A/C Pros in Highlands Ranch area?

[Ramsker]

I've dealt with many many shorts in low voltage.. I've never been able to NOT find them and/or isolate them and KNOW which wire is shorted either. Does your buddy have a multi-meter? Does he truly know electrical or just enough to get dangerous?

The only reason I ask is because in 14 years I've only had maybe 3-4 shorts in thermostat wiring going up through the walls to the thermostat. Not saying it doesn't happen, and you may have that issue but it's not exactly common.

I have however, had lots and lots of bad contactors cause this exact issue. He needs to either find the short with his meter to ground and/or isolate the AC low voltage circuit from the furnace low voltage.

Let me know what he finds.. Its kinda rare to have a true short in that wiring.

He had a multi-meter. He's the owner of the company and they've been around awhile and seem to have a good rep . . . so I assume he knows what he's doing. It could be that my description of everything is more the problem in my word choice or order and since I'm not great at electrical and don't know that side or HVAC all that well. "Suspects" was maybe a poor word choice on my part. The short that was frying the transformer was in the wire he eliminated from what he was saying and when that was taken out of the equation everything was then working and not blowing the fuse. What he was saying was that he couldn't see or be sure where that short occurred in the line because it wasn't where it was visible . . . and that if there was a spot that somehow rubbed through to short that wire, that it could rub through another of the wires somewhere down the road and short there instead (or it may never happen or it could have been a nicked wire to begin with that finally made contact, etc). I'm assuming he checked other things while he was down there to see if there were any other obvious sources of a short but I wasn't watching him and probably wouldn't really know what I was looking at anyway.

I mean . . . I can only go on what I know (which is not much, but trying to learn) and what he's telling me and advising on what he'd do if it were his house.

When you say "bad contactors"--what would examples of that be? Is that just connectors on the board? I'm pretty remedial with electric and HVAC so I'm trying to get a better understanding of it all.