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-   -   older rheem furnace 1990 model rheem imperial 80 (http://www.diychatroom.com/f17/older-rheem-furnace-1990-model-rheem-imperial-80-a-89003/)

twbeach 12-07-2010 06:21 PM

older rheem furnace 1990 model rheem imperial 80
 
my furnace turns on then shuts off after a few minutes after about 15 seconds the igniter lights furnace starts and repeats itself 3 or 4 times then does not turn on. If I turn the thermostat off then on it will light up and and do the same thing.

Marty S. 12-07-2010 07:02 PM

Furnaces shut down when they don't sense flame after several attempts. Turning the stat down then back up resets the safety. If it has a flame sensor rod clean it and the burners. Lots of the older rheems used the hot surface ignitor instead of a dedicated flame sensor so yours might not have one. New updated control board and sensor kit is more then you want to spend on a 20 year old furnace.

hvactech126 12-07-2010 07:06 PM

check for codes also cleaning the flame sensor with steel wool may solve the problem


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