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!

Its 50 years old this year! Only half the evaporator is getting cool/cold Top half is room temp Ive never put in refrigerant in the 28 years Ive lived here. Its R22, and I have some It has no piston, no txv, just a fixed tube/capillary system Soooo... is it just low after all these years? My house is about 82 degrees, out of the vents is about 72 degrees. But, how do you know how much to put in? Ive heard the old "beer can cold" analogy, which tells me nada Dont want to overfill it. Ive done auto ac's since the 1970s, have gauges for R22, just not sure what to do here, cant afford to replace it, and love its simplicity to be honest. I imagine if its a leak its a sloooow small one. Could be a schrader valve, hose, connection etc, or maybe something more serious, but want to try adding for now and see the results. No one can first believe this system is 50 years old, and most start talking about pistons and txv valves, which dont exist, which they also dont understand or believe. All the techs Ive talked to have never seen much less worked on a system this old So how to add and not overfill? I should add Im in Florida, its been in the upper 90s with heat index in the 106 degree feel like, with 80% humidity. So Im sure its struggling, Ive lived around here since 1977 and this is the hottest and most humid Ive ever experienced. Amazingly, typically my ac in the summer spikes my bill into the mid 200s, now its hit mid 300s for the first time. 1600sf house, 3 ton unit On another need, what is the absolute safest cleaner for the evaporator? It needs a cleaning (not that bad, just want to do it) and Ive read some cleaners are caustic. This evap is old so I want something that cleans but is completely safe for it Thanks

Hello everyone, I'm curious what kind of quotes you guys have gotten for a new hvac system? Im in a smaller town in Wyoming and i recently got a quote for 18,000 to replace my gas furnace and air condition with what seems like a pretty basic system. I really cant afford to spend that much. I feel like I can tackle this myself so I just wanted to get some advice. I appreciate this guys channel and it has helped me to keep my system going the past several years, but its looking like its time to replace! Any input would be much appreciated. Thanks!

Howdy Folks! We have some very exciting news! In the coming months, we’ll be launching the official DIY HVAC Academy. This academy will provide highly detailed instructions and videos on how to plan, implement, and optimize your HVAC replacement. Many people are hesitant to undertake this task, but we’ve successfully assisted dozens of individuals in doing so. The DIY HVAC Academy will be a comprehensive and structured resource, including workbooks and checklists to guide you through each step of the process. We’ll announce its availability once it’s ready. You’ll have lifetime access to all the modules & workbooks, and the first 200 sign ups will be discounted at $299.00. We will make another announcement here as well as our youtube channel once this resource is live! Thank you so much for your support! Dave