Clarification on upstairs/downstairs; tech coming tomorrow!
My RH problem is downstairs; upstairs is always much better. Agreed that my upstairs unit is oversized, but it almost always runs on 1st stage cooling only. I assume that is because I set the humidity on the tstat to 45%. The RH upstairs is almost always below 60%; 55% on avg.
Back to the downstairs unit. Today the unit ran for 18 minutes to drop the temp by 1 ^F. That's probably about what it runs per cycle to maintain as well. The delta temp was 14^F.
My tech comes tomorrow. Sounds like the order of business is:
1) Have the tech check refrigerant charge/line per udarrell's list.
2) Add duct kit and ducts to the SF A dehu per TeddyBear's list.
Please confirm nobody is recommending to:
1) Increase the size of the return duct/grille on the package unit. I'm at 20x25 grille, 25 ft of 16" round flex for a 3 ton.
2) Change the DIP switches on the package unit to reduce airflow down to 1000 or 800 CFM.
I'll definitely keep everyone posted!
Tech came but nothing new discovered; I discovered floor of package unit is wet
I put a wireless thermometer on the bottom right next to my coil drain pan in the unit. The lowest temperature over a 24 hr period is about 57^F. I assume that's probably a few ^F over the actual coil temp??? The hygrometer on the sensor says 99% :-)
Originally Posted by teddy bear
Tech came yesterday and says there are no refrigeration issues whatsoever. He made a small "tweak" to slow down the blower, but it must have been a very small adjustment. He's sending the ductwork fellow to give me a bid on a mixing box and a second return, and hopefully an increase in return duct diameter to 18". He's out of ideas other than that.
When placing my thermometer in the package unit, I noticed that the floor insulation is wet. No visible water is present, but it's "mushy". This must have been this way ever since my drain pan cracked and was replaced early in the spring. Is this part of my issue? How can I get that fiberglass dried out?