Venstar thermostats require a minimum of 3 wires for heat and a minimum of 5 wires for heat/cool (6 or more may be required if you have a heat pump system or staging).

Two-Wire Heat-Only Kit (ACC0436)

Add-A-Wire (ACC0410)

Document # V1 (3 Wires) | Document # V2 (4 Wires) | Document # V3 | Document # V4

If you need assistance figuring out how many wires you'll need, email us at support@diycontrols.com, with a description of your HVAC system and a picture of your current thermostat wiring connections if possible. Please note that in rare cases, a manufacturer may use proprietary controls that may not be compatible with this thermostat.