I have a small apartment unit that has a GE BTB918A10041 AC unit on it. The relay is continually sticking closed. The condenser fan runs all the time. I can bump the relay with a screwdriver and get it to shut off. I have buffed the contacts and the relay will stick again after about 2 days. I will assume the I just need to replace it. Anyone know what the part number is for the relay that I need? Thanks