I have a Honeywell LR69071 thermostat in the house now with: G,O, Y, X ,W, R and the thermostat I am switching to has RH, RC, Y, W, G. Is it possible to interchange these thermostats? I would appreciate any help I can get on this.

NO,, the old tstat is for a heatpump I believe,, the new tstat is not for a heatpump, it is for heat-----cool only