I have a Rheem furnace Criterion II that will not blow air. I can hear the gas flame kick in but the blower never starts. The LED on the control board blinks 3 times then off for 2 seconds which is suppose to indicate limit switch open. Should I rely on this and replace the limit switch? Is their a way for me to test the switch removed from the furnace with a VOM meter and a heat gun?

Thaks

The limit switch might have a reset in the center. Try that first.

Rheem rgph 10eamer I have the same basic proublen... but my blower would not stop running... code was 3 flashes and 2 sec pause... also.. no spark or heat... after cking the swiches as much as I could... for some reason... it started working... heating up... can the 4 wire roll out switch cause that proublen?. tks 1000
Richard