my White Rogers 156-3069B thermostat works well but furnace turns on and off too frequently. can i adjust the gap from say 1 degree to say 3 degree differerential for the furnace to cycle less frequently. in the winter, we are away from the house for 3 months of jan, feb and mar, so comfort is not an issue - saving energy would be more important can you help me - thanks email at garthsteph@gmail.com