Honeywell Y594R1680 24V multistage heatpump thermostat, includes T874R 1897

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Honeywell Y594R 1680 24V multistage heatpump thermostat, includes T874R 1897 and Q674L 1751$102.1567-Y5G

Specifications provided by manufacturer on manufacturer's website

This `Honeywell Y594R1680 24V multistage heatpump` can be substituted for these OEM part numbers:

manufacturerpart number(s)
Honeywell
Y594R 1680
Y594R1680