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Problem with heater

 
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Old 03 Dec 2010, 01:18 am
cllwyrc's Avatar
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Default Problem with heater

The heat in my pt cruiser does not stay warm for very long, it will keep going from cool to warm after car is up to running temp & even does it going down the road. At first the coolant temp would fluctuate but I changed the thermostat and now its just the heat. Is there an air pocket or do I need to replace the heater core?
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Old 03 Dec 2010, 07:43 am
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Default Re: Problem with heater

Did you bleed the coolant system after the thermostat change? You probably do have an air pocket and it needs to be bled out.
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Old 03 Dec 2010, 01:32 pm
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Default Re: Problem with heater

Whats the proper way to bleed the air out. I did bleed it a little bit afterwards but I don't know the proper way of doing it.
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Old 03 Dec 2010, 01:45 pm
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Default Re: Problem with heater

OK so you know where the bleed screw is since you say you did a little.

Radiator cap off, fluid right to the top. Fill the overflow container near the firewall, right up to the COLD line. Radiator cap back on. Unscrew the bleed valve till no air comes out, tighten valve.

Next: Use extreme caution, everything will be HOT.

Turn the engine on and turn the heater on and wait long enough for the water to get warm and the thermostat to open. Open the bleed valve again and see if there's any air coming out, if it's coolant or when the air stops coming out, close the valve.

Wait another few minutes and repeat the procedure above. Again, be careful, it's HOT.
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