I have an old GE home furnace that smoked its 24VAC transformer. This
transformer has two additional output terminals that are marked "Thermostat
" and connected
to the thermostat. The other two outputs are marked 24v and are connected
the pilot light control unit and the gas valve. I took the bad transformer
local HVAC supply store and they didnt have a direct replacement or any idea
of the function of the two extra terminals marked "Thermostat". They wanted
me a generic 24VAC transformer but couldnt help me on where to put the wires
that went to the original transformer's "Thermostat" terminals.
Does anyone have any idea of what the original transformer's Thermostat
do and how can I adapt a generic 24VAC transformer to their operation?
thanks for any help!
I believe the terminal "connected to thermostat" has two wires attached to
it, possibly three. They just need to remain spliced together and have no
electrical connection to the transformer. The wire from the terminal " to
thermostat" has to be attached to one of the 24V transformer terminals, but
which one? If you trace back from the gas valve you'll find one of the two
wires goes to the transformer. The wire from "to thermostat" goes on the
Connect one thermostat wire to one new transformer terminal. Connect wire
(or wires) removed from one "24v" terminal on old transformer to other
terminal on new transformer. Splice remaining wires [one thermostat wire and
wire (or wires) removed from other "24v" terminal] together and insulate the
connection. The old transformer had one "Thermostat" terminal and one "24v"
terminal connected together and the power connected to the remaining two
terminals so no splicing was required. Hope this is clear.
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