I'm not happy with the performance of my Carrier 2 speed top-of-the line a/c. I'm convinced the unit was not sized correctly. I have a 3 ton. My understanding was that the unit would have long run times on low and kick into high on extremely warm days. The problem is that I hardly ever see the unit run on low. It usually runs on high even when the outside temp is less than 78 and the set temp is 73. The result is an uncomfortablly low RH.
Tech came, never seen a 2 stage a/c, (did/t even believe me when I told him I had one). Says everything checks out but wanted to replace the Infinity T-Stat. Again, because he has never seen one, let alone understand it, he expects it to act like a "traditional single stage a/c and thermostat" ie. set temp 73, a/c kick on at 74 , turn off at 72. I had to explain to him how the thing works. Anyway, I did'nt allow him to change it because I have no confidence in his ability to hook it up correctly and as far as I'm concerned, it works fine.
I don't think a proper heat load calc was done, taking into account our very unique floor plan (raised bungalow, raised by full story), 2 story foyer (heat trap) and our many oversized windows.
How do I get an independant heat load calc performed? Are my expectations out of wack. Is 77 degrees considered extremely warm?
Also have a question re High Cool latch. Set it to 90 to keep unit running on low. Maintained a comfortable RH of 46 and temp 73 so I thought problem fixed. But as the temp started to rise today, unit still kicked into high when outside temp reached 77? Shoud'nt the high cool latch prevent this?