Q: Heater not heating

asked by on

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

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?
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 not heating

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: No air flow in a/c or heater

If neither the AC or heat blows, the problem is with the blower motor or its control circuit. In your vehicle, the blower circuit consists of the heater fuse, gauge fuse, heater relay, blower switch, blower relay, and blower motor....

Q: Green light flashing around D4 indicator

When your transmission D4 light is blinking, this means your transmission has stored a code. The code would need to be retrieved and diagnosed to see what the problem is. These transmissions were pretty reliable, but had problems with the...

Q: a couple of times (twice over a two week period) I've had difficulty starting my car. the ready light would not go on

Hi there. For your assurance I am a former Toyota Master Hybrid certified technician. There is no starter on the hybrid vehicles from Toyota. These vehicles start the engine only when necessary and that is determined from driver and load...

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...
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...
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...