Resideo Non-Programmable 3H/3C Conventional & 4H/2C Heat Pump Thermostat

This thermostat features a 2-wire user console connection, idea for retrofits. This TH164-N-U includes a non-programmable console, a control module, and an outdoor temperature sensor Product Features Installer mode bypasses compressor lockout delay for quicker installations Removable connector strip simplifies wiring Selectable cycles (2 to 6 per hour) optimize system to heating/cooling application Control module for equipment connections can be installed near furnace/air handler, only 2 wires required for console connection Automatic changeover between heating and cooling Backlit console display shows indoor and outdoor temperature, or indoor temperature and humidity level Complete defrost sequence protection (requires AC146-410 air duct temperature sensor) Keypad lock for console prevents tampering