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Replacing Honeywell TH9421C1004 thermostat. How to ...

Oct 17, 2014· 5,486 satisfied customers. I have an older T87F Honeywell ThermoPride thermostat that. I have an older T87F Honeywell ThermoPride thermostat that needs to be replaced. The thermostat is for a gas furnace and central air conditioning. The wires marked on the base are Y, W, G, R, and RH. … read more. Matthew.


I need to replace my honeywell thermostat model TH9421C1004,

Feb 03, 2017· I have a Honeywell TH9421C1004 Visionpro IAQ Thermostat installed on my heating/AC system, The system is a hybrid heatpump/gas heat system with an electronic air filter and a wholehouse humidifier. … read more


I purchased as a 3 year old house last year. It has a ...

Nov 26, 2014· It has a TH9421C1004 Visionpro thermostat which no longer shows anything Answered by a verified HVAC Technician. We use cookies to give you the best possible experience on our website. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them.


Never Seen This Before. : Nest

So I''m trying to replace my Honeywell th9421c1004 thermostat. I took it off the wall and realized it''s linked to an EIM that I''ve never noticed before in the furnace closet. So it''s got the 1 2 3 wires from the thermostat to the EIM. This normally wouldn''t be an issue, I could just get rid of the Honeywell in the living room, unwire everything ...


YTH9421C1010 Honeywell YTH9421C1010 VisionPro IAQ ...

Apr 14, 2015· Honeywell YTH9421C1010 VisionPro IAQ Thermostat, Module, Outdoor Sensor The VisionPRO IAQ touchscreen universal programmable thermostat provides electronic control of 24 Vac heating and cooling systems in addition to humidification dehumidification and ventilation all with just 3 wires to the thermostat. Description: VisionPRO189; IAQ Total Home Comfort System with …


Help with Honeywell YTH9421C1002 thermostat

Nov 12, 2016· 1. Since the TH9421C1004 thermo is discontinued is there a replacement that I can use with my existing 3zone system without a major change? 2. I have 2 adjoining bedrooms on the same zone and would like to parallel program a 2nd thermo so that 1 thermo works at night only and the 2nd works daytime only. Any problem? I already do something similar with a DPDT relay on another zone …


TH9421C1004 Honeywell TH9421C1004 Honeywell VisionPRO ...

The TH9421C1004 is a VisionPRO IAQ touchscreen universal programmable thermostat that provides electronic control of 24 Vac heating and cooling systems in addition to humidification, dehumidification and ventilation all with just 3 wires to the thermostat. Parts Accessories: C7089U1006 Remote Outdoor Sensor C7189U1005 Remote Indoor Sensor


Honeywell TH9421C1004 Visionpro IAQ Thermostat ...

Honeywell TH9421C1004 Visionpro IAQ Thermostat Brand: Honeywell 36 ratings About this item Advanced dualfuel control. Three wires to the living space allows for easy equipment upgrade Thermostat requires the Equipment Interface Module or EnviraZONE panel MFGTHM5421C1008 (not …


honeywell thm5421c manual

The first three wires on the top left are connected to the thermostat. The Honeywell THM5421R1021 IAQ equipment interface connects the (heat pump, two stage furnace, humidifier and dehumidifier) equipment right at the furnace. 425 Smart Response 0 = No 1 = Yes Here is a picture of how I currently have things wired up. Notes on the furnace indicate each thermostat is a separate zone. Checkout ...


New Honeywell TH9421C 1004 VisionPRO 9000 Touchscreen ...

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VisionPRO® IAQ Total Home Comfort System with Temperature, Humidification, Dehumidification and Ventilation Control


Honeywell TH9421C 1004 VisionPRO 9000 Touchscreen ...

The housing has red scuffs / scratches on the front from continually rubbing against the manual during transport.


TH9421C1004 Honeywell TH9421C1004 VisionPro IAQ …

Aug 29, 2014· Honeywell TH9421C1004 Vision PRO IAQ Thermostat features 7 day programming and is designed for Up to 3 Heat/2 Cool Conventional Systems and Up to 4 Heat/2 Cool Heat Pumps.


is introducing 27 New Honeywell Thermostats by ...

Oct 15, 2009· Honeywell TH9421C1004 9. Honeywell YTH9421C1002 YTH9421C1010. Search and overview. Search and overview. Close. Try. Features Fullscreen sharing Embed ...


Th9421 installation manual Coproduction practitioners ...

If an indoor Correct Wiring Information My current hot water heating system has a two wire contact closure activation of the circulator pump (Posted by mscho6357 4 years View and Download Honeywell TH9421C1004 installation manual online. VisionPRO IAQ. TH9421C1004 thermostat pdf …


Replacement Products for TH9421C1004/U

Replacement Products for TH9421C1004/U. No Replacement Parts Found. Replacement Parts for this product may be available from Honeywell but not available on the web or not accessible to you. Please contact Customer Service or your Sales Representative for assistance.


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TH9421C1004/U Honeywell Customer Portal

Conventional and Heat Pump systems. Dimensions (in.) 4 9/16 in. high x 6 in. wide x 1 1/4 in. deep. Dimensions (mm) 116 mm high x 152 mm wide x 32 mm deep. Includes. Thermostat only. Used With. THM5421C1008 Equipment Interface Module.