Skip Content

Low V T-Stat,Stages Heat 1,Stages Cool 1 close
close x

Using 360° Viewing:

  1. Rotate: Use top-to-bottom, side-to-side by use of mouse arrow.
  2. Zoom In: Double click on image.
  3. Zoom Out/Reset: Put photo at full zoom & then double click.
Megaphone How can we improve our Product Images?

Low V T-Stat, Stages Heat 1, Stages Cool 1

Price $336.00 / each

Activate Now

to save with

Select AdvantageSM

Please sign in or register to access lists

Confirm ZIP Code to determine availability.


Invalid Zip Code


Ship to: (Change)


Invalid Zip Code

  • Item # 20RF34
  • Mfr. Model # T602DFH-4
  • UNSPSC # 41112209
  • Catalog Page # 4219
  • Shipping Weight 0.25 lbs.
Country of Origin Canada Country of Origin is subject to change.
Note: Product availability is real-time updated and adjusted continuously. The product will be reserved for you when you complete your order. More

Technical Specs

  • Item Low Voltage Thermostat
  • Stages Heat 1
  • Stages Cool 1
  • Terminal Designations Fan-H,Fan-M,Fan-L,24V Hot,24V Com,BO5 Aux,BO5 Aux,BO3,BO4,BO1,BO2,BI1,RS,Scom,BI2,UI3
  • System Switching Auto-Heat-Cool-Off
  • Display LCD
  • Key Pad Lockout Yes
  • Programmable Fan Yes
  • Automatic Changeover Yes
  • Humidification Control No
  • Dehumidification Control No
  • Remote Sensing Capability No
  • Temporary Program Override Yes
  • Temporary Temperature Hold Yes
  • Filter Indicator No
  • Temperature Limiting No
  • Battery Backup No
  • Low Battery Indicator No
  • Batteries Included No
  • Dual Transformer Compatible No
  • Power Method Transformer
  • Voltage 24VAC
  • 750mV Compatible No
  • Height 5"
  • Width 3"
  • Depth 1-1/2"
  • Color White
  • Control Range 40 Degrees to 100 Degrees F
  • For Use With Heating and Cooling
  • Agency Compliance cTUVus, CE
Megaphone How can we improve our Technical Specifications?

Compliance and Restrictions



Retains programmed information in the event of a power loss.

Product Reviews Disclaimer:
Grainger is neither responsible for, nor does it endorse, the content of any product review or statement posted. Any statements posted constitute the statements of the poster and are not the statements of Grainger. The statements posted by Grainger employees with the Grainger employee badge represent the views of such employees and are not the statements of Grainger. Grainger makes no representations as to the appropriateness, accuracy, completeness, correctness, currentness, suitability, or validity of any product review or statements posted, including those posted by employees with the Grainger employee badge, and is not liable for any losses, injuries or damages which may result from any such product review or statements. Use of any linked web site provided in a product review or post is at the user's own risk.