Programmable Thermostat

This replacement thermostat is compatible with the Resideo TH6320ZW2003 (Honeywell Home T6 Pro Z-Wave) and equivalent models. It is a discontinued battery-powered or C-wire hardwired Z-Wave programmable thermostat designed for HVAC system control in residential and light commercial applications. The unit supports up to 3 heating and 2 cooling stages for heat pump systems, or 2 heating and 2 cooling stages for conventional systems, with integrated dual fuel and auxiliary heat lockout capabilities via outdoor sensor integration. The thermostat features flexible power options, operating on either 3 AA batteries or C-wire hardwired connection (20-30 VAC, 50/60 Hz), with AC power mode draw of 0.4 VA. It includes a large touchscreen display with approximately 7-inch diagonal LCD readout, providing clear visibility of indoor temperature, system status, Z-Wave connectivity, operating mode, and humidity levels. Temperature display is selectable in Fahrenheit or Celsius with backlit functionality for low-light environments. Temperature measurement accuracy is +/-1 Degrees F (+/-0.5 Degrees C), ensuring reliable climate control. Z-Wave protocol support enables remote monitoring and scheduling through compatible smart home networks. The device accommodates both Always-On-Supply (C-wire) and Low-Power Series Sleep (battery-operated) node configurations for installation versatility. This replacement is ideal for facility managers and HVAC contractors seeking compatible alternatives for legacy Resideo/Honeywell Home systems where original units are no longer available. Suitable for retrofitting existing HVAC installations requiring Z-Wave integration without complete system replacement.