How to restart the furnce after you change the batteries in the thermostate

i changed the batteries in thermostat when I turned it back on it did't do anything but hum no heat is coming out
planny88
Asked Mar 13, 2013
If it's humming that sounds like it's not wired right. Normally thermostats get their control voltage from the unit. I'd have a HVAC guy look at it.
Rob
Answered Mar 13, 2013

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