heater is only blowing cold air
Waiting for answer
Either a thermostat, air pockets in the cooling system, low coolant, plugged heater core, or blend door actuator. Check the heater hoses, if one side is hot & the other hose cool, possible plugged heater core. Some times back flushing may take care of it.
One other thing I forgot to mention is the heater valve may not be working to allow climate control. I believe it works off of vacuum. It would be in a heater hose.
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