Q: Plugged heater core

asked by on

If i flush my heater core am i asking for more problems, like a leaking heater core

My car has 140000 miles.
My car has an automatic transmission.

Hey there. The heater core may burst if you use too much pressure to try and purge the core of blockage. The core gets blocked from using the wrong fluid in the vehicle. The coolant will get all brown and clog the radiator and heater cores. You can try and flush out the excess but it still may not unplug the core. You can try and remove both lines to the core and run a hose through both directions. This may remove more of the blockage. If you need getting this taken care of, a qualified pro from YourMechanic can come to your car’s location to diagnose the coolant leak and let you know what needs repair.

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. Plugged heater core

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: Q: Coolant leaking from car

Hi, I would check inside the engine bay for residue, mainly around the water pump and on the motor itself. There are seals that can leak slowly over time making it difficult to find the source. You can also check...

Q: My a/c intermittently blows warm and cold air.

It is possible that your blend door actuator could be failing and going back to the default position. Many vehicles will default the blend door to heat mode. When the blend door actuator fails, it will automatically revert the door...

Q: Advice on cooler additives

Some of it is "snake" oil (that doesn't work) and some of it works to some extent. Realize that the best cooling is water. Water has specific heat and cooling. So water actually cools better than antifreeze. But of...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...