Hello you all.
I'm having some problems with our " salad bar cooler", First it is not very cold and second the compressor make a agravating noise as a alarm buzzer.

I checked the pressures ~10 and ~190 psig at start up (the design pressures are according to the nameplate 140 and 235 psig). I tought the noise may come from a overloaded compressor,that somebody added gas in it, because the missing screws confirm than i am not the first one to look at it.
The condenser coil is not sparklingly clean but it seem OK to me. My concern is that the capillary tube might be blocked to produce that kind of pressure difference.

Because i never had a very good success or luck by replacing the tube, i am woundering if it can be replace with a txv "valve" as metering device instead?

I hope someone of you can help me on that.

Thank you any way