Symptoms of Overcharge

Bryan examines Symptoms of Overcharge in another video exploring HVAC fundamentals.

Read all the tech tips, take the quizzes

[Wdbx]

I am an engineer, and I'll say the complexity on trouble shooting an HVAC requires an expert technician like you.

[rbnhood]

Dude you are meant to be a instructor. You are the most knowledgeable guy I’ve ever listen to.

[hvac]

Thank you Bryan, 15 yrs in the trade and still find your vids informative.

[jeffshore]

Brian, thanks for all the videos. As an HVAC/R instructor, I use quite a lot of them in class as well as on Teams. It certainly is useful to have additional information from Professionals like you that know not just the technical material, but also how to present it in ways that make it easy and interesting to understand.

[misaelmorenoluna]

You are an excellent teacher/instructor!! I am becoming more and more familiar with these measurements and diagnostics approaches, and every system is going to be different depending on the condition of the equipment.

[dieselchevette]

Excellent video. A/C only tech here that now designs stuff as an engineer in the field. Excellent video, and a great point about "stacking" refrigerant. Subcooling vs superheat charging is something green techs can't seem to sort out which one to do. Gotta make sure the filters are clean and the airflow is good if your suction is low, regardless of SH/SC. The basics first, then gauge up. I keep seeing measure quick in these vids and the electronic probes. They seem to be worth it more and more, even if I would only use them once in a while in place of my manifold and thermocouples.

[bruceanderson]

Thank you for the information and the quick-sheet. I was able to easily print it.

[Grinderluke]

Can you talk about how systems run in 110 to 120 degree temps like it gets here in Yuma Arizona. Often times you will get to a call and everything is working properly but if you wait a few hours you'll see the condenser fan motor quit from overheating even if the amp draw is very well within range. Many many failures in such extreme heat.

[kenward]

Great job! I really like these videos.

[etlawson]

I had an overcharged unit after someone fixed it by clearing the T-stat. It was going to 625 psig. I recovered until I hit about ten degrees subcool. The compressor ran quieter and the homeowner was happy.

[LichaelMewis]

How can I check a mini split/heatpump inverter system if its been overcharged? It has a TXV but how can I check sub cooling on a mini split system? Or what is the best way other than reclaiming the refrigerant and weighing it?

[briangc]

You forgot to mention the importance of proper airflow across both coils and the importance of having clean coils. I have seen systems with dirty coils that the previous tech assumed was undercharged and he added freon. He then added more freon. He then added even more freon. When I got the call, the reversing valve had hydrolocked and the unit would not go into cooling mode. I pumped out 42 lbs of freon from a system that the factory charge was 14 lbs; 28 lbs overcharged! I cleaned the coils and weighed in the charge and voila, the system worked perfectly for a couple years after. You should also mention that the ONLY 100% foolproof way to charge a system is to weigh out and weigh in the charge. It takes less time to weigh out and weigh in than it does to take a bunch of temp readings, add a little, wait for pressures and temps to stabilize, take a temp reading, add a little, wait for pressures and temps to stabilize, take a temp reading, etc. I've been a licensed HVAC contractor for over 22 years and weighing out the old charge will tell you as much or more than all those readings and do it in less time. The new guys are leaning too much on technology, aka apps on their phones, when the engineers who designed the system have already done all the hard work. Our job is simple when you stick to the basics.

[tedlank]

outstanding good job bro.. I learned something today..

[Sam-dbeg]

Good Stuff new in the field, very helpful

[ramsis]

Your advice was pretty cool, I will look forward for more Sir, god bless HVAC school

[kobie]

Thank you for this very detailed information 🙏🏾💯

[michaelcostello]

Can you do some real life fault finding videos where you demonstrate the measureQuick app on your phone. Thanks

[ronyben-nachum]

wonderful. Thank you very much. Very helpful

[KevinKesler-rmbp]

How can we measure the airflow in a walk in evaporator ?

I have manometer, psychometers, a Testo 420 flow hood, and all the toys with mQ

[KarlAlfredRoemer]

If i 've got it right, i need 3 pressure gauges and 7 thermometers: 1 PG ant 1 T in front of the TXV for subcooling, 1 PG and 1 T in front of the compressor for superheat, ohne PG behind the compressor for head pressure, 1 T in front of and 1 T behind the condensor für Delta t (condensor) 1 T in front of and 1 T behind the evaporator für Delta t (evaporator). For 3 pressor gauges, i need 3 schrader valves. Right?