Air Conditioner

by Larry in Woodbridge 10 months ago

Last year we replaced our old AC unit with a 3 tonne Payne. The house is 2 stories, 2,900 sq. ft. The unit provides cool air but it isn’t removing the humidity (and never has) Normally the dehumidifier in the basement (set at 50) will require emptying every 18 – 24 hours but when the AC is on, the dehumidifier needs to be emptied every 3 – 4 hours and the humidity level never gets below 60.
The installer said this was “normal”.
What might be causing this and how is it repaired.
Thanks for your insight.

by Paul from Ewog Renovations Inc. 9 months ago

Classic case of over-sized AC. Installer is correct in saying that it is normal that an over-sized AC unit will result in a cold, humid house. The thermostat calls for cooling, AC starts-up, the house temp is dropped to the setting of the stat and shuts-off. Only this happens before it has run long enough to de-humidify the house – because the AC unit is over-sized. Solution – smaller unit and don’t use the original installer.