How To Replace Honeywell 8 Wire Thermostat - HVAC - DIY Chatroom Home Improvement Forum
Advertisement


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Like Tree2Likes
  • 1 Post By user_12345a
  • 1 Post By 57TinkerMan
Reply
 
Thread Tools Search this Thread
Display Modes
Old 08-28-2020, 07:28 PM   #1
Newbie
 
Join Date: Aug 2020
Posts: 2
Rewards Points: 4
Default

How to replace Honeywell 8 wire thermostat


Hi Everyone, I am trying to replace one old 8 wire thermostat in my condo. But my new thermostat has only 5 wires, I don't know to do it, are there anyone who could help me out?
Old model is Honeywell T8575D2003
New model is Honeywell RTH2300B

Thank you very much.
Attached Thumbnails
How to replace Honeywell 8 wire thermostat-old-2.jpg   How to replace Honeywell 8 wire thermostat-old.jpg   How to replace Honeywell 8 wire thermostat-new-1.jpg   How to replace Honeywell 8 wire thermostat-new-2.jpg  
Heavyduty123 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 08-28-2020, 08:03 PM   #2
Member
 
user_12345a's Avatar
 
Join Date: Nov 2014
Location: Canada
Posts: 12,475
Rewards Points: 108
Default

Re: How to replace Honeywell 8 wire thermostat


Wrong stat, need one that will work with your fan-coil.

Mechanical may be the condo corporation's responsibility and best not to mess with it if that's the case.
Heavyduty123 likes this.
__________________
I am not in the business of any trade I give advice on. I have non-professional hvac experience + good knowledge of theory. Attempt repairs at your own risk. Never jump out safeties - especially pressure switches - on a furnace for testing with fuel supply on; use a meter. Do not troubleshoot with live line voltage present unless there's no alternative.
user_12345a is online now   Reply With Quote
Sponsored Links
Advertisement
 
Old 08-28-2020, 08:12 PM   #3
Member
 
Join Date: Jun 2018
Location: Colorado
Posts: 531
Rewards Points: 918
Default

Re: How to replace Honeywell 8 wire thermostat


The new thermostat is not correct for your application. Would need to know more about your system, 2 pipe, 4 pipe, zone valves etc.. Could probably make the new one work but you would probably have to settle for one fan speed. Attached is wiring info for the old thermostat if anyone wants to take a stab at it.


https://customer.honeywell.com/resou.../95C-10897.pdf
Heavyduty123 likes this.
57TinkerMan is online now   Reply With Quote
Sponsored Links
Advertisement
 
Old 08-31-2020, 04:04 PM   #4
Newbie
 
Join Date: Aug 2020
Posts: 2
Rewards Points: 4
Default

Re: How to replace Honeywell 8 wire thermostat


Thanks for your reply. I did some reasearch in the internet, then I decide to buy a new 'Honeywell SuitePro TB8575a1000 24V Thermostats' which seems a compatible replacement.

They sais the#6 wire in old device for fan com will be unconnected, I hope it works.
Heavyduty123 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

Tags
5wire , 8 wire , honeywell , replace , thermostat


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Top of Page | View New Posts