We've been in our new house for about 4 months. A couple months ago I noticed something strange going on in my workshop. My 110v compressor started slowing down (RPMs) and eventually it wouldn't work at all. When I turned it on it would just make a few revolutions and then quit. Other electrical tools and fixtures seemed to be working so I figured the compressor was dead. I bought a new one today and plugged it in and it did exactly the same thing. So on a hunch I brought it into the house (separate building) and plugged it in and it worked fine. Obviously something's up with the electrical circuit in the shop. So I called my builder and he said that all the outlets in the workshop are on GFI circuits and they've had some problems with those choking the circuit. He suggested replacing them with standard outlets. I only had one extra outlet on hand so I replaced one of the GFI outlets. Unfortunately it didn't help, that particular circuit still did the same thing. I'll call him back tomorrow to say it didn't work. In the meantime, what could cause a compressor to run at like 1/10 its normal RPMs? This is a dinky compressor (and brand new), draws only like 10.5 amps. All the circuit breakers are 20 amps and none of them tripped when I was plugging the compressor into different outlets. Any ideas?