Quote:
Originally Posted by mattdavis11
PM sent. Coils sometimes short to ground when the front seal blows. They can also get very hot, melting the insulation and ruining it.
Show me some pictures, and I'll be able to tell you.
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Photo attached.
I am certainly no expert on this, but it looks like the pulley was rubbing on on the coil and I had been hypothesizing that that friction caused enough heat to melt some of the insulation and short the coil - or short it enough that it overheated and melted even more from the excess current. The places where the pulley was rubbing on the magnet both line up with the direction that the belt tension would be pulling the pulley. The coil doesn't seem to be deformed so I am assuming that contact with the pulley was a cause of the failure and not a result? Does that make sense?
There is a sort-of reddish dust covering the coil and everything around it (compressor, driver-side fan, belt, hoses, etc.) that wasn't there a few months ago. I was presuming that it came from the once red colored plastic in the magnet. I think you can see it pretty well in the photo. (The rust looking stuff isn't rust but whatever this red dust is. There is no rust)
The front seal on the compressor looks fine with no signs (or measurement - I have a sniffer) of leaking. The seal is relatively new - I replaced it along with all the other compressor seals (they were all leaking pretty badly) and other AC seals about a year ago and the AC had been working fine until the coil shorted a few weeks ago.
Anyway... I would greatly appreciate any expertise that you can ofter. I can fix this problem easy enough, but I certainly don't want it to happen again!
Thanks!
