Noise I installed a new amana 2ton r410a unit from r22 for a friend. The system runs great, cools great and all pressures are normal but where the line set runs through the wall upward you can hear a swishing sound like water in one bedroom and in attic through the liquid line. any ideas on why, or how to quit?

SOURCE: I have a split unit (3 Ton). It is in a new

There could be several things going on here. First make sure filters are clean and check return air duct. I do this with a sheet of newspaper. with the a/c running I hold the newspaper up to the return, if the return pulls the newspaper to it and holds then duct should be fine. Temp. entering room can vary depending on how long a/c has been running. also check condensation drain in attic make sure it stays open. Also check the water level switch in drain pan if you have one.

SOURCE: not cooling good

while the machine is running, partially block the outdoor fan until the high pressure reaches 270 psi, the low pressure should be 70 psi at this time. This should be true within 10 lbs.

SOURCE: My new Goodman central A/C

You can pick up some soundproofing material from Home Depot et al that will quiet it down a little bit, or you might be able to turn down the fan speed using your thermostat (if your t-stat supports this), but it is most likely a side-effect of your unit kicking on. You might have too big of a unit for your house, or too big of a blower. A service tech would be able to tell you if this was the case, but obviously that's going to cost a bit for them to come out and look at it.

Are you hearing the whooshing noise through your vents in your floor/wall/ceiling, or is it coming straight out of the attic? Depending on your air handler/thermostat, you might be able to set your fan to slowly spin up, rather than going to top speed right away. This would probably make it a little quieter for you. I wouldn't suggest trying to do it on your own however, because (again, depending on your unit) there could be some reason why it does it like this, and/or could be some settings that would be devastating if they were messed with. I would suggest you call in a service tech, unfortunately.

SOURCE: I have an Amana new

All Amana and most other brands have a five year parts warranty, without the model number I would have to say either the thermostat, control wiring which sends a signal to the G terminal may not be working or the blower motor is bad or jammed up.