Question about Goodman GMS90703BXA Heater

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When I turn my heat on the red light comes on for 5 to 10 seconds and then blinks 3 times and then 1 time. but the heat will not come on. please help

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Lets look at the 3 blinks, it usualy means that the pressure switch is not allowing the gas valve to energize. Look at the vent termination for a possible blockage or something effecting either the exhaust or air intake. Next we will need to check the air filter and clean or replace it. Now lets open up the furnace and inspect all hoses going from the inducer fan to a drain or pump. All lines and hoses should be free of water and debris. Also check the small hose(s) going up to the pressure switch (a small round chrome disk with an electrical connection on it). They should be free of moisture. If everything I mentioned looked good, check the vent pipe from the furnace going to the outside for any low spots that may have water in it blocking the exhaust.

Posted on Nov 18, 2009

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Posted on Jan 02, 2017

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