Question about Goodman GMS90703BXA Heater

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Blower comes on but no heat

THe thermostat was replaced when the heater would not come on, but after that the heater would still not come on

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If there is a problem with the furnace, it will display a number of blinks on the circuit board. You will need to look thru a small window because if you take off the access door, it removes power from the furnace and erases the code. Once you count the number of blinks, now remove the access door and on the reverse side you should find a diagnostic error code chart to get you started looking in the right direction. If there are no blinks, it means that the thermostat is not sending a signal to the furnace to start (check the thermostat for proper operation and wiring).

I hope this helps.

Posted on Nov 11, 2008

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