Please don't laugh at the silly question, but what component should I
buy to reduce the power output of a transformer from 26.4 volts, down
to 24 ?
This is an AC transformer that supplies power to the circuit board of
a home heating furnace. It takes line voltage in on one end and should
have an output of 24 Volts AC.
Two wires in, two wires out; grounding through its metal case. The
actual voltage going in is 118v and the output is 26.4v to 27.4v (two
The circuit board feeds the thermostat (among other things) and the
output on the thermostat leads is 27.11v
Do I need to install a resistor? If yes, what capacity?