I have an Amana model RHD48A2A ac unit. About every 2 years the unit stops working and per the repair tech, it is usually related to a bad capacitor. I have decided to get an extra capacitor and replace it myself the next time it goes out. Currently, there are 3 capacitors installed- a 50 mfd and a 10 mfd wired in parallel for the compressor and a separate 12.5 mfd cap for the fan. These have been there for at least 2 years. I plan to purchase a dual capacitor, but noticed that the fan motor is stamped showing it should have a 7.5 mfd cap.

I fear one of the caps is out of spec, even though they are not bulging. When the system starts, there is a loud noise that lasts a few seconds, then everything sounds normal. It has only recently started making this noise.

So, should I purchase a 60/12.5 to replace what is there exactly, or a 60/7.5 to match what the fan motor is labeled?

There is also an aftermarket hard-start kit installed.

Thanks in advance for your help and advice.

 

You should get a 60 / 7.5 440VAC dual capacitor (or two).

The 370VAC dual caps are not as good. I use 440VAC any time that they fit.