Love the channel..I am a DIYer but have not attempted replacing a system/unit so my question is i have a 15 year old Lennox. Still cools here in hot Georgia but where do I need to begin when this thing starts to give up the ghost? Appreciate any input....

I've watched a lot of your HVAC videos. I've learned so much from your channel that I now feel confident I could replace an entire AC system myself—and do it the right way. When I inspected the original system that came with my house, I discovered it didn't even have a filter drier installed. Amazingly, it still worked for more than 25 years. Eventually, it developed a refrigerant leak because the liquid line was rubbing against the brick where it exited the house due to vibration. I was able to repair the leak and install a filter drier because of what I learned from your videos. I really appreciate your enthusiasm for teaching and the time you put into creating such educational content. Keep up the great work!

Hi, we have a situation with our 8 yr old ac unit. It stopped cooling and I called an older hvac technician that we had used on another property. He came out and looked at the condensing unit and said the caps were loose on the high /low lines and as a result we lost most of the freon. We paid $800 for the freon and trip charge. Well about a week and a half later it quit cooling again. (We are in Dallas in the midst of a heat wave) We called him out again and he said the board red light code said the board is bad. He ordered a new board and came out again to install it. Then it had a yellow code I think, and this is where it gets murky, I don't really know what the reason is (I'm not sure he knew either) Anyway apparently the unit is low on freon again and he said there must be a leak somewhere. So Wednesday 7/29 he's supposed to come again and put dye in the line and try to find the leak, but we will have to pay for more freon - potentially another $800 which we don't really have because we've lost our main jobs and are doing side gigs to pay bills. Shouldn't he have checked the lines with the dye the first time to cover all the leak possibilities? to avoid this thing from happening. We think he should refill the freon on his dime from his negligence to check all possibilities the first time instead of assuming just the caps were at fault? We'll be happy to work with him for his time (he charges very reasonably), but freon is horribly expensive. What do you think? We thought about calling out the company that originally installed it because the parts are still under warranty, be he said their labor cost would be 3-4x his labor cost and therefore still more expensive. But there is trust lost from them leaving the caps loose to speed up a freon call back.

I’m looking for some advice on a strange issue with my approximately 30-year-old central HVAC system. When I lower the thermostat by 1–2 degrees, the air conditioner will run continuously for a very long time before it finally reaches the new set temperature. For example, if I change the thermostat from 76°F to 75°F, it may eventually reach 75°F, but the AC keeps running even after the thermostat shows it has reached the set point. I’ve also noticed that the house feels much colder than the thermostat setting while it’s still running. The really confusing part is this: if I then raise the thermostat back up to 76°F, the AC immediately shuts off—even though the thermostat may now show the room temperature is 73°F. That doesn’t seem to make sense to me. Has anyone experienced something similar? What are the most likely things I should check or have inspected? Could this be a thermostat issue, a sensor problem, an airflow issue, or something else? The system is about 30 years old, but it still cools the house. I’m just trying to understand why it seems to overcool and why it won’t shut off until I manually increase the thermostat setting. Any advice or troubleshooting suggestions would be greatly appreciated. Thank you!

I know, why do a construction permit? Well, I live in NJ, and things get tricky when trying to sell. My permit was easily approved (I gave them my EPA 608 cert), but now I want to know what the inspector will be looking for during inspection. I also want to do it right. I am replacing my 28 year old 2.5 ton central AC condenser and evaporator only with a new heat pump setup. Since I have extra solar electric available, I want it to heat my home using the heat pump, keeping the propane as backup for the really cold nights. Keeping the older propane furnace in place as my air handler. I will install a dual fuel board from Goodman, as well as the Firefly R32 leak monitoring. New unit will also be 2.5 ton single speed as this has worked well for me. What will the inspector be looking for? I'm guessing I will have to downsize my 30 amp 2 pole breaker to be no larger than the new units spec for "Max. Overcurrent Protection" (which is 25). Will they be looking for matching AHRI Certificate? What else, or other tips to share for inspection?