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Rear Diff Temp light - AC fluctuates temp

Tiny
SOLR
  • MEMBER
  • 2006 SUBARU TRIBECA
  • AWD
  • AUTOMATIC
  • 134,000 MILES
Recently returned from a vacation trip- 1,000 miles driven at a time.
During the trip, we felt the AC start to blow warm air at times, for 20-30 seconds, then it returned to cold air again. I don't experience this on shorter trips.
Also, today- returning to work, the Rear Diff Temp light is coming on - appears to be linked to acceleration. If the engine is at cruising speed ( no acceleration) the light goes off.

What causes this, and is this an immediate service issue?
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Monday, July 21st, 2014 AT 10:57 AM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
As far as the rear diffcheck fluid level otherwise it may be an intermittent problem or a wire hitting something. For the a/c problem it may have been a time where far was needed and didn't kick on right away or the compressor clutch may be wearing little and has to much clearance in it so it slips a little. Or something on the belt as well.
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Monday, July 21st, 2014 AT 12:15 PM
Tiny
SOLR
  • MEMBER
  • 2 POSTS
Follow-up:

Took it to my mechanic to check the rear diff oil level ( it's not accessible from the engine compartment- but at the rear axle).

Turns out the sensor connection was rusted out, and the electrical connection was intermittent. He replaced the connector and I was out of there for $90.

And the AC: operator error :). I had turned off the auto-climate control, so the fan kept running even when the compressor wasn't needed.

Thanks for taking the time to respond!
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Wednesday, July 23rd, 2014 AT 9:43 AM

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