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Do you see any other numbers on the thermostat like may a number that starts with 1F?
No that's not on there
Ok thank you
Sorry for the delay. I have been on hold. As I suspected, the UP300 is not compatible with the 2 transformer system using both RC and RH terminals. The UP400 is compatible or there are a variety of good thermostats I could recommend. But we have to make sure e have both an R and RC or RH and RC terminal
Thank you I appreciate that what thermostat would you recommend that would work well
yes that would be good
One of the best choices for the money is the Honeywell RTH6350. Lowes sells for 49.98. http://www.lowes.com/pd_39500-74493-RTH6350D1000_0__?productId=3429098&Ntt=thermostat&pl=1¤tURL=%3FNtt%3Dthermostat&facetInfo= It will come with a factory jumper between R and RC. You will need to remove that jumper and put your R wire to Rc and your Rh wire to R