control box and tell me what the 4 blink code is.

    I will be in and out today, but I will get back to you.


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