"Edwin Pawlowski" wrote

Each wire should be 110 to ground, 220 if you contact both of them. The
thermostat is breaking just one wire. If it is the stat, you can get heat
by twisting the two wires together.


This is what I would have thought, but the puzzle is that I get the 110v to
ground, but not 220v across the hot conductors. Changing thermostats made no
difference, so unlikely a thermostat problem.

Graham