Replace honeywell t87f with honeywell rth7500d for A/C and Heat

My home has separate heat and AC thermostats and wiring systems. I need to replace the cool only thermostat Hoenywell model T87F 2873 with a cool only model. What will replace this unit?

Curren wiring is configured as yellow wire to why terminal, orange wire to O terminal, red wire to are terminal, green wire to G terminal and a jumper from the W terminal to the why terminal. Hunter thermostat has the following terminals G, RC, RH, Y/O, W/B, and Y1 which wire goes where?

I am trying to replace my Honeywell T87F with a digital RTH230b. The connections from the old thermostat are as follows: G-Green Y-Yellow which is then connected to W B-Blue R-Red O-White The RTH230B says to connect: Rh Rc

About once a year, usually when it gets particularly cold, my heat conks out. I have the old, manual Honeywell T87F 2873 round thermostat, and have made sure the unit is "asking for heat" from the furnace (mercury tilted to the left). Still nothing. I live in a 4-unit apartment building with...

Hello Everyone. I just bought my new thermostat and installed it. Using my old thermostat, an old mercury White-Rodgers, I wiring the Honeywell to what I thought was a "conventional" system. I have gas heat and electric A/C. Outside I have the fan unit which blows air into the compressor and...