OK if you did your jumping at the t-stat. and it did not work the I will assume you will get power between c and g at the unit. Rember to turn the fan to the on position at the t-stat

Without resetting the breaker, I have 0A and 0V. Fan is in the On position too.

OK check between R and C for 28 volts

And your sure that door switch thing you was talking about is pressed in correct?

Well, the door is shut... I do not see how it can be pressed any dirrerent. It is screwed down...

Ya nada on the C-R readings. Remember, I have no reset the breaker yet. Should I reset it?

Nope not yet. Do you have a breaker up there you reset or like a light switch?

Light switch...

OK one last thing to check before you reset. Find the transformer.


http://americanhvacparts.com/Merchan...rols%20Y65.jpg

You should have 110 volts going into it and 28 volts coming out

Then after you do that I have anouther idea to try

Nada at the transformer. I took off the wire nuts on one end (white and black) and tested between them and got 0. I took off the wire nuts at the other end (red and green) and got nothing. Although the red and green were paired with different colors at the nut. But alas, nothing. I am getting more volts across my body right now according to my meter then this thing is.

OK then we have got to the problem then. Take off the door that has the switch wait 10 seconds then push the switch back in. you still have your fan set to on? The blower should come on when you push it back in. it will act as a reset to. If it does not then your problem is the light switch you have been resetting is going bad and not making contact or there is a lose wire in it.

Ok trying that now...

OK I will wait for your answer

Also before you reset the light switch check for 115 volts right there at the door switch!!

Dang it, I just got that door put back on... and it is a bugger to get screwed in! :)

No, no luck taking off the door and letting the door switch reset it. It does not appear that this thing is getting any juice!

This might be a dumb question but here it goes. Is there an internal sensor of some sort (almost like an internal fuse or breaker) that would be tripping but being reset once the light switch is turned off and then on?!

I guess I could check for power at the light switch. That scares me a bit because I have been known to electrocute myself from time to time. (Electricity was not my strong point in physics class) but If power is coming into one end of the switch but not leaving the other, then it is the switch right?!

Other then the door switch, and the light switch there is nothing else that would be keep power from going to the transformer you checked so yes if you check both sides of the light switch if there is not power on 1 side then it is deffenty the switch. Ps if it is going bad or has a lose wire. When you start to move it to check for the power the unit may come on.

Ok... One last trip up the stairs and up the ladder into the attic! :)

Lol, I know that must be a pain. But at least we are almost done

That did it... Wiggling the wire at the light switch made the unit come on. So it is the wiring in that switch... THANK YOU so much for your help. That is an easy fix that I should be able to do myself. Now, all that is left is to figure out if my compressor has a leak (since it was down to 40 PSI when last checked and refilled) and enjoy the cooling air this summer. This has been a nagging problem for almost a year and thank you for getting to the bottom of it!! Do you handle car AC too?! J/K :)

Yes I do car ac as well. Have a great day and make sure to turn the breaker off before messing with that switch. Glad I could help. Intermittant problems are always a pain I will be on later today and tomorrow if you still have any more questions with this or your car. Have a good one Josh