Skip the auto shop - Our mechanics make house calls

Q: Heated core needs to be change

asked by on

When I turn on my car my windows getting foggy and some steam going inside from the stove.Also when I turn heater on,the hot air starts coming after almost 25 minutes.Another thing is on the passenger side on the floor it's wet and looks like it is antifreeze.

My car has 150000 miles.
My car has an automatic transmission.

If you suspect antifreeze in the cabin, a leaking heater core is a possibility. To find the leak, and get the required repair estimated, please request an engine cooling system leak diagnostic and the responding certified mechanic will get this resolved for you. The lack of adequate cabin heat could be due to the heater core being plugged but it could also be due to a faulty (stuck open) engine cooling thermostat. Those possibilities would be considered by the mechanic as he or she evaluates the possible leak from the heater core. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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 dog vomited in my car and now there's a heater vent smell

Hi there - you don't mention the make, model or year of your vehicle, but most cars and trucks now have a "cabin air filter" which filters air re-circulated in the passenger compartment. I would replace this filter, and, while...

Q: Green liquid everywhere

If the coolant is low in the engine and you see a leak near the rear of the engine then the heater core may have broke. You would need to have this verified by having the system pressure tested. In...

Q: Speedometer jumps up/down and van backfires. 1998 GMC Savana

Hi there, thanks for writing in about your 1998 GMC Savana 2500. The speedometer and radio may work together to adjust volume of the radio as the speed increases. The cluster or any of the affected modules may have a...

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...
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...