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Car heater blows cold air when not driving?
Common causes include low coolant, air trapped in the system, a thermostat stuck open, or a weak water pump. When you’re driving, the engine spins faster and moves coolant better, so you get heat. At idle, that flow drops, and the heater turns cold. At Stewart’s Automotive of Sacramento, a driver came in complaining the heater only worked on the freeway. The inspection showed low coolant from a small leak, and once that was repaired and the system topped off, the heater stayed warm even at stoplights.
Heater blowing cold but car not overheating?
faulty control valve on heater or air in the lines
Why is your car heater blowing out cold air when it is on?
Low coolant and a clogged heater core are possibilities.
My car is blowing out cold air not hot when the heater is on.?
You need to change your thermostat in the car.
Why does car heater get cold at high rpm?
open or missing thermostat
When a car thermostat does not work properly can this make your car surge when you go to acclerate if heater is on full blast in a cold car?
No
What does a block heater do for your car?
A block heater is a device one would use to heat the engine of a car in extremely cold weather. The block heater can be mains generated or will run on the fuel source of your vehicle.
What is a block heater?
Is an electrical device used to heat coolant of a vehicle at extreme cold condition for easy startup.
Why would a car heater be blowing cold air?
AnswerBad thermostat, clogged heater core, or a defective heater control switch. If an engine has not been running long it will not have warmed up, the warmth from a car heater usually comes from the engine.
Heater starts to turn cold when at stop light - what causes that?
The #1 cause of cold air from the heater when the car is stopped, or the engine is idling, low engine coolant levels.
Why will a car heater blow out cold air when heater is on?
Low on coolant, stuck open thermostat, plugged heater core, faulty temperature blend door,
How long should a car heater take to warm up?
How long it takes a car heater to warm up depends on the temperature outside. In cold weather the heater can take several minutes to warm up.
