My thermostat to the fan and furnace is making a very loud humming sound. I've tried shutting the unit completely off and it still makes this noise. The thermostat is about 10 years old. Would replacing it fix the noise problem or do I have a bigger issue?

There is a noise coming from our bathroom sink after leaving the water running on cold for 30 sec.. Sounds like a thumping noise coming from the valve under this sink... almost like air is coming though the system... Thanks for the help Greg Greg1966@pacbellnet

Every time water runs down the sink in our bathroom a gurgling noise can be heard a few seconds after the water has disappeared. It sounds like air is coming back up the pipe. I have checked the U pipe under the sink of any blockages. The pipe goes into the wall which is plumbed into the main...

I just bought a new Rheem condenser and air handler last week. After it was installed, I noticed a humming/buzzing sound coming from the air handler - which is in the attic. Should a brand new air handler be making this noise? It is not loud, but every time my wife and I walk by/just below the...

When I turn the hot water on full I hear a loud rumbling sound coming from the faucet/plumbing. Any idea what it is or how I can fix it?