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Can I replace Tempstar heatpump w/aux heat thermostat with Honeywell RTH7400 programmable thermostat?

Mar 01, 2008 by Sandy L | Posted in Do It Yourself (DIY)

My current wiring does not fit any of the diagrams in the Honeywell RTH7400 installation instructions.

Hello Sandy:

I did a search for the RTH7400 and found this:

http://www.handymanwire.com/ubbthreads/s howflat.php?Cat=0&Number=693748& Main=693642

the guy is a little condescending, but the information

Programmable Thermostat

Honeywell RTH7500D Conventional 7-Day Programmable Thermostat www.amazon.com Aube by Honeywell TI040/U 7-Day Programmable Timer www.amazon.com ...

Honeywell RTH7500D Conventional 7-Day Programmable Thermostat

amzn.to Program each day differently, up to 4 periods per day. Program to save up to 33-percent on annual heating and cooling costs ...