Hi, I have a fairly old air con unit that I have posted on here before about, and to avoid confusion, I have started another thread to simplify my problem.

The air con unit in question is a portable room air con, that doesn't work. When the unit is switched on, the compressor makes a kind of buzzing sound for a few seconds and then the cut out switch comes into effect and stops it. I think this may indicate that my compressor is stuck.

I have replaced the compressor run capacitor with no effect, and I was wandering whether it is worth buying a start capacitor to boost the starting torque.

Could there be any other reasons for my air con to be doing this?
Also can I make a starting capacitor thing. I believe there is a relay or sumthing in there, so if you have a schematic for one of these devices, it would be much apprieciated.

Thanks,
Oliver