Q: Heater doesn't work correctly

asked by on

I have a heater malfunction in my car. The vents are not blowing warm air. The car hasn't been overheating. I had the coolant checked and it is at an appropriate level. What should I do?

The most likely cause of an inoperative heater (aside from low coolant) is a faulty thermostat. Hot engine coolant flows through the heater core. The blower motor blows air over the heater core and into the passenger compartment to warm the vehicle. If the thermostat is stuck open, the engine will never reach operating temperature and the coolant will not get hot enough to warm the interior of the vehicle. If the thermostat is OK, the next place to look is the heater core itself. I suggest you take your vehicle to a trained professional to have your heating issue diagnosed and repaired. The team at YourMechanic is an excellent option since we make house calls.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. Heater doesn't work correctly

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: My car is over heating and the coolant is running out fast.

This can be caused by a number of things such as low coolant levels, a faulty thermostat, a clogged radiator or a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant...

Q: Fan blower motor not working replaced resistor and blower motor but I don't know we're the fuse or relay is located

The fuse and relay is in the power distribution center which is mounted under the hood on the left side of the engine compartment. Remove the top cover and look on the under side of the cover. You will see...

Q: Chevy captiva 2014. A/C running warm. Will not recirculate. And even though I have it on face vents, it blows thru them AND bottom

Hello, thank you for writing in. The vehicle is likely having more than one issue at once. The blend doors control the flow of air through the vents and the cabin. If they are unresponsive, you may have one of...

Related articles

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.