We have a RUUD AC unit, model number UAMB-042JAZ. ...

more than likely less than 13 seer too old

Go to the following web address:

www.servicemanuals.net/‎

call your local ruud dealer and have him cross reference model number or look on fan motor itself, if original then cross reference ok, but if it has benn replaced look on the fan itself

capacitor is labled on side in mfd and voltage rating. may have to turn cap. in its bracket to rea.

that is a model number for the outside condensing unit. to find the motor size for the inside unit, you will need the model off of the inside unit, gas furnace or electric air handler.

DO NOT buy a RUUD system. I purchased a complete system in 2010 & have had multiple issues since - - new coil, high humidity levels, condensation on my walls when the furnance is on, and now when the outside temp is 90+ degrees the AC unit shut off and only blows hot air. THey've replaced the "board" and I was told that RUUD is aware of multiple problems with the 2010 units but will NOT recall them.

They are: Height:19in X Length: 40-1/2in X Width: 27-5/8in

You can also check the manual here:
http://www.adamsheatingandcooling.com/ruud/ruud-ac/uakb/UAKB-specs.pdf
It is located on page 6.

Hope this helps!
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HI there well i think what you dog chewed on was the thermostat wires. if you tell me the colors maybe i can help you out.
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#8 wire

You may want to call around to the different supply houses in your area. Most supply houses will not sell to unlicensed people but occasionally you will find one that will but there isn't a warranty and they jack up the cost. You might have a hard time finding the right relay as well because Ruud/Rheem in the last few years are designing their parts to fit just their brand just like Lennox, Carrier, and Trane does. It keeps money in their own pockets. Good luck finding what you need.