Skip the auto shop - Our mechanics make house calls

Q: Why is my car heater blowing cold air? I start my car, give it a few minutes and the heater never heats up.

asked by on

Why is my car heater blowing cold air? I start my car, i turn on the heater and i give it a few minutes but the heater never heats up.

My car has 110000 miles.
My car has an automatic transmission.

The lack of heat being generated by your system may indicate a clogged heater core. The [heater core]((https://www.yourmechanic.com/services/heater-is-not-working-inspection) is a small radiator like unit that circulates the hot coolant from the engine through the heater core which then uses this warm coolant to heat the inside of the car with the help of the blower motor that blows the warm air through the vents inside the car. The other possibility is that the thermostat may not be allowing the engine to reach a normal operating temperature and since the engine’s warm coolant is the essential source of the heater core supplying heat to the inside of the vehicle, this can impact the warmth of the heat inside the vehicle. I would suggest having an expert from YourMechanic come to your location to diagnose your heating system.

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. Why is my car heater blowing cold air? I start my car, give it a few minutes and the heater never heats up.

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: Need to reset or bypass the anti-theft system. Everything works just won't start.

Hi there. Try removing the battery cable for 13 minutes and operating everything in the car with the battery disconnected. Then when the battery is connected, reprogram the key fob remote to the vehicle and unlock and lock the drive...

Q: My turn signal is broken.

Hi John. The turn signal indicator is a complete unit, that has internal springs and gears to control the action of the indicator. If something internal is broken, replacing the entire housing and indicator is the solution.

Q: What tips should be followed for wearing seat belts properly?

While seat belts might seem like relatively self-explanatory safety devices, it’s actually pretty easy to use them incorrectly. Doing so can seriously reduce your safety and even put you in greater danger during an impact. Follow these tips to wear...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...