The DOOR Thermostat is a wired smart thermostat that controls a unit's heating, cooling, and fan, and reports temperature and humidity to the DOOR App. Like every DOOR Smart Home device, it connects through the DOOR Hub rather than joining WiFi directly, so a Hub must be installed and online for app control and remote access.
This article explains what the Thermostat controls, what HVAC systems it works with, and what it needs to run. For installation, daily use, and troubleshooting, see the related articles.
What the DOOR Thermostat controls
- Heating and cooling in AUTO, HEAT, COOL, or OFF mode.
- The fan, set to AUTO (runs on demand) or ON (runs continuously).
- ECO (energy conservation) mode, which auto-adjusts setpoints by a 2 °F–9 °F offset to save energy.
- Schedules — up to 4 periods per day with separate heat and cool setpoints. Schedules run locally on the device, so they keep working even if the internet or Hub connection drops.
- It also measures and reports temperature and humidity, with a built-in LCD showing live readings.
What it needs to work
- A C (Common) wire. The Thermostat will not function without a C wire. If the location has no C wire, a new C wire or a C wire adapter must be installed.
- A DOOR Hub online at the property for app control, alerts, and remote access. The HVAC control itself is wired, but everything you do from the DOOR App depends on the Hub.
- A compatible 24 VAC HVAC system (see below).
HVAC compatibility
The DOOR Thermostat works with 24 VAC systems — forced air, hydronic, heat pump, oil, gas, and electric — and supports single- and multi-stage equipment through its Y1/Y2, W1/W2, and AUX terminals, plus heat-pump reversing-valve control (HP/GAS and O/B switches).
It does not work with:
- Millivolt systems (for example, a standing-pilot gas fireplace).
- 120/240 V systems (for example, line-voltage baseboard electric heat).
On-device display
The Thermostat's LCD shows the day, time, and date, the current temperature and humidity, the heating and cooling setpoints, the active mode (AUTO/HEAT/COOL), the fan state (AUTO/ON), schedule state (RUN/HOLD), an ECO leaf when in ECO mode, and a connection indicator (white when connected, red when disconnected). It can also display readings from up to two guest sensors (SEN1, SEN2).
What your property may control
In a managed building, some Thermostat behavior — such as setpoint limits or schedules — may be configured by the property. If a setting you expect isn't available, check with your property manager.