Question about Cars & Trucks
Is the thermostat working properly?If it is staying open,then coolant isn't getting hot to make heater put out hot air.Check before replacing heater core.
Posted on Dec 30, 2012
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Posted on Jan 02, 2017
You just might have an air lock. Try bleeding the system from the heater hose at the firewall. Losen one hose a little, and at operating temp. open slightly to let air out. You will lose some coolant, but just refill the rad. Now, both hoses should get hot.
Posted on Jan 01, 2010
SOURCE: No heat/defrost 01 corolla
Sounds like you have air trapped in the heater core when you flushed the heater core. loosen the upper most heater core hose and run the engine untill coolant seeps out. Wait until the coolant has reached running temperature.
Posted on Jan 18, 2010
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