2004 Impala Heater Not Working, but blower does
1 Answer
Dorian answered 3 years ago
Check the coolant level. If the coolant is low, it will cause air to get trapped in the cooling system, so it can't pump the hot coolant through the heater core. Remove the radiator cap, top off the coolant, put the radiator cap back on, fill the reservoir, then bleed the air out of the system from the bleed screw located on top of the thermostat housing on the right side of the engine where the heater hose goes out to the radiator. If this problem happens again, look for coolant leaks.
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