Honeywell YTH9421C1002


Touchscreen Thermostat, 4H, 2C, w/Interface

YTH9421C1002 686282
Average Rating: 5
Read Reviews (1) Write a Review
$249.64+ 10 Business Day Shipping $14.56
No Longer Available


ItemVisionPRO IAQ
TypeVisionPRO IAQ Touchscreen Kit
Stages Heat4
Stages Cool2
Temp. Settings per Day4
Programs per Week7
Terminal Designations
System SwitchingHeat-Off-Cool-Auto-Emer. Heat
Fan SwitchingAuto-On-Circ.
DisplayLCD, Backlit
Key Pad LockoutYes
Programmable FanYes
Humidification ControlYes
Remote Sensing CapabilityYes
Battery BackupNo
Low Battery IndicatorNo
Dual Transformer CompatibleYes
Power MethodHardwired
Voltage (AC)24
Height (In.)4-9/16
Width (In.)6
Depth (In.)1-3/8
Control Range (F)Heat 40 to 90, Cool 50 to 99
CharacteristicsTouch screen selectable 7 Day or Nonprogrammable , 3 Heat/2 Cool Conventional or 4 Heat/2 Cool Heat Pump System, humidification, dehumidification and ventilation Control with 3 wires to thermostat
For Use With Module or EnviraZONE panel
Includes Thermostat and Interface Module
Green Environmental AttributeProduct Contributes To Reducing Energy Consumption
UPC 085267273053
Weight 1.500000


Wireless Thermostat Kits and AccessoriesControl KitsTouch-screen 1RZY2 features selectable 7-day programmed or nonprogrammed operation, 3 heat/2 cool conventional or 4 heat/2 cool heat pump stages, plus humidity, dehumidification, and ventilation control. 3 wires to thermostat.

Low Voltage T-Stat, Touchscreen Programmable With Equipment Interface Module, Stages Heat 4, Stages Cool 2, Temp Settings per Day 4, Programs per Week 7, System Switching Heat-Off-Cool-Auto-Emergency, Fan Switching Auto-On-Circulate, Color White, Display LCD, Backlit, Green Screen, For Use With Whole House Dehumidifier Or Air Conditioning With High Or Low Speed Fan and Heat Pumps, Includes Humidification, Dehumidification, Ventilation And Dual Fuel Heat Pump Control

Customer Reviews

Average Product Rating: 5
based on 1 reviews

Worked perfect to replace PC8900

Sunday, May 08, 2011

I had the previous generation of this product which is now obsolete. The IAQ is a direct replacement with the control box. Installation was simple and the wiring was identical except for 3 wire vs 4 wire thermostat connection. Nearly everything worked without a hitch, except for the old outside temperature sensor. It appears they have a new one for this box that has a similar number as the old one, but has a completely different temperature profile, so I just disconnected it.

Simple installation, works great

The old one had an LED on the thermostat that lit when the furnace was one, so was easy to see it cycling. Not so obvious on the LCD display, but not such a big deal.

Submitted by Comfortable in Seattle
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