Hi gang.. Went looking for help on the Internets and ended up here.. Thanks for any time put into reading this. My AC keeps running pretty constantly, so had a pro from dover come out to take a look. The house gets colder than the outside, but nothing amazing. Here's my stats:
On the outside.. I've got a 2.5 ton Puron R410 by Carrier, about 5 years old.
On the Inside, I've got an older R22 3 ton coil, from about the year 2000.
The house is big enough to warrant a 3 ton unit, I have no idea why the outdoor unit got seemingly replaced, or replaced with a smaller unit.
The air coming out of the outside fan isn't very hot, the air inside the vents gets down to about 65 degrees, though the outdoors are only about 10 degrees higher, so not hitting the 20 degree difference model.
Haven't had the house that long, so treating everything as an unknown, even if it was done right. As part of that, had a recommended HVAC tech come out. Given they are two different freon types, just to make sure, the tech drained everything from the line, put new coolant in, and replaced the filter. He also removed a jacket wrapped around the fan motor (blew me away).
He then checked out the indoor part, and recognized the 3 ton coil. He said it was a mismatch, and the coil wasn't getting as cool as it needed to because the outdoor unit can't keep up. He recommended I goto a 2.5 ton coil, or a 3 ton outdoor unit, to increase efficiency of the system.
So, the AC doesn't do too bad, it does turn off eventually, but it's 22/24 hours on and pumping. From other posts I've read, it seems like you *can* have the mismatch in some situations? Seems like mixed posts about it.
And I'm still trying to figure out what a Thermal Expansion Valve is, and if I have one. It seems recommended?
Thanks fellas! I'm still learning and don't know what I don't know... Hoping you do