Skip the auto shop - Our mechanics make house calls

Q: Heater core malfunction

asked by on

Yesterday hot water started shooting all over my feet, so I figured it was the heater core? I repaired that, but now the car overheats, which wasn't happening before the heater core ruptured. In your expertise, what is causing this?

When the vehicle begins to overheat after cooling system repairs were done, it is usually due to air stuck in the cooling system. Normally after cooling system repairs, the coolant system is bled of all air, or "Burped". This is done to remove air pockets that prevent the flow of coolant and can cause overheating.

A qualified Technician like the ones at YourMechanic will have little trouble diagnosing your overheating issue for 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

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: Possible carbon monoxide leak in the car?

You will need to have the exhaust system checked at an exhaust shop to see if the exhaust system is also rusted out leaking fumes into the car. If you have floor holes then see a body repair shop to...

Q: No hot air from heaters

This may be due to a faulty heater blower motor or potentially a bad heater core. As you may know, the heater core is a small radiator like unit that circulates the hot coolant from the engine through the heater...

Q: Overheating at the traffic light or while AC is on

You may have a restriction in your radiator or condenser that is preventing the cooling of the respective fluids that go through these parts. Restrictions will cause hot spots and therefore will not allow sufficient cooling of the refrigerant or...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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...