Mechanics

CADILLAC DTS COOLANT PROBLEM

2006 Cadillac DTS • 88,000 miles

My question is related to heating. The vehicle will not heat up when idling, but blows warm/hot air air when it is being driven. It appears normal after this, and the temp gauge indicates the appropriate temp. Range. On occassion, the gauge did rise higher, but then returned to normal. I added coolant to the reservoir, but problem continues. I was thinking it may be the thermostat. Any assistance appreciated.
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Guest
October 20, 2012.



May well be a faulty thermostat, it may be stuck open or collapsed in the open position, I would be checking this first.

Mhpautos
Oct 20, 2012.
It could also be low on coolant causing an air pocket or a restricted heater core.

Wrenchtech
Oct 20, 2012.