I'm installing a Nest thermostat, but I'm not getting sufficient voltage from the furnace panel to run it. What could be causing inadequate voltage from the circuit board?
When it comes to circuit boards in furnaces, there isn't really any repairing them, and you may have a bad terminal which would require a new board. Make sure to check that the stat only needs 24v.
Updated on April 11, 2018
By Dan Robbins