Venstar T3800 Voyager Residential Digital Thermostat 4H/2C with WiFi or ZWave Capability

Venstar T3800 Explorer Residential Digital Thermostat 4H/2C with WiFi or ZWave Capability

Item#: T3800
Availability:In Stock. Order by 2pm EST for same-business-day shipping.
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Note: Common wire required. If common wire not available see here for solution.

Provide quick, accurate control of your home's temperature with the Venstar T3800 Explorer Residential Digital Thermostat 4H/2C with WiFi or ZWave Capability. Its LED display is backlit and features large, easy to read digits. The fan options can be programmed hourly while the unit itself features a variety of temperature control options: seven day, five-and-two day, or single day. An outdoor sensor allows you to alter the program based on the day's weather. Whatever you choose for your settings, they're saved in non-volatile memory that won't be wiped in the event of power failure.

When it comes to picking wireless devices for the smart home, your selection is typically determined by the technology used—and your budget. Not the case with the Venstar Explorer Digital Thermostat, you can actually choose how you want to connect: WiFi or Z-Wave. Just add one of Venstar’s optional wireless modules. Once connected, you can tap into each thermostat from in and outside of the house, in order to cut energy costs or just to make the house how you like it.

  • 4 Heat & 2 Cool Stages
  • Control to or monitor a 2nd temp sensor
  • Setpoint limiting
  • Adjustable deadbands & timers
  • High/low outdoor temps for the day
  • Programmable fan
  • Smart recovery
  • Gas/Electric or heat pump - Mulit-stage
  • Simple as you want Operation 
    • Switchable : Programmable or Non- Programmable
    • Choose 7 day, 5+2 day or 1-day programming
    • Switchable: auto-changeover, heat or cool only 
  • Large. easy to read display
  • Scrolling display makes setup easy
  • Display can show dealer name, phone number and alerts 
  • Adjustable backlight intensity 
  • Backlit color coded buttons and legends
  • Choice of English, Spanish or French for scrolling display 
  • Bi-color LED indicates a heating or cooling demand 
  • Dry contact input
  • Outdoor sensor ready
  • Fahrenheit or Celsius display
  • Compatible with condensate overflow warning systems- lockout compressor with message on the display
  • Service alert indicators
  • Non-volatile memory
  • Keypad lock
  • Wireless connectivity with optional accessory
  • Title 24 compliant
  • ADR (Automated Demand Response) ready
  • FDD (Equipment Fault Protection) notification
  • API for 3rd party monitor & control
  • Night dimmer - to lower the display brightness in sensitive areas at night
  • Compatible with wireless Wi-Fi temperature sensor
  • Use Configurator app to easily setup Wi-Fi and thermostat settings

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)

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, 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.