Hey all, So of course, on the hottest day of the season, the AC unit is not kicking in. First I noticed that there was NO power at all to the AC unit. Check the plunger switch outside, it was on. Check the breakers inside and they were also on. After about 30 mins, I noticed the black hot was actually disconnected from the breaker on the panel. So connected that and rechecked the power at the AC unit. 240 v to the plunger switch thing 240 v to the one side of the relay 240 v to the other side of the relay but still nothing... no noise, no hum, no fan, etc. so... back inside, checked the thermostat. Set to cool and way below room temperature. Fan set to auto. I can hear the circ fan kick in, the furnace kick, back outside and still nothing. So... check voltage on the thermostat feed... and here's where I get a little confused and not sure what's suppose to be what... I have a black and white wire... on the black, 24v, on the white nothing. At the relay, two yellow wires... one on the right side and one on the left... the right side which is fed by the black has 24v but the other fed by the white has nothing. Soooo... I really don't know where the issue is and don't know how to troubleshoot much further at this point. Does anyone have any ideas. As far as I remember, this all worked fine last year. Thanks! S

Hi everybody... I have a 1993 American Standard/Trane central air unit. The condenser fan motor failed last weekend. I ordered a Fasco D917 to replace the original GE unit. I bought the proper 5mfd run capacitor at a local supply shop. I put it all together last night and this morning. For what it's worth (may be helpful to someone else), I was able to cut the shaft on the motor to the correct length using a Dremel and several #420 cutting discs. I actually finished it off with an old Ginsu-type knife, after I had cut about 90% of the way through with the Dremel. Then I used a sanding attachment to polish the cut area smooth. After I put it all back together, I turned it on, and the fan runs all the time, with or without the compressor. See the photos. Oriented the way the contactor appears in the photos, I have the black and white wires attached to the two upper terminals, which I'll call upper-left and upper-right. There is no labeling (no L1, L2, T1, T2, etc.) I tried moving the white wire from the upper-left position to the lower-right position, but then the fan wouldn't come on at all. So I put it back the way I had it, as you see in the photos. I'm guessing I might need to move the upper-right wire to the lower-left position, but the unit is near a wall and it's sort of difficult to work with. So, I thought I should ask here before randomly trying something else. It is cooling well (I haven't had a/c since Saturday and am willing to put up with the non-stop condenser fan for the rest of today, or however long it takes to get an answer.) As you can see from the photos, I have the brown and brown/white wires connected to the new run capacitor. I don't think it matters at this point, but the original motor had 3 wires, 2 connected to the dual capacitor and one connected to one of the metal tabs on the upper-right portion of the contactor. I'll check back to answer any questions, and thanks for any help. I realize the white and black cables aren't secured very well. I'll try to do a better job once we figure out their correct positions.