How to repair intermittent loss of cabin heat when temperature gauge shows that vehicle is overheating and it is not overheating.

Asked by Jan 14, 2017 at 12:56 AM about the 2000 Chevrolet Impala Base

Question type: Maintenance & Repair

Found at times that hoses to heater core will go cool, temp gauge will rise
quickly to the orange area, and air temp from heater will go cool. This may
happen at idle and sometimes when vehicle is being accelerated.

When temp gauge is showing that vehicle is overheating, the air temp out
of the heater is cool. When the temp comes down, the air temp out of the
heater warms up (gets hot).

3 Answers

98,355

So either a malfunctioning thermostat or low coolant level.

1 of 1 people found this helpful.

Thanks tennis shoes. The thermostat was changed and the coolant level is fine. I believe I will try bleeding the coolant system.

98,355

You may have to elevate the front end to force the air forward, usually the height of a set of ramps will do it.

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