Your browser is not supported. For the best experience, you should upgrade to a modern browser with improved speed and security.

Honeywell YTH9421C1002 - VisionPRO® IAQ Touchscreen Universal Programmable Thermostat 4H/2C

Item: YTH9421C1002
MFR: YTH9421C1002/U
Checking price...
Decrease quantity
Increase quantity

Your Order Templates
Save products for later, or create lists to quickly re-buy items for routine jobs.

Add to Order Template

Inventory At Nearby Branches



VisionPro Indoor Air Quality (IAQ) programmable wireless thermostat eliminates need for multiple controls, managing temperature, humidification, dehumidification and ventilation from single touch-screen control. TH9421U touch-screen universal programmable thermostat provides electronic control of 24-volt (AC) heating and cooling systems or 750-millivolt (mV) heating systems in addition to humidification, dehumidification and ventilation. RedLINK wireless enabled. Thermistor sensor element. Standard VisionPro features. Connects with equipment interface module or Envirazone panel. Automatically lowers humidity and removes pollutants, using air conditioning or whole-house dehumidifier.


NameHoneywell YTH9421C1002 - VisionPRO® IAQ Touchscreen Universal Programmable Thermostat 4H/2C
Gemaire Item NumberYTH9421C1002
Manufacturer Product NumberYTH9421C1002/U
SKU - PIM Number1371469489940
ERP Number175618
Unit of MeasureEACH
Weight2.0 Pound (lb.)
Length7.2 Inches (in)
Width5.5 Inches (in)
Height4.5 Inches (in)
Hazardous MaterialNo
EPA Cert RequiredNo
Country of OriginMEX
Voltage20-30 VAC
Electrical RatingTHM5421 is rated 20 to 30 VAC
Power MethodCommunicating
Batteries IncludedNo
Stages Cool2
Stages Heat3
Sensing ElementYes
ApplicationHeat/Cool or Heat Pump with Auxiliary Heat
Differential Temperature± 1°F; ±0.5°C
Fan SwitchingYes
System SwitchingYes
Temperature RangeHeat: 40°F to 90°F (4.5°C to 32°C); Cool: 60°F to 99°F (15°C to 37°C)
Terminal Designations1, 2, 3, C, R, Rc, Rh, R, W1-O/B, W2-Aux, W3-Aux2, Y, Y2, G, L, Out1, Out2, In1, In2, Dats1, Dats2, Hum1, Hum2, Dhm1, Dhm2, Vnt1, Vnt2
Warranty Offered5 Year
IncludesTH9421C1004 Thermostat and THM5421C1008 Equipment Interface Module
Operating Humidity5 to 90% RH, non-condensing
Comments/NotesIncludes Humidification Control with or without Frost Protection, Dehumidification using Whole House Dehumidifier or Air Conditioning with High or Low speed fan, Advanced Patented Ventilation Control and Advanced Dual Fuel Heat Pump Control.
GEM - Case Quantity