0
Why does the Heater only blows cold air when car is idle on my 2006 Impala?
Wiki User
∙ 14y ago
check your coolant level in many models the heater core is in the highest position in the water jacket. It your coolant gets low many times a bubble migrates to the heater core, when you raise the rps or are driving around (same thing) the coolant rushes through the water jacket at a much higher speed warming the heater core produceing heat. The other option would be a lever or vacume actuated heater controlled valvel that is spring retun to close, A problem can arise if vacume driven if there is a leak or low vacume the valve will close completely or somewhat. Most likely its low coolant and if you have not adjusted it in a short ammount of time you will blow your head gasket or gaskets or crack your heads costing big money.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
1996 vw sharan heater blows cold cabin hot?
can you please clarify what you mean, do you mean that the front heater blows cold but the rear blows hot or do you mean that when the heating is on cold it blows hot? many thanks paul
Why does heater blow cold at idle only blows hot air when accelerating temperature gauge shows normal Chevrolet Impala 2008?
If the coolant level is okay, I would suspect a restricted heater core. Try flushing the heater core.
Why is the heat cold on a 2006 Chevy Impala?
Low on coolant, Stuck open thermostat, Plugged heater core, Faulty blend door actuator,
If the heater works but blows cold air and heater core is good what do i check next?
Get the air out of your heater core.
Ac works but heater blows cold air?
heater hoses might have been disconected
What would cause the heat to stop blowing in a 2004 Impala?
most likely your heater-core went bad. if you car runs perfectly fine besides having heat. if you car gets up to normal temperatures, doesn't over heat. the fan blows, but just blows cold air. then it is the heater core.
Why would your heat only work on defrost?
ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air? ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air?
Your heater in your jeep only blows cold air why is this?
The most common reason a automobile heater blows cold air is the water level is low. Check the water level and fill to the appropriate level.
Heater problems on ford 1999 expedition?
the heater blows warm air when fan is on low but blows cold air when fan is turn to higher setting
Why does Heater blows cold air on 2001 blazer?
you must have low coolant or a bad heater core
2002 dodge ram 1500 4.7 liter heater not working blows but not hot air?
we changed radaitor & thermastate , now heater blows cold air
Why does your heater blows cold then hot then cold then hot?
It is because your heater is having to heat up so its blowing cold air out while its heating up.This means your heater is not very efficient and it needs to be checked.
