Car Heat Not Working? Engine Overheating? How to Diagnose Cooling System!

Is the heat not working in your car or truck? Or maybe the engine is getting a little too hot? Believe it or not, those have the coolant system in common! In this video, Sue shows you how to diagnose problems with the cooling system, like heater core clogs, leaks, and bad water pumps, by walking you through the steps from easiest to most complicated. If there is trouble brewing in your cooling system, check out this video!

Check this playlist for more great diagnostics that you can do yourself at home!

⚠ DISCLAIMER:
While 1A Auto strives to make the information provided in this video as accurate as possible, it makes no claims, promises, or guarantees about the accuracy, completeness or applicability of the content. No information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. All do-it-yourself projects entail some risk. It is the sole responsibility of the viewer to assume this risk. 1A Auto is not responsible or liable for any loss damage (including, but not limited to, actual, consequential, or punitive), liability, claim, or any other injury or cause related to or resulting from any information posted in this video.

[AAuto]

√ *Watch the Video*
√ *Do it Yourself*
√ *Save Money*

[nickaa]

I'd love to see you gals and guys do an in depth video on flushing the heater core and flushing the cooling system

[LongTimeTTFan]

Very informative. Great step by step diagnostics problem solving process. Thanks a lot.

[charrasabram]

Love to see other women and like myself work on cars!!

[mckoylach]

Great step by step diagnostic procedures...

[Rootropday]

Coolant levels good. If I have the heat on my engine coolant hot light comes on. If I turn the fans off it goes back to normal. Even with my air turned off tho if its in the hot position it blows out small amounts of hot air, and if in cold position it blows out some cold air. My mechanic said it might need new head gaskets but hes not sure if that is even going to fix the problem. Cars are soooo stressful.

[abelmorales]

Would this cause the temp gauge in dash to go way up? I have a 2012 Traverse. Having overheating issue. Replaced the thermostat. Replaced broken radiator cap. Replaced water pump. I did not burp the system. Only topped off with one jug of coolant into radiator. And topped off the reservoir. Now heater isn’t working and still gauge is going way up as of overheating.

[kevinm]

Great video. My favorite mechanic on your channel.

[stisraelitessweetness]

I'm having this problem, and it's the wrong time of the season 😒

[jackvalley]

Great job explaining. My 2006 Honda Element and myself thank you. My element just had the cat converter and O2 sensors ripped off, and I don't have a garage. Any new ideas what may be helpful to stop these thieves, other then the same old products everyone is trying to make some money on?

[mobilecommunicationsnetwor]

Could you chemical test the head gasket? Results?
Or did the sealant invalidate this type of testing?

[pk-fbyr]

One video and I'm hooked. Good info👍

[danielheribertozamorarange]

Does the crv 2008 have that heater control valve?

[MrFernando]

Have 2015 ford taurus no heat. have upper hoses hot but lower hoses cold to radiator dealer wants 2800 to change heater core and coolant flush. Heat comes out at 3000 RPMs is this the correct diagnosis?

[tonydiablo]

I love your accent! Rock on! Thank you for the video.

[Bonbonbon]

My 2001 Nissan sentra started both heater hoses had a hole and were leaking so I replaced them. Now my car overheats and I tried burping it yesterday while I was on an incline and the heat did kick on, but that was the only time. I have not had heat since then. It still overheats as well. Once I go like past 5 miles I try burping it like five times. I don’t know what the problem is. There’s nothing leaking now.
ONLY overheats with the radiator cap on.

[mtall]

Good video. My Chevy Trk has an intermittent fan problem. I cannot figure out how to access the dash to test the a/c&heat controls. Do you have any videos on that.

[mobilecommunicationsnetwor]

What would the Scope of work be to replace the head gasket?
Labor time? Parts costs?
What do you think could have caused this failure?

[mickcarson]

Does this channel respond to questions in comments? I left a comment a few days ago in another video about the removal of the left mirror and wanted to know if I could dismantle the mirror to check why it doesn't fold anymore, do I need to replace it with a new one? So far nothing

[pearlrival]

shouldnt the inlet and outlet radiator hoses have more of a variance than 5 degrees?