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Thread: Temperature Guage bouncing
11-15-2013, 03:37 AM #11
as mostly everyone has pointed out, Thermostat being bad would be my first bet, second being fluid level, third would be losing pressure in the system via a leak, last being a clog.
Did the heat ever come back or just stay cold?? And what did the temp of the truck do when this happened? the two could go hand in hand.
One way to check and verify that the blend door is actually working on your pickup would be to actually run the A/C and set the temp all the way to cold and once it becomes obvious, you can change the temp selector over to the hottest setting. If the blend door is working, then it should become noticeably less cold (assuming there's still no heat in the core). After you notice the change, take it all the way back to the coldest setting and verify that it does in fact get colder. That will eliminate that problem.
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11-15-2013, 09:26 PM #12
Did you change it? Results?
Last edited by Pikey; 11-15-2013 at 11:17 PM.
1995 Silverado 4x4
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11-15-2013, 09:36 PM #13
I second the low fluid level. Had the exact same issues in my 98 Suburban. Had a small leak and over time it got to a low level and I experienced the same symptoms (temp going up and down/heat going in and out). Once I filled the system up to the current level the problems went away. I ended up fixing the overall problem (leaking intake gasket) and the issues were gone for good.
11-15-2013, 11:12 PM #14
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