Question about Chevrolet Cavalier

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No heat in 91 cav

Very little heat coming from any of the vents/defrost/heater the fan works on all speeds just that the air is not very hot more luke warm than anything

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  • 48 Answers

Need to check the coolant level to ensure that it is full. If full, check the hoses going to the heater core. Both hoses should be hot. If one is much colder than the other, you have a stopped up heater core. If that is fine, check to be sure the engine is getting as hot as it should. A stuck open thermostat will not allow the coolant to heat up enough and not blow hot air. If all that is good, check the blend door under the dash. It may be getting stuck in between the hot cold positions and not allowing all the air to flow over the heater core.

Posted on Dec 12, 2012

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Posted on Jan 02, 2017

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SOURCE: Heat or air only comes out from window defrost.

try changing your whole heater switch unit that should work

Posted on Dec 09, 2008

  • 2920 Answers

SOURCE: air conditioning and heating

have the water pump checked out, i had a van that did the same thing and founf i had a bad water pump it fixed the problem.also check the blower motor to make sure its working right by tapping on it while you have the car running. the car will survive dont worry its going to be one of those two things im pretty sure.

Posted on Jan 08, 2009

  • 20 Answers

SOURCE: Heat wont blow through heater or defroster vents

common problem, check under dash by the gas pedal if control arms are muving went selecting from ac to heat cuz this it is the control for the vents to go from ac to heat and to defrost.

Posted on Feb 23, 2009

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