Help! - I have read a lot of posts but am still having problems. M...

HOMEOWNER CRIES FOR HELP...

posted: September 8th, 2008 - 2:04pm

QUESTION:
I have read a lot of posts but am still having problems. My outside unit will not start, neither fan nor compressor. I replaced the contactor but still won't start. If I manually depress contactor it will start but stops as soon as I let go. I do not have 24 volts at the contactor.
Also today I took a look at what must be a pressure switch and the casing of it fell apart in my hand. I tried to manually activate the pressure switch and the compressor and fan started, then there was a spark inside the switch and it would not start again. Could the switch have been the whole problem or do I now have 2 problems? Also I wonder if I may have blown the little circuit board by the contactor? Thanks for any help you can offer. The unit is a Lennox HS-25-411 3 ton

ANSWER: A couple of possibilities perhaps you got one of the switch wires against some metal and shorted it out however if your indoor fan is still running that probably did not happen but you definitely need to replace that switch and if your indoor fan is not running look for a small fuse in the board or a circuit breaker on the transformer if you can't find a fuse and your indoor fan is not running you probably burned up your transformer so you will need a transformer and a switch and when you replace them turn off the power and you won't have that issue again.