Question about Chevrolet Lumina
You either have a thermostat that is stuck open or the heater core is plugged. Get the vehicle warm and feel both of the hoses going to the firewall/heater core. Both of the hoses should be hot to the touch. If one is hot and the other considerably cooler, the heater core is plugged. If both are relitively cool, the thermostat is stuck open.
Posted on Jul 27, 2009
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Posted on Jan 02, 2017
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