spot on nice to see an honest man doing a first class job greeting from a welshman working in london.

I was a tech before these newer compressors (80's) and had to learn about them after my Hyundai Tuscon had a cooling issue with high low side pressures. I chased it until I found these type of vids. Replaced the valve and it brought the pressure back to normal and cooling was back to normal 46 degrees after being stuck at 60 prior. Thanks to you for doing these!!!! Saved me a ton of money doing it all myself.

Another visual check is to see how clean the condenser is. I just did one that was almost completely plugged with bugs dirt dust cotton etc. I actually pulled the radiator out (didn't want to crack the AC unless absolutely necessary) so I could thoroughly clean all fins on both. Starting pressure 30/270 @80. When cleaning was done it was 37/175@ 77 blowing a nice 42 in the cabin now. If I hadn't thought to check and clean it, I would have done a orifice, dryer, and flush, and I doubt it would have fixed anything.

Brian came a long way and really knows his trade! I’m Very Proud of His Accomplishments. Your Old Neighbor in OL.

Awesome guy!! I have learned more from you in these 16 minutes than I have learned all my life about air conditioning. Keep up the great work!!

I had a ford escort that the dealer wanted to charge me 1300 dollars to fix. I said no and took the car home. The dealer said i needed a whole new ac system. I started troubleshooting the problem myself and all i needed was a cycling pressure switch for 18 dollars from Napa. I fixed myself and i was happy as hell.

That makes a lot of sense. I can picture it in my head now. Very interesting and effective diagnosis method The compressor's inability to "pump" refrigerant from the suction side causes a backup that increases the pressure, and impedes the condenser from releasing the heat; High suction pressure, poor cooling, voila! Brilliant, live and learn!

I just replaced my compressor myself because i had the same problem. It definitely fixed my problem.

Love this guy he is such a honest mechanic.

Nice! Work… please mention to always check the cabin air filter and evaporator general condition for foreign materials! That shall be a line item on the troubleshooting process!

Excellent presentation! Kept wanting to skip ahead but couldn't because every word was worth listening to. Cheers!

13:30 I'm glad you made this distinction clear. the electronic valves like this one are lesser known and studied by most.

Wow, exactly the thing I'm looking for! I suppose this is my issue now, when at idle the cooling is not as good as when I rev the engine. But when I rev the engine, the pressure on the low side is at 50, 52 which is way too high, while on the high side is at 200, 210. (mine is BMW E90)