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Check for vacuum leak either under hood or under dash Check for bad vacuum actuator under dash
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∙ 16y ago
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What could be causing the heat to blow cold and then hot I have a 97 Chevy Lumina?
Could be low on coolant.
How do you fix a heater blower for 1993 Chevy lumina?
I have a 1993 Chevy lumina van that has heat but doesn't have a fan how do I fix the fan?
How do you fix a 1995 Chevy Corsica that will only blow heat out of the vent and not out of the defroster?
Most likely you have a vacume leak under the dash.Check for lines off or broken.They will harden and crack with excessive heat,such as in the engine compartment.
Why does the heat gage of a 1995 Chevy Lumina 3100 engine Car show danger overheating when there is no problem with the engine?
Check actual engine temperature with a thermometer--if in acceptable range temperature sensor or gauge may be defective
1999 Chevy Silverado doesnt blow and heat what is the problem?
if it doesn't heat your heater core is most likely clogged and if it doesn't blow at all then the blower is messed up.
Why would no heat blow from the vents of a 1998 Chevy lumina even after replacing the water pump and thermostat?
The heat/ac switch in that new of a car is controlled off of vaccuum. The hose on the back of the temp. control may have a hole in it not allowing the vents to switch over. An auto a/c specialist can check it out anywhere $30 to $50.
92 lumina and when you turn on the heat or air it will only blow from the floor and defrost it wont blow from the front vents what would cause this problem?
vacuum leak the vacuum reservoir is below the left head light, check the hoses
Why Does your 1991 Chevy S-10 Blow Heat All the Time?
The temp blend door actuator is broken.
Why is there no heat or AC in 1998 Chevy Lumina?
Blower motor probably took a poo, first things first, check the fuses, both in the cab, and dist. Center underhood
Your 1995 Aurora Heat and air conditioning stopped working The fuses are fine but it wont blow any airconditioning or heat?
check the blower motor resistor it may be burned out
What cause your 1988 Chevy truck not to blow heat at all replaced heater core and blen door actuator?
Have you checked your suction lines.
What will cause your 1995 Volkswagen Jetta to blow warm air for heat and cool not cold air for AC?
You're probably out of frion, my friend.
