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HVAC Product Type
Automation Control Systems
Ease of Installation
Intermediate (Installs < 60 minutes)
Aube Technologies
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Controls a Gas, Oil, or Electric Furnace and Fan, when adding a Heat Pump to your Heating System
Honeywell RC845 Aube RC845 Relay
Honeywell RC845 Aube RC845 Relay
Honeywell RC845 Aube RC845 Relay
Item# 300618
Price: Normally $65.18 
Hot Deal $39.21
Free shipping on orders over $175 - See Details


  • Compatible with most heat pump thermostats
  • Compact size permits installation on or inside an electrical box
  • Integrated design eliminates need for two-relay setup
  • Clearly labeled wires and connections enable simple installation and servicing
  • Low voltage dry contact output activates auxiliary heating system
  • Line voltage contact output controls fan
  • Terminal board connection enables easy installation

Essential Info

The RC845 is designed to control either a gas, oil furnace burner or an electric furnace as well as the fan when adding a heat pump on an existing heating system. The RC845 includes a low voltage dry contact output to activate the auxiliary heating system, and a line voltage contact output to control the fan operation. When installed with an Aube heat pump thermostat (TH144HP), the installer can configure the auxiliary heat sequence to turn OFF the compressor (Y) on a call for auxiliary heat. The RC845 combined with the TH144HP thermostat offers a complete integrated solution that simplifies installation and provides proper equipment operation.



Voltage Fan Contacts: 120 Vac/240 Vac
Electrical Ratings, Inductive Load: 1.0 HP @ 208 Vac (Fan Output)
Electrical Ratings, Inductive Load: 0.8 HP @ 120 Vac
Electrical Ratings (Full Load): 16 A @120 Vac
Electrical Ratings (Full Load): 12 A @ 240 Vac
Electrical Ratings (Locked Rotor): 42 A @ 120/240 Vac
Electrical Ratings, Resistive Load: Fan Contacts: 22 A @ 120/240 Vac
Electrical Ratings, Resistive Load: Aux. Heat Contacts: 5 A @ 30 V
Terminal Wire size: 12 AWG
Operating Humidity Range (% RH): 0 to 95% RH, non-condensing
Frequency: 60 Hz
Dimensions (in.): (3-7/32 in wide x 2-7/32 in. high x 1-13/32 in. deep)
Dimensions (mm): (82 mm wide x 56 mm high x 36 mm deep)
Weight (oz): (11.5 oz)
Weight (g): (326 g)
Operating Ambient Temperature Range (F): (-4 F to 140 F)
Operating Ambient Temperature Range (C): (-20 C to 60 C)
Storage Temperature (F): (-40 F to 175 F)
Storage Temperature (C): (-40 C to 80 C)
Approvals, Underwriters Laboratories Inc: Approved
Approvals, Canadian Underwriters Laboratories Inc: Approved
Includes: Lock-nut
Used With: TH144 Series
Used With: TH146 Series


2 Ratings
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Average Customer Rating
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MERRITT B -- dallas, TX   4/20/2013
Smarthome is helpful and gives very good service. Highly recommended

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