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?

Honeywell 5000 will do cooling only. A nice digital stat

I have a separate heat and a/c thermostats and wiring systems due to the age of my home. The thermostat for the a/c unit is a Honeywell T87F 2873 model for cooling only. I need to find a replacement. It is only a three wire system.

I agree with Josh. The Honeywell Pro 5000 can be set up to show only cooling option. Really nice digital, non-programmable thermostat. Very detailed instructions come with the stat for setting it up to meet your needs.