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Heater won't come on - Goodman GMS90703BXA Heater

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The first thing to do is verify that you have power to your heater.If you have a volt meter you can remove cover from electric box inside furnace and set meter to a.c. volts and check across black and white wires. You can also turn your thermostat to fan on setting and fan should run if not you may not have power to heater or bad t-stat.
After you're sure you have power to heater turn thermostat to auto and heat. Turn temp setting up high enough to call for heat. See if your induced draft motor comes on. If it does not then check electrical connections or replace draft motor.If you have power to heater and t-stat is good if draft motor does not run then nothing else will work.
You can by pass t-stat to see if it's the problem by removing cover and and taking base off the wall to get to stat wires. Locate wires that are hooked to terminals marked R or Rh and W. Remove these wires and touch them together. If t-stat is bad this should make heater come on and run. If this works then you need to replace stat.
If this does not help you please let me know and tell me what you have found and I will do my best to assist you. Thank you

Posted on Jan 02, 2011

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Posted on Jan 02, 2017

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