How can I locate a faulty relay (silent operator) for electric heat? I have electric heat in my house, each room on it's own breaker in the garage. One room now bakes at around 83 degrees and will only shut off if the breaker is switched. I replaced the room's thermostat with one from another room that I know works and the same thing happened. My electrician is leaving town for 3 months, but brought over a new relay, which he said is most likely what is needed. However, we were unable to find where the old one is. The room's cable from the breaker switch in the garage is visible for about 10 inches and then disappears under insulation. Checking where the other cables come out through the basement does not reveal that particular one anyway. I've removed the basement insulation near the (sheetrocked and paneled) room with the problem but there's no sign of the cable. I explored the baseboard heaters, but no luck. Two questions: Is there a tool that can help trace the cable to locate the faulty relay? Is it possible to ignore the faulty relay and install one near the breaker box where the cable is obvious? Any help would be greatly appreciated.