[DML] Re: A/C cutting out

["Harold McElraft" <hmcelraft@xxxxxxx>]

Sounds like an electrical circuit or the clutch on the AC compressor.

If fan speeds 1 and 2 work then the fuse that runs the clutch is ok. 
Sometimes the clutch windings lose the ability to engage the clutch. 
You can check the current draw by jumpering the clutch at the 
connection at the clutch. 12 volt positive. You should get a nice 
snap engagement which tells you there is too much resistence in the 
circuit somewhere before the compressor. If the clutch engages slow 
or drags or gives up after a few minutes there is probably too 
little current draw indicating an open winding (3amps minimum) which 
means replace the clutch or compressor.

Harold McElraft - 3354

--- In dmcnews@xxxxxxxxxxxxxxx, "Ryan Wright" <ryanpwright@...> 
wrote:
>
> My A/C simply cuts out sometimes when driving. The air will blow 
nice
> and cold, then at random will slowly get warm. It eventually kicks
> back in and cools down again, sometimes after 30 seconds, sometimes
> after 5 minutes. Driving doesn't affect it - I can be at idle or at
> speed the entire time.
> 
> I suspect one of the pressure switches is kicking the compressor 
off
> when it shouldn't; all fans (interior blower & cooling fans) are
> working fine. I'm running R12 and the system is full per DMC specs.
> A/C shop looked at it but the problem is intermittant and they're
> having trouble diagnosing it, as every time I bring it in the darn
> thing works fine.
> 
> Any advice on how I might troubleshoot this?
> 
> -Ryan
>









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