Skip the auto shop - Our mechanics make house calls

Q: Heat blows cold when the car is idling

asked by on

My car has gone around 95,000 miles. When I drive and stop the car and it's idling, the heat would start blowing cold. What can cause this?

A: Hi there. The coolant level should be check...

Hi there. The coolant level should be checked first as low coolant will cause this. If it is low then it may have a leak that needs to be found. If the level is fine then the heater hoses need to be inspected for restrictions or it may be the water pump failing and not circulating coolant. If you want to have this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose what’s causing the problem.

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

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's air conditioning/heating system only works for a brief time and blows the wrong temperature air

Your Villager comes equipped with either an automatic climate control system or a manual controlled climate system. The automatic controlled system uses four separate sensors and as many modules to operate. Any of these can be the source of the...

Q: Only getting luke warm heat out my vents

Hello. The heater is a part of the vehicle's cooling system and uses the same fluid. The first thing I would do is check to make sure that the system is properly filled and bled. If any air gets trapped...

Q: Could my compressor be affected by a bad thermostat? 2007 Infiniti M35

The thermostat should not affect the A/C compressor blowing cool air. The thermostat regulates the flow of the coolant in your car's engine and controls when the coolant flows in and out of the motor from the radiator by opening...

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...
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...
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...