Product review (5 stars): Replacing it myself probably save $125 and a 3 week wait
My air conditioning was working fine, but I noticed it the blower would not shut off even when turned off at the thermostat.  Quick research on the web indicated this was the likeliest culprit.  It took me a little bit of time to find the part next to the blower but once I got it replaced, that fixed the issue.  A couple observations. (1) you are dealing with 7 wires so make sure you know what they came off of. (2) this is held on by 2 screws. One just has to be loosened but the other has to be taken out.  It is tricky to get that one back in.  I had to use needle nose pliers to get it started. (3) once you turn the breaker on, have patience.  I thought I had something miswired or a bad part, but  the unit kicked on after about 10 minutes.  So don't panic if it doesn't com on right away.