Removing Old Lennox Thermostat - HVAC - DIY Chatroom Home Improvement Forum


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

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

Reply
 
Thread Tools Display Modes
Old 08-28-2011, 07:06 PM   #1
Newbie
 
Join Date: Dec 2010
Posts: 19
Rewards Points: 10
Default

Removing old lennox thermostat


I bought a digital thermostat but am stumped as to how to remove the old lennox stat. Only numbers are inside: 9549 E8. There are no screws visible and if I pry from behind, or in between the base layers, I feel like I'll break it. Thanks.
Attached Images
 

Advertisement

124sport is offline   Reply With Quote
Old 08-28-2011, 07:11 PM   #2
fabrk8r
 
fabrk8r's Avatar
 
Join Date: Feb 2010
Location: Iowa
Posts: 849
Rewards Points: 500
Default

Removing old lennox thermostat


Remove the 3 small straight slot screws and the thermostat will come off the sub-base.

Advertisement

__________________
"The physician can bury his mistakes, but the architect can only advise his clients to plant vines." -- Frank Lloyd Wright
fabrk8r is offline   Reply With Quote
Old 08-28-2011, 07:51 PM   #3
I'm Your Huckleberry
 
Join Date: Mar 2011
Posts: 5,884
Rewards Points: 2,270
Default

Removing old lennox thermostat


Turn the breaker to the furnace off before removing any wires. Whichever wire is on RH or RC terminal will be hot, 24 volts. If that wire touches anything while live you stand the chance of blowing the fuse on furnace board. Just a minor inconvenience but still more work than neccassary if it blows.

Under those three screws there'll be two more holding that base to the wall.
Doc Holliday is offline   Reply With Quote
Old 08-28-2011, 10:54 PM   #4
Newbie
 
Join Date: Dec 2010
Posts: 19
Rewards Points: 10
Default

Removing old lennox thermostat


Thanks. I looked at those but the have contacts mounted through them so figured that wasn't it. But, will try tomorrow with breaker off of course.
124sport is offline   Reply With Quote
Old 08-29-2011, 07:29 PM   #5
Newbie
 
Join Date: Dec 2010
Posts: 19
Rewards Points: 10
Default

Removing old lennox thermostat


Done. Thanks.
124sport is offline   Reply With Quote
Old 08-29-2011, 07:37 PM   #6
fabrk8r
 
fabrk8r's Avatar
 
Join Date: Feb 2010
Location: Iowa
Posts: 849
Rewards Points: 500
Default

Removing old lennox thermostat


You're welcome!

Thank you for letting us know how things worked out for you.

I hope the new thermostat is everything you hoped it would be.
__________________
"The physician can bury his mistakes, but the architect can only advise his clients to plant vines." -- Frank Lloyd Wright
fabrk8r is offline   Reply With Quote
Old 09-03-2011, 01:16 PM   #7
Newbie
 
Join Date: Dec 2010
Posts: 19
Rewards Points: 10
Default

Removing old lennox thermostat


Actually, I think I'm gonna put on the old mercury based lennox. This thing (honeywell) stinks. It seems like it runs the ac forever. I guess cause its trying to get the temp down a full degree below the setting or something. Anyhow...we never felt so cold or so hot with the old thermostat. Thought this would be better for a newborn.
124sport is offline   Reply With Quote
Old 09-03-2011, 06:10 PM   #8
AKA HVACTECHFW
 
Join Date: Nov 2010
Location: NE Indiana
Posts: 2,369
Rewards Points: 1,102
Blog Entries: 1
Default

Removing old lennox thermostat


it maybe a setting in the stat or it is a cheapo stat. post the model number. You should not get wild temperature swings with a digital stat.
__________________
IT IS WHAT IT IS
hvactech126 is online now   Reply With Quote
Old 09-03-2011, 06:21 PM   #9
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,548
Rewards Points: 4,734
Default

Removing old lennox thermostat


Quote:
Originally Posted by 124sport View Post
Thought this would be better for a newborn.
Newborns/babies/infants. Are not uncomfortable at the same temps as adults are.


Post the model number of the new thermostat you have.
beenthere is online now   Reply With Quote
The Following User Says Thank You to beenthere For This Useful Post:
Doc Holliday (09-03-2011)
Old 09-03-2011, 08:36 PM   #10
Newbie
 
Join Date: Dec 2010
Posts: 19
Rewards Points: 10
Default

Removing old lennox thermostat


RTH2310 Programmable Thermostat. It was $50 at Walmart but with a $25 rebate so I guess it is a cheapo. Doesn't look like there is any adjustment/setting for this (ie- change when it turns on or turns off in relation to thd temperature setting. For example, if I set it at 72, it seems to want to take the room temp to 71 before shutting off. likewise it seems like it won't turn on until it gets to 74. I'd rather it shut off at 72, and turn on at 73).
124sport is offline   Reply With Quote
Old 09-03-2011, 09:03 PM   #11
AKA HVACTECHFW
 
Join Date: Nov 2010
Location: NE Indiana
Posts: 2,369
Rewards Points: 1,102
Blog Entries: 1
Default

Removing old lennox thermostat


so, yes, that is not a good stat IMO. I would recommend pro series Honeywell stats.
__________________
IT IS WHAT IT IS

Last edited by hvactech126; 09-03-2011 at 09:22 PM.
hvactech126 is online now   Reply With Quote
Old 09-03-2011, 09:04 PM   #12
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,548
Rewards Points: 4,734
Default

Removing old lennox thermostat


50 dollar tstats are cheapo's.

Move up to a 7500 series, it will have a tighter temp tolerance.
beenthere is online now   Reply With Quote
Old 09-03-2011, 09:59 PM   #13
Newbie
 
Join Date: Dec 2010
Posts: 19
Rewards Points: 10
Default

Removing old lennox thermostat


So am I looking for something with a "high/low" setting or "setpoint/desired temp" setting? (I saw those phrases in the specs on some of the higher end honeywells I googled). I want the ability to tell it when to kick on and off in relation to the temp I set zbd just need to know the proper "lingo" to look for. Thanks a lot guys. I'll bd taking this off soon.
124sport is offline   Reply With Quote
Old 09-03-2011, 10:06 PM   #14
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,548
Rewards Points: 4,734
Default

Removing old lennox thermostat


Honeywell doesn't allowed you to set a differential. Some of the Luxpro does though.
beenthere is online now   Reply With Quote
Old 09-04-2011, 11:25 AM   #15
Newbie
 
Join Date: Dec 2010
Posts: 19
Rewards Points: 10
Default

Removing old lennox thermostat


This looks like the only one I can find that allows this (in terms if what's readily available at home improvement stores)
http://www.lowes.com/pd_331377-79-44...&stop_mobi=yes

Advertisement

124sport is offline   Reply With Quote
Reply


Thread Tools
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Thermostat issues on old furnace - questions before I replace thermostat. Calab HVAC 11 02-18-2012 09:43 AM
weathertron Mecury Thermostat VickiL HVAC 4 02-06-2011 05:32 PM
Lennox Furnace not kicking on unless thermostat is turned off then on sharkbait HVAC 14 12-31-2010 12:27 PM
Problem with Lennox Pulse Furnace Wiring to Thermostat scalvin Electrical 4 12-30-2009 08:48 PM
Lennox thermostat question TrishP HVAC 4 12-20-2009 10:37 AM




Top of Page | View New Posts