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plugged heater core possibly

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Hmmm,any way to tell?

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don't forget the temp. control valve in the heater hose, might not be opening all the way.

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Check your temp gauge to see if the temp come up to correct temperature.


Use a temp gun if needed.

Check both lines leading into and out of the heater core. Both should be hot when the heater is on 'hot' If they are not both hot, water is not flowing thru. Check the heater control valve.

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