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Gucio
Apr 6, 2007, 12:36 PM
Hello
I have a old GMP125-4. That whats going on : Thermostat in my room sending signal to furnace.Motor starting work and then is nothing .... I can see trouble code (flashing light) it is 3 flashes and long pause, again 3 flashes and pause .... Do somebody know what that code is mean ? - I have instruction manual but there is nothing about trouble code. PLEASE - I'M REALLY COLD !!!:(
I will really appreciate for any kind of help.:)

hvac1000
Apr 6, 2007, 08:23 PM
Try cleaning the flame sensor with steel wool. That is about as much as a untrained person can do. if thast does not work call for service.