Sort of off topic, but also sort of related.
We have a TRANE XL90 (2007) furnace that quit working. Inside blower refuses to start, outside fan/compressor starts fine. The primary problem appears to be a POV (those voltage overload capacitor looking disc that I've seen in many radios/TV's). The disc failed in the classic fashion, with burned through contacts and a black spot on the board.
The control unit consist of a 6 inch PC board, 4 electrolytics (all appear to be good, no swelling) a regulator diode, 4 toriodial transformers and this POV. The motor ohms out okay, and is getting 120 volts all the time (which is normal), but refuses to spin up. The start relay for the motor clicks, and does nothing else. TRANE says that there is no start/run cap on the motor. The motor normally operates on a variable speed system, and "talks" to a central control board that's basically the heart of the furnace. 24 volt xformer okay, thermostat okay.
My question is about that POV. We are 90% sure it just took a voltage hit, and died. BUT, when the things go out, is it a symptom of something else, or in this case, it just died?
Schematics for this thing are almost impossible to read and decipher, plus the schematic for the actual motor control, is not available.
I'll try and get a picture tommorow if possible.
We have a TRANE XL90 (2007) furnace that quit working. Inside blower refuses to start, outside fan/compressor starts fine. The primary problem appears to be a POV (those voltage overload capacitor looking disc that I've seen in many radios/TV's). The disc failed in the classic fashion, with burned through contacts and a black spot on the board.
The control unit consist of a 6 inch PC board, 4 electrolytics (all appear to be good, no swelling) a regulator diode, 4 toriodial transformers and this POV. The motor ohms out okay, and is getting 120 volts all the time (which is normal), but refuses to spin up. The start relay for the motor clicks, and does nothing else. TRANE says that there is no start/run cap on the motor. The motor normally operates on a variable speed system, and "talks" to a central control board that's basically the heart of the furnace. 24 volt xformer okay, thermostat okay.
My question is about that POV. We are 90% sure it just took a voltage hit, and died. BUT, when the things go out, is it a symptom of something else, or in this case, it just died?
Schematics for this thing are almost impossible to read and decipher, plus the schematic for the actual motor control, is not available.
I'll try and get a picture tommorow if possible.
