she had a 3 ton 410 aruf goodman (not a hp) put in (meaning put in the central closet but not hooked up) this past february but wasnt charged up and running until her house was finished 2 weeks ago.
When the thermostat clicks to turn the unit on, the air handler sounds like there is something else fairly quiet starting inside it for maybe 2 seconds then the blower fan will start up. That normal or what could that be?
Then when the unit shuts off you can hear a gas hissing sound for maybe 5 seconds and the blower fan slowing down until it stops. That normal or what is that?
Other than that the unit cools and runs perfectly and is very quiet, 20-22 degree difference between what comes out the closest ceiling vent and what goes in the supply grill and strong air flow out the vents.
Told her i would post here for some opinions before she got the installing company out to ask the questions.