07 A/C Moaning noise

[RussellSullivan]

If the compressor mounts or brackets aren’t secured tightly, or if there’s slight play, it can cause a moaning or humming noise. Double-check the mounting bolts and any rubber bushings. Sometimes, when the A/C system operates under pressure, the refrigerant lines can resonate or vibrate slightly, which could cause a moaning sound. Ensure the lines are securely clamped and spaced to minimize vibrations. And also check the bearings.

Thank you,
The compressor

If the compressor mounts or brackets aren’t secured tightly, or if there’s slight play, it can cause a moaning or humming noise. Double-check the mounting bolts and any rubber bushings. Sometimes, when the A/C system operates under pressure, the refrigerant lines can resonate or vibrate slightly, which could cause a moaning sound. Ensure the lines are securely clamped and spaced to minimize vibrations. And also check the bearings.

Thanks for all the good info. I am hoping to make time in December to replace the evaporator. It is the only component in the AC system that I haven’t replaced recently. I will inform y’all of the results then. R

 

[likorplf]

The "moan" is likely related to the compressor or surrounding components, especially the bearings in the compressor itself. Even though you replaced the compressor, it's important to double-check oil levels, ensure proper alignment, verify that the system pressure is correct, and inspect the compressor mounting.

 

[likorplf]

The "moan" is likely related to the compressor or surrounding components, especially the Wheel bearing kit in the compressor itself. Even though you replaced the compressor, it's important to double-check oil levels, ensure proper alignment, verify that the system pressure is correct, and inspect the compressor mounting.

Even though you've replaced the compressor, if the bearings in the new compressor are faulty or not properly lubricated, they could cause a moaning or whining noise. Inspect the new compressor for any unusual sounds when it's running, and ensure that it's not excessively vibrating or making noise due to bad bearings.