I have a Majestic DV360 gas fireplace, close to 20 years old. When I moved in I replaced the regular on/off wall switch with an old (20 years also) Robertshaw 9600 programmable thermostat to give a bit more control of the fireplace. There is probably 6-7 feet of wire between the gas valve terminals and the thermostat.
Because it is so close to the fireplace the heat has more affect on the thermostat than I would like so I want to move the thermostat farther away. Although this thermostat is low voltage (but apparently not millivolt) so far it has worked OK to open/close the gas valve as desired. Moving the thermostat would require a wire length of anywhere from 25 to 50 feet. Would you expect that with the additional wire length the thermostat would still operate the gas valve? If not, would a true millivolt thermostat do the trick?
Because it is so close to the fireplace the heat has more affect on the thermostat than I would like so I want to move the thermostat farther away. Although this thermostat is low voltage (but apparently not millivolt) so far it has worked OK to open/close the gas valve as desired. Moving the thermostat would require a wire length of anywhere from 25 to 50 feet. Would you expect that with the additional wire length the thermostat would still operate the gas valve? If not, would a true millivolt thermostat do the trick?