Bad compressor valves most likely... If the expansion valve or orifice tube is stuck open it will cause this condition also.
I do not know your situation but a good guess is that your well pump is always on and is not getting enough pressure to shut off the pressure switch. So I would shut off the power to your well pump and see if the buzzing stops and if it does then I would replace your well pump. If the buzzing don't stop with pump shut off then it could still be your well pump check valve slowly leaking threw but I think its your pump because its not pumping enough to shut off with or with out a bad check valve.
Bad thermo,replace. The thermo senses that the pilot is lit and opens gas valve,also could be bad or blocked gas valve.
Sounds like you have a bad zone valve or zone pump. There is either a pump, and the zones in the house have zone valves, or each zone has it own pump. Zone valves go bad all the time, you can just replace the motor on it instead of sweating the new valve in. The box that is on top of the valve.
If on a well, check filter coming into house. It will drop pressure if clogged really badly. Change filter, also small blue bladder tank may be bad. Tube inside tank busted. If tank is bad you will need to replace bladder tank. When this rubber tube inside tank burst it causes tank to fill completely fill with water and becomes water logged. The last thing it could be but unlikely is foot valve going bad in well.
Check the compression of the cylinders you will have a low reading in the one with a bad valve
No. It sounds like you have a bad pressure reducing valve if your on city water or you might have a swamped expansion tank if your on pumped water. But before you go to extreams you might want to unscrew the end of the faucet and clean the aerator.
how do you know when valve lifters for 94 mercury villager 3.0 engine r bad
A PVC valve is typically bad in a car if a car has an oil leak. Other signs of a bad valve include a collapsed hose and a sludge-like buildup.
If the bladder is bad in your expansion tank the tank will fill with water. When this happens the pressure in your furnace will exceed 30lbs and your pressure relief valve will blow off.
Maybe pressure balancer going bad or you don't have a pressure balanced valve
hopw do I find the egr valve on a vauxhall signum
Low fuel pressure, bad IAC valve, vacuum leak, bad injector(s). You also need to check the EGR valve.
1990 Honda accord ex how would you know if idle air control valve is bad?
no. bad oil pump, worn bearings or valve guides
You can tell when a manifold tuning valve is bad when oil is leaking through it. You also can tell by inserting the dipstick into the valve and seeing if oil comes out through the dipstick.
Generally speaking the symptom of a bad PCV valve is a buildup of pressure inside the crankcase. If it is bad enough it can cause the engine oil to come out through the dip stick tube. If you pull the dipstick out and hear a release of pressure that is probably an indication of a bad PCV valve. The common way to check the PCV valve is to take it out and shake it. If it has a rattle then it is supposed to be good, no rattle it is assumed to be plugged up and no longer working. I am not certain if that is still a valid check.