Skip the auto shop - Our mechanics make house calls

Q: Heater not heating

asked by on

The heater is not heating up. I think the radiator needs to be replaced.

A: The heater needs for the engine to be warm,...

The heater needs for the engine to be warm, and the temperature blend door to open, in order to direct heat to the passenger compartment from the AC side. If the radiator was plugged, then the engine may be overheating. The thermostat may be stuck open, preventing the engine from getting warm enough. I recommend that you have a mechanic, such as one from YourMechanic, do a thorough check of the cooling system and AC heat 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!

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: Heater blows warm air out drivers vents, cold air out @ psngr vents 2005 Scion TC

Hi there - I suspect you have a problem with the air blend doors inside your heater unit in the passenger compartment. These doors control air flow inside the passenger compartment. A failed or stuck air blend door would result...

Q: My car keeps blowing oil sending units

Hi there - I suspect you have a blown head gasket. Having coolant in the oil is a classic blown head gasket symptom, and having very high oil pressure means combustion pressure is being leaked into the oil passages. This...

Q: Can I put a blow off valve in my car?

If I am understanding your question correctly, you are wanting to install a blow off valve on a non-turbo charged car. A blow off valve is typically only necessary in turbo charged applications as it's function is to to release...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...