A/c makes a popping noise when idle after being on.?

Question

in the bedroom of my condo, i have an a/c in the wall that is also a gas heater. all of a sudden (ie it started yesterday), when it switches off (because either i turn it off, or it's reached the temp the thermostat is set to), it gives off loud clicking or popping noises.

The way i can describe them is as though it's expansion or something, that kind of noise... But I don't understand why it would just start doing it all of a sudden.

What could it be? Some of the 'pops' can be quite loud and startling.

Answer 1

Check for loose electric wire connections

Check for compressor rubber base condition and bolt tighting