How to Flush a Heater Core (Fast)

Is your heat not working or is your heater not hot? You may have a clogged heater core so do a heater core flush and unclog it. Learn how to flush your heater core and get it working to full capacity again instead of spending hundreds on a replacement!

Here is the cheap flush kit I showed: http://amzn.to/2mXrqcx
Here is the Thermometer I used: https://amzn.to/3bjDlIJ
Hose adapter: http://amzn.to/2maFdhe
AntiFreeze: http://amzn.to/2maOF49

How to find why you have No Heat: https://www.youtube.com/watch?v=-XjXTVJhFLM
How to Test your Coolant to See if it is Bad: https://www.youtube.com/watch?v=mHTM3dvpD1M
How to Flush Your Coolant: https://www.youtube.com/watch?v=s–5ft5YiHg
How to Replace a Blower Motor Resistor: https://www.youtube.com/watch?v=Q-i0tytSYIM
How to Replace a Blower Motor: https://www.youtube.com/watch?v=7e60wS3_C9s
Here is the longer heater core flush video: https://www.youtube.com/watch?v=LD2LGkUycQg

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Disclaimer:
Due to factors beyond the control of ChrisFix, I cannot guarantee against improper use or unauthorized modifications of this information. ChrisFix assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. ChrisFix recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of ChrisFix, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not ChrisFix.

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34 thoughts on “How to Flush a Heater Core (Fast)

  1. Hey man don’t know if you’ll see this but I can across the video because I’m getting a sweet smell, my heat is not hot, smoke coming out of my vents and condensation from the windshield vents as well. Would you recommend still doing this if there is a possible leak within the heater core? Because I am unsure if the heater core is clogged or if there is a leak within it. Got quoted 1600 to replace the heater core and was going to try this before I go ahead and do this and spend the 1600 for a brand new system.

  2. Hey well my car is burning coolant but I’ve change the oil and anti freeze isn’t in the oil so my only thought is the heater core I’ve already replaced all the cooling system except for the heater core so I wonder if I flush it would it solve my problem or should I just replace the whole heater core

  3. Always great advice Chris really appreciate your videos wish I still had my dodge ram this was one of it's problems. Besides rust problems thanks again keep on keeping on Chris!!!

  4. One word of caution. Try to be as gentle as possible when removing and reinstalling the hoses. Even brand new, heater cores are real fragile. And they can be a blazing nightmare to replace.

  5. Okay I've replaced water pump and flushed the core and I still don't have hot hot heat if that makes sense. My temp gauge reads normal so I don't think the thermostat is bad. Any ideas

  6. I try this on a Chevy Express van 2008 my water pump was bad and I replaced it and I want to try to flush my heater core and I ran the heat it was way better

  7. Just performed on my 2008 Durango flex Fuel, had to hold the hose high up as the inlet and outlet are facing down. Let gravity do most of the work. Very straight forward and now have rear heat again

  8. Chris quick question, I have a Mazda cx7 2008 and recently the windshield has a lot of condensation on it and the smell of antifreeze inside the car. Is this a heater core replacement issue or a possible leak? Thanks

  9. Hi Chris! I tried to follow these steps but am struggling removing my hose. It’s stuck on there. Do you think it’s a bad idea to pour some hot water over the hose to maybe help loosen it up then try to use a pick?

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