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When a head gasket blows, it most often causes a lose of coolant either in the exhaust or the oil. When the coolant drops, there is not enough to circulate through the heater core. The engine may over heat but no heat will come out of the heater because there is no coolant in it.

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Q: Does a blown head gasket affect the heater from getting hot?
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Related questions

Can improper installation of a heater core cause a blown head gasket?

No


What is wrong when a 1995 cutlass and recently it started to have high temp and water in the oil heater not getting warm what could be wrong and is it too much to fix?

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How do you know if 2001 Ford Taurus has blown head gasket?

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Do you have blown head gasket if your car wont crank and you are getting gas mixing in with your oil?

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