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'21 3121ck heater
question..
on my main thermostat in the hallway there are two different modes.. gas & elec.
when i launch the heater in 'gas' mode the thermostat displays 'gas', turns on and away we go...
when i launch the heater in 'elec' mode, the thermostat displays 'elec' for about 3 seconds, but then displays BOTH.. 'gas and elec' on the thermostat display panel, and the heater turns on.
am i to assume that when in 'elec' mode that both propane and electricty is being used .. or just propane?
thank in advance.
r-
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Threaded Mode
