Compressor light on edgestar ap420hs

if voltage to compressor then check start up capacitor if ok bad compressor

Compressor has a problem internally.

This is rated at 1070 watts cooling. 1070 Watts cooling is 3650.9915473 BTU/Hr.
3650.9915473 BTU/Hr equals 0.30424929561 in Refrigeration tons....Pleazer Appliance...

I would check the freon level, because that would be the cheapest fix. If it's not the freon, it could be the AC compressor. If the compressor is locked up, it could make a screeching noise. As far as your brakes, I'd use some brake cleaner. Most likely (unless you've driven it tens of thousands of miles already) they are just dirty. Dust collects quickly on brakes. Hope this helps!

Check the the motor's run capacitor and check to ground and between motor windings with an ohmmeter.

Check to see if it is leaking water out from the bottom , also make sure that condensate pan is set properly

Hi,
By your description you may have a compressor problem. The noise is makes if a buzzing noise when it struggle to start (locked up). The clicking noise would be the relay clicking out on overload to the compressor.
If your correct on the date, you will be better off replacing the unit then looking into the repair, a normal compressor change out can run over 500.00. Your best bet is to cut your losses and replace the unit before spending any more money on it.
Good Luck

I’m happy to help further over the phone at https://www.6ya.com/expert/gere_bf68e6055dd61249

If you take off the back filter panel, you can look down into the innerds of the unit and you will see the squirrel cage.

When the car was built they did not have the chirpping option. I had owned a 95 & a 96 both purchased new and that chip you will not here from a factory unit. Maybe aftermarket has that option if you know someone with the chipping noise in their Caddy. I also worked at a Caddy dealership for 7 years and never heard one chirp in any 90's model

check you condenser fan motor make sure it turns on, if ok you must clean the fins on the outside unit,with a water hose , make sure you turn power off first before taking a water hose to unit