I have a problem with my car heater blowing cold air. Someone said I should do an air bleed to clear it. How is that done? The original problem started when I had a coolant leak and when it was repaired I found that my heater was no longer blowing hot air. Any help with this?
With engine cool, remove rad cap, top up coolant to 1" or 2" from top in rad. Start engine & turn your heater on, (not defrost) and let it run like that until it gets up to normal operating temperature. Keep an eye on fluid level in rad, & top up as needed. Let it run, until your rad fan comes on, & off, 2 or 3 times at least. That's telling you that the thermostat has opened & hot coolant from engine has returned to rad for cooling. Every once in a while while your waiting, rev the engine slightly for a few seconds, just to assist the circulation & help bleed air out. Feel the heater now & you should feel hot air coming out. Top up rad to 1'' or 2", put cap back on, all the way, top up your return bottle to proper mark/level, and you should be good to go.
Go to your nearest autoparts store an buy a manual for you 96 toyota corolla ... they are helpful it will show you pictures where the bleeding valves or screws. and how to do it right step by step.
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