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touched wires together while changing thermostat
I was installing a NEST thermostat. I didn't kill the power and touched the wires together. Now that radiant zone won't work. Is the problem in the zone valve? Maybe the end switch? Or a fuse in the furnace? Thanks!
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ramermechanical.com
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ME
If I recall, a Nest -- among other idiosyncracies -- must have a dedicated C lead -- 24 volts AC always on to operate at all.
You really have two choices -- something a less next generation and golly gee whiz, like a good programmable thermostat -- or pull a third wire for your Nest.
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England.
Hoffman Equipped System (all original except boiler), Weil-Mclain 580, 2.75 gph Carlin, Vapourstat 0.5 -- 6.0 ounces per square inch
The Nest claims it doesn't need a Common, but everything I've heard says it really should require one. For example, a really long call for heat can kill it's internal batteries.
And............ I just noticed SWEI said the same thing.