0
There are several reasons for your heater to blow cold air, the heater belnd door being stuck, no thermostat, low coolant, diagnosis is key.
If you have a 3.1 V6, you may need to bleed the coolant system. In front of the engine passenger side, you have a bleeder screw, with the engine off, surge tank cap off, open the valve until coolant flows smoothly, close the valve, check coolant, add if needed.
it's a $5.00 thermastat The problem could also be low coolant level. If the coolant gets too low it will not pass through the heater core and therefore will not heat the cabin air.
You may need to have your heater box inspected. It is possible for the flapper to be jammed or broken. It is a big fix so make sure to check coolant levels and leaks as well.
Add your answer:
Earn +20 pts
How can you tell if heater blower is not working?
it wont blow heat itll blow cold air
Why would a house heater blow out cold air?
It doesn't really blow it out it just warms the cold air.
Why would you smell antifreeze and heater blow cold air?
heater core possibly plugged and leaking
Would straight antifreeze make heater blow cold air?
No! Thermostat.
Why would a back heater blow cold air and front heater blow hot air in a 2003 Chevrolet Suburban?
The front expansion valve is clogged.
Why would heater blow out hot in the summer and cold in the winter?
Could be a bad thermostat.
How will the heater react if the heater core is stopped up?
Your heater will blow cold air only.
Why does heat in 1998 Dodge Grand Caravan blow cold?
Low Coolant? Bad thermostat? Heater core plugged or restricted? Heater core airbound? Heater control cable not working?
Why does your heater blow out cold air?
Do you have a heat pump or Gas Furnace? With my car, it was Heater matrix clogged with radiator sealant. The workshop cleaned it and it's start working fine!
Why does your heater blow cold air only?
bad engine thermastat With my car, it was Heater matrix clogged with radiator sealant. The workshop cleaned it and it's start working fine!
Why would cold air blow out when you turn on the heater?
engine not warm, low coolant, or stuck thermostat
What is causing the heater to blow cold air in 2002 Mercury Mountaineer?
you would have to see a mechanic about that problem
