Skip the auto shop - Our mechanics make house calls

Q: Heater blows cold

asked by on

The heater blows cold air in cold weather.

In very cold weather a vehicle may need more time to heat up before hand to help start the car efficiently. In some cases old or low coolant levels can affect the ability your vehicle has to produce sufficient heat. A cooling system diagnostic can be performed to ensure that the cooling system holds system pressure and to make sure that there are no leaks. If your thermostat is stuck open, the coolant is constantly recirculating and never gets to heat up.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Heater blows cold

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: White smoke coming from the water pump out of radiator hose outlet

Hi there. Assuming, proper procedure was followed replacing the head gaskets. The original cause for overheating must of been overlooked. The thermostat stuck closed, the radiator restricted, the radiator cooling fan(s) inoperative. The cylinder head and/or cylinder head gasket issue...

Q: My truck has a knocking noise from a bad lifter

A bad lifter will not make a knocking noise. It will make a tapping noise. I would recommend having a qualified mechanic listen to the noise to see if it is a lifter noise, a piston rod, or main bearing...

Q: What type of rotors

Hello! They added metallic brakes on the front to give the front more stopping power than the rear, which is great for stopping during sudden braking. It will be beneficial to put slotted rotors and performance pads on the van,...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.