Need Help tracing an Inoperative 240 V Radiant Electric Heat Circuit
I own a home built in 1968 that is settling. I've lost two of my 16 "zones" of radiant ceiling heat.
I'm familiar with the method to repair the buried wire (same process as radiant electric floor systems), but I'm having trouble understanding the process of tracing the wire in the ceiling to find the break.
Dog training systems using buried wires have a method, but it relies on the system's own transmitter to charge the circuit through a device called an "RF Choke". Then you use an AM radio to detect the signal.
I can't imagine that professional electricians don't have a way to diagnose breaks in wires buried in walls and ceilings. Can anyone recommend a method that won't break the bank?
I'm a retired engineer and plan to do the work myself.
They do have a way. It's a kit (sometimes called a toner) similar to the dog training system with a portable transmitter you clip on the wire in question and a receiver that you can move about the wall and ceiling surface and it gives off a tone.
A VCR or one of those set top boxes to let an old TV receive HDTV shows is a miniature TV transmitter. An AM radio may or may not squeal when placed close to the coax cable attached to the RF OUT TO TV coax jack. You might try connecting just the center pin of the other end of the coax cable to the wire in question, and use an AM radio to trace the wire in the wall.
Here's the best one I've found so far that appears to offer what I need:
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