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Non-Programmable Controller, Low Volt

TH146-N-U/U

Low volt non-programmable 3 heat/cool conventional and 4H/2C heat pump thermostat

Per local restrictions, item is not available for sale in the state of Colorado as of January 1, 2026

This product is obsolete, but it can be purchased while supplies last.

This product is available in Canada only.

  • Product Info
  • Literature
  • Accessories & Replacement Parts

Overview

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

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

Product Specifications

Application
Heat/Cool or Heat Pump with Auxiliary Heat
Dimensions (in.)
User console: 3.1 in. X 3.1 in. X 1 in.; Control module: 3 in. X 4.3 in. X 1 in.
Dimensions (mm)
Control module: 76 mm X 109 mm X 25 mm; User Console: 79 mm X 79 mm X 24 mm
Includes
CT280-3H3C control module, TH146 user console, AC144-03 Outdoor Temperature Sensor (3-m/10-ft) with Mounting Clip
Used With
Aube CT240/CT241 Telephone Controllers; Aube AC146-410 Air Duct; Temperature Probe; Aube RC845 add-on fossil fuel relay; Aube AC130-12 wallplate
Comments
Two-piece Design: Two-wire User Console Connection, Dual-energy Input, Backlight
Item Type
Product
Mounting
Control Module: Horizontal; User console: Vertical
Stages
Up to 3 Heat/3 Cool Conventional; Up to 4 Heat/2 Cool Heat Pump
Operating Humidity Range (% RH)
0% to 95%, non-condensing
Supply Voltage
24 Vac
Switch Positions (System)
HEAT-OFF-COOL-AUTO-EM.HEAT
Switch Positions (Fan)
AUTO/ON
Operating Temperature Range (F)
32 F to 122 F
Operating Temperature Range (C)
0 C to 50 C
LEDs
Console: System Fault, Em. Heat, Dual-energy; Module: 1 per output
Power Method
Hardwired
Ambient Temperature Range (C)
0 C to 70 C
Ambient Temperature Range (F)
32 F to 158 F
Color
White
Sensor Element
Thermistor
Accuracy (F)
±1 F
Accuracy (C)
± 0.5 C
Switch Type
Relay
Terminal Designations
R, C, Y1, Y2, Y3, W1, W2, W3, G, (O/B), L
Changeover
Auto or Manual Selectable
Setting Temperature Range (F)
40 F to 86 F
Setting Temperature Range (C)
5 C to 30 C
Cycles per Hour
2-6 CPH (Heating and Cooling)
Cool Current
1.0 A
Heat Current
1.0 A
Fan Current
1.0 A
Fan Operation
On/Auto

Accessories

CT240-01/U

Telephone controller with 2 simultaneous outputs for thermostats or appliances

CT241-01/U

Telephone controller with 4 independent outputs for thermostats or appliances

AC146-410/U

Temperature sensor for air duct and air handlers

AC130-12-P10/U

Pack of 10 Wall plates for thermostat

RC845/U

Add-on fossil fuel relay. Control gas, oil furnace burner or electric furnace.