I have a 220 volt 1-1/2 horsepower spa blower. It runs about 5 minutes then shuts off, I think due to overheating. It was very old, 15+ years old. And has never worked in the 10 years I have lived here. Took it apart to check the brushes (which were fine), but since the motor looked really rusted I figured it was bad.

I just purchased a new blower, and it also runs 5 minutes and shuts off. Darn it....

It is located 24 feet from the in-ground 8-foot round spa, but with no hartford loop. Total depth of spa about 3 feet or so, spa bubble air holes about 2 feet or so deep (around the seating area).

The wiring is 220 volt. Two 110 volt hot legs that come from an Intermatics timer box, and a ground. One leg runs straight through to the blower, the second leg runs to a on-off light switch to turn blower on-off.

Any ideas on this? I can't figure anything out.