We have a 10-ton external unit coupled to a 'blower' in a closet on the second floor. From what I can gather, the pipes feeding the indoor unit run under the floor and then run vertically to the indoor unit through a wall. Now the problem is that every time the system kicks in, you can hear a 'rushing' noise through the wall carrying the pipes. It's not constant but grows and fades every few seconds. It's loud enough that we have to adjust the TV volume regularly to compensate. I'm wondering if there's anything I can do short of filling the wallspace with foam. Do systems like this have some sort of expander valve in the inside unit that could either be cleaned/replaced ?? Any advice would be welcomed. Gregory Nicholls.
- posted
19 years ago