Honeywell RTH7500 7-Day Programmable Thermostat Installation Guide

Honeywell RTH7500 Manual: Questions and Answers

Where is the terminal push button on a heat pump thermostat?

Next to the corresponding terminal. Press it down if you have difficulty inserting wires. Installation Guide, p. 13

Can the Honeywell RTH7500 control more than two cooling stages?

Maximum of 2 Cool/Compressor Stages. Installation Guide, p. 9

What does the Heat/Cool display flashing on the RTH7500 mean?

Compressor protection. Heat and Cool flash for 5 minutes when modes change. Installation Guide, p. 10

What does error code 173 mean on a Honeywell RTH7500?

The temperature sensor has encountered an error. Replace the thermostat. Installation Guide, p. 17

Why does heating or cooling not respond on my Honeywell RTH7500?

Several causes may prevent the system from responding.

• System mode set to Heat but temperature set lower than inside temperature, or set to Cool but temperature set higher than inside temperature
• Circuit breaker tripped
• Power switch at heating and cooling system is off
• Furnace door not closed securely
• System needs 5 minutes to respond after mode change Installation Guide, p. 18

Does the Honeywell RTH7500 support heat pump systems?

Yes. Set System Setup option 200 to 2 (Heat Pump) and then option 205 to 7 (Air to Air Heat Pump). Installation Guide, p. 8

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