How does a thermocouple have enough power to operate a gas valve?
"Bruce Farquhar" wrote:
On older boilers (furnaces if you're American), when the heating isn't
actually running (eg. the thermostat says the house is warm enough),
there's no power to the boiler, so how does the pilot light valve stay
open with the tiny voltage (40mV?) and current from the thermocouple?
What are they using, real boiler steam heat, or hot water ?
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