Hi,
My air handler motor stopped working at home. I called a tech who suspected that run capacitor got bad and so he replaced it. For first 6 hours, it seemed to run fine although with some noise however later the noise level increased and I noticed that at times, motor was not running as if not enough torque. I then called York to get specs of capacitor originally on the unit (my tech took away the old part with him) and was told that it was 7.5 microfarad. What I have now is 6 microfarad one which also has a 100K resistor mounted in parallel (which was not there on my old one as I recall).

Does the problem I have is because of motor itself or lower microfarad rating capacitor and/or 100K resistor mounted in parallel with the capacitor?

I will greatly appreciate a response.

The motor in the unit will have a ID plate/sticker of some type usually located around the belly of the motor. The information you are looking for is located on this plate or ID sticker and you usually have to remove the motor from the unit and blower so as to read it but it will be the original information since every motor and all new motor replacements have one specifically for that item. I know it is a pain top do but it is really the only way to get the true information since motors can be changed without changing the capacitor and the capacitor can be changed without changing the motor. In this case it is best not to guess so take a look. BTW in many cases the factory wiring diagram or parts manual can be wrong since during production runs parts can be changed without notations to the exterior diagrams and part manuals BUT the motor in the unit will always have the information specific to it located on the motor itself. As professional service persons we have to do a lot of research like this and it sure does take the fun out of the job sometimes.