Miller M1MB 070ABW Pressure Switch Open
Posted: Wed Feb 24, 2010 11:48 am
Strange situation. My furnace will being its cycle and the pressure switch will flash "open". Thinking it was the switch, I have replaced 4 of them. The last time the switch indicated "open", I jiggled the terminal lead and the light was solid and the furnace fired. I had the leads professionally replaced but it did not fix the issue.
What other items should I be looking for? As I stated, the switch flashes open but will go to normal if I reposition the leads. I furnace will cycle a few times normally but will eventually return to the open position. Very frustrating.
Any info would be appreciated.
Miller Model M1MB 070ABW Serial # M1D021003824
What other items should I be looking for? As I stated, the switch flashes open but will go to normal if I reposition the leads. I furnace will cycle a few times normally but will eventually return to the open position. Very frustrating.
Any info would be appreciated.
Miller Model M1MB 070ABW Serial # M1D021003824