Posted 09-16-2001 at 05:10:11
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Have a very old steam system which, until this morning, has never given me a second's problem.
First time trying to turn on the heat this season and it did not fire...no 'click' at the main control indicating the thermostat was calling for heat.
Well, the wire going from the furnace to the thermostat appeared to have been pulled slightly, as there was new-looking insulation showing near (1/8 inch) some of the staples holding the wire to the beams in the basement. Apparently the women-folk took to enthusiastically cleaning cobwebs with brooms in the basement a few weeks ago...I suspect they may have moved the wire.
Anyway, took my volt-meter to the thermostat end of the wire and it reads 0.04 volts. Anybody know what it should read? I was guessing it should be something like 3V or so I suspect the wire is damaged in side the wall with just enough connectivity to give this micro-voltage reading. What do you think? Any other suggestions on where to look?