> Honeywell PRO 4000 Programmable Heat Pump Thermostat

Honeywell PRO 4000 Programmable Heat Pump Thermostat

Honeywell PRO 4000 Programmable Heat Pump Thermostat

About This Thermostat

MFG: Honeywell
MFG#: TH4210D1005
Our#: 100978
Programmable: Yes (5+2)
Stages: 1H & 2C
System Compatibility: Heat Pump
Power Options: Battery, 24 VAC Hardwire
Heat/Cool Changeover: Manual
Programmable Fan: No
Temperature Limits: No
Keypad Lockout: No
Backlight: Yes
Vacation Hold: No
Honeywell's PRO 4000 offers a basic thermostat with the benefits of energy savings. PRO 4000 features an easy-to-read display and 5-2 day programming. Best of all, it's backed by the Honeywell name.


2 Heat / 1 Cool
Heat Pump
Backlit Display
Precise Comfort Control
Simplified Operation

Product Specifications:

Description: Electronic Programmable Thermostat
Application: Heat Pump Systems
Programmability: 5-2 Day Program
Changeover: Manual
Color: Premier White®
Switch Positions (System): COOL-OFF-HEAT-EM. HEAT
Switch Positions (Fan): AUTO-ON
Power Method: Battery or Hardwired
Terminal Designations: R, Y, AUX, E, G, O, B, L, C
Dimensions (in.): 3 13/16 in. High X 5 3/8 in. Wide X 1 1/4 in. Deep
Dimensions (mm): 97 mm High X 137 mm Wide X 32 mm Deep
Mounting: Horizontal
Frequency: 60 Hz;50 Hz
Operating Temperature Range (F): 32 F to 120 F
Operating Temperature Range (C): 0 C to 48.9 C
Setting Temperature Range (F): Heat: 40 F to 90 F; Cool: 50 F to 99 F
Setting Temperature Range (C): Heat: 4.5 C to 32 C; Cool: 10 C to 37 C
Differential Temperature (F): ± 1 F
Differential Temperature (C): ±0.5 C
Stages: 2 Heat/1 Cool
Sensor Element: Thermistor
Heat Current: 0.02 to 1.0 A running
Cool Current: 0.02 A to 1.0 A running
Operating Humidity Range: (% RH) 5 to 90% RH, non-condensing
Display Size: 1.73 sq. in.
Voltage: 20 to 30 Vac


by PowerReviews
Honeywell PRO 4000 Programmable Heat Pump Thermostat

(based on 1 review)

Reviewed by 1 customer

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(6 of 9 customers found this review helpful)


Pretty good thermostat

By Craig

from Knoxville, TN

About Me Renter

Verified Buyer


  • Easy To Adjust
  • Intuitive Controls
  • Precise Controls


    Best Uses

    • Apartment
    • Homes

    Comments about Honeywell PRO 4000 Programmable Heat Pump Thermostat:

    The product is pretty much as described... it has 4 periods per day. Weekdays all use the same schedule while weekends can use a different. However, if you work inconsistent times throughout the week, you may have to manually adjust it.

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