I know it's nothing to do with motors but I just wanted to share this with you. My house has had damp walls for a many years but it wasn't coming from the ground and no one could work it out and it was put down to condensation. My neighbours with same houses not having a problem. Then one day I came home to find a small drip from the ceiling which I eventually tracked down to my immersion tank. I put a large saucer inder it to check the leak. Basically it had been leaking over the years up to 2 litres a day at which point the floorboards couldn't carry it away fast enough for it to go un noticed! Hooray - no more streaming windows every morning. You could do worse thatn check your own!
Tony