Honeywell Electric Heat Thermostat, Non-Programmable, SPST, w/ Thermometer

Electric Heat Thermostat SPST, High Sensitivity, Heat Only


Brand: Honeywell

Mfr Part#: T4398A1021

UPC#: 085267088442

Availability: In Stock
Usually ships: within 1 business day
Qty Price
$18.35 / each
x6 $105.90 / box & Free Shipping
(6 x $17.65 / each)
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Honeywell T4398A1021 Electric Heat Thermostat for Electric Baseboard Heat includes thermometer, range stops and locking cover screws. A snap action switch of Honeywell T4398A1021 makes the heating circuit on temperature fall.
This High Performance Honeywell Electric Heat Thermostat provides precise line voltage control of resistive-rated electric heating equipment.
Application: Electric baseboards, convectors and fan forced heaters (resistive rated loads).


  • For control of resistive-rated baseboard electric heaters;
  • Extremely sensitive to temperature changes;
  • Replace virtually all standard wall-mounted line voltage thermostats;
  • Color-coded leads allow easy installation;
  • Include long-lasting Micro Switch mechanism;
  • Rugged, plastic mounting base;
  • Cover thermometer indicates room temperature;
  • Well suited for upgrades and high-end new construction;
  • Mounts directly on vertical 2 x 4" outlet box, or on 4 x 4" outlet box;

Technical Specifications:

  • Mounting: Vertical Mount;
  • Color: Premier White;
  • Stages: 1 Heat;
  • Electrical Connections: 6" (150 mm) copper leadwires, suitable for connecting to aluminum wiring if approved CO/ALR solderless connectors are used;
  • Switching Action: SPST;
  • Accuracy: 1 C;
  • Dimensions: 4-1/2" high x 2-7/8" wide x 2-5/8" deep;
  • Setting Temperature Range: 50F to 80F;
  • Differential Temperature: 2F;
  • Differential Temperature (C): 1 C;
  • Electrical Ratings: Noninductive resistive 22A at 120/208/240 Vac. 19A at 277 Vac.;
  • Frequency: 60 Hz;
  • Sensor Element: Vapor filled dual diaphragm;
  • Ambient Temperature Range: 50F to 80F;
  • Approvals, Underwriters Laboratories Inc: Listed; File No. E47434, Guide No. XAPX;
  • Approvals, Canadian Standards Association: Listed: File No. LR1322;
  • Includes: Thermometer, range stops and locking cover screws;
  • Tradeline Value: Tradeline;
  • Voltage: 120/208/240/277 VAC;
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