Rheem classic 90 plus

Old 11-15-13, 05:05 AM
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Question Rheem classic 90 plus

I have a rheem classic 90 plus that starts to go through the start up and will run but the direct spark igniter never tries to spark. The filter is new and the switches seem to be working. The gas valve does not open. Is this because the spark igniter isn't sparking? There are not any codes either. The two green and one yellow are all on. The Furnance will just run blowing cold air for hours. Thanks

Last edited by Pot5271; 11-15-13 at 06:22 AM.
Old 11-16-13, 08:55 PM
Join Date: Nov 2013
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ignition problem

ten year old unit worked perfectly until one month ago.now if it sits without starting for a couple of hours, unit will start and try to run

,igniter will click but no flame or yellow flame light.will do this approx 5 times then status light blinks and will go off.i can get it to work if I turn thermostat off and back on and retry. where would be best place to start?

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