Model # RTH5100B

Internet #203186916

Honeywell Deluxe Digital Non-Programmable Thermostat
0085267338509

Honeywell

Deluxe Digital Non-Programmable Thermostat

  • Works with heating, cooling and heat pumps
  • Large, backlit display shows room temperature
  • Set temperature and current time all at once
$40.37 /each

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Product Overview

Honeywell's RTH5100B Deluxe Digital Non-Programmable Thermostat offers simplicity, comfort and value that's easy to see. It's large screen size and wide variety of features it apart from other non-programmable thermostats. Even better, it's easy to install and use.

Info & Guides

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Price
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Name Digital Non-Programmable Thermostat for Heat Pumps Deluxe Digital Non-Programmable Thermostat Deluxe Digital Non-Programmable Heat/Cool Thermostat Non-Programmable Universal Thermostat
Brand Honeywell Honeywell Honeywell Emerson
Ratings (73) (111) (33) (5)
Thermostat Type Heating and Cooling Heating and Cooling Heating and Cooling Heating and Cooling
Operation Type Mechanical Digital Digital Digital
Features No Additional Features Automatic Heating/Cooling Changeover,Backlit Display,Battery Back-Up,Battery Operated,Low Battery Indicator Automatic Heating/Cooling Changeover,Backlit Display Backlit Display,Battery Operated,Low Battery Indicator
Certifications and Listings No Certifications or Listings No Certifications or Listings No Certifications or Listings No Certifications or Listings
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Customer Questions & Answers

49 Questions71 Answers

Customer Questions & Answers

Deluxe Digital Non-Programmable Thermostat
Deluxe Digital Non-Programmable Thermostat

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5 answers

DO YOU HAVE TO RUN ON BATTERIES OR DOES IT HOOK UP LIKE MURCURY THERMOSTATS WITH 4 WIRES

This question is from Deluxe Digital Non-Programmable Thermostat
Asked by
BEAN
February 27, 2013
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Answers (5)

Asked by
Read all my Q&A
November 12, 2013
Answer: 
A single AAA battery (not included) is needed to operate the lighted display however the thermostat will still operate at the desired setting (if the battery is dead) using the 4 wires as referenced in the question. The battery is not needed to hold the setting in the event of a power outage (according to the instructions).
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Asked by
Lynchburg, VA, USA
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October 22, 2013
Answer: 
It's 4 (or 5) wire, but needed to install battery to make it work.
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Asked by
Monterey Park, CA, USA
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October 15, 2013
Answer: 
Yes on both,the unit use two AAA batteries to run just the unit LED display and green light to see at night.Then there are four wire's you use to wire the unit same as your old unit.
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February 28, 2013
Answer: 
The Honeywell RTH5100 does require batteries to power the microprocessor.
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February 28, 2013
Answer: 
Hi Bean,
This thermostat requires batteries as it is a programmable electronic thermostat, unlike a mercury thermostat which is a non-programmable mechanical thermostat.
The batteries power the thermostat and allow it to maintain the programed settings in its memory.
Mike,
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4 answers

will this thermostat automatically switch between heat and cooling?

This question is from Deluxe Digital Non-Programmable Thermostat
Asked by
Denver, CO
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October 30, 2014
I have a four wire system, the current old thermostat has to be manually switched between heat/cool. Will this one just do it automatically to keep the desired temp? or do I need to get the lesser model that has the manual switch?
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Answers (4)

Asked by
Knoxville, TN
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Home Improvement Profile: DIYer
October 8, 2016
Answer: 
One reason I purchased this particular unit was because it claimed to have "auto" switchover between heating and cooling. I also have a standard four wire system and my unit, which otherwise seems to function properly, will not let me select "auto"! The instruction manual has the following "weasel-wording:" "Note: The Auto system setting may not appear, depending on how your thermostat was installed." Read More
One reason I purchased this particular unit was because it claimed to have "auto" switchover between heating and cooling. I also have a standard four wire system and my unit, which otherwise seems to function properly, will not let me select "auto"! The instruction manual has the following "weasel-wording:" "Note: The Auto system setting may not appear, depending on how your thermostat was installed." What the heck is that supposed to mean? I installed the thermostat correctly! Read Less
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Asked by
Pittsburgh
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Home Improvement Profile: DIYer
May 5, 2015
Answer: 
No, it will not. You have a selection button to choose between the options for Heating, Cooling, and OFF.
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Asked by
Aurora, CO, USA
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November 1, 2014
Answer: 
Yes. There has to be a three degree difference between heating and cooling. It will even enforce that for you. If you move one to less than 3 degrees separation it will automatically move the other one far enough away.
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Asked by
FL, USA
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Home Improvement Profile: DIYer
November 1, 2014
Answer: 
YES. That's what so great about this unit. I programmed mine for 71 heat and 78 cooling. Set it and forget it...
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4 answers

It says there is a clock display?

This question is from Deluxe Digital Non-Programmable Thermostat
Asked by
Seabrook, NH
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November 26, 2013
When looking at the specifiations, it states there is a clock display which is part of the (room temperature, and heat or cool setting), but in the picture, it does not show it. (??) Is there a clock display as well...?? Thanks...Charlie
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Answers (4)

Asked by
Port St. Lucie, FL, USA
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March 28, 2014
Answer: 
No. You really don't need a clock. It doesn't care what day or time of day it is. It's just a great AUTO heat or cool. Mine is set at 71 and 78. Which works out perfectly here in Florida.
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Asked by
Los Angeles, California
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Home Improvement Profile: Professional
January 23, 2014
Answer: 
Hello Charlie, Well i can tell you for a fact that there is no Clock that tell you the time. What they mean is there is a clock display "The Numbers" look like a clock .
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Asked by
New Hampshire, USA
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December 24, 2013
Answer: 
Charlie,
There is NOT a clock display on the unit.
See the photo I added.
User submitted photo
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November 27, 2013
Answer: 
The Honeywell RTH5100 is a digital non-programmable thermostat. It will display both the room temperature and set temperature setting, but it does not have a clock or time display.
If you do have further questions, please contact the Honeywell Consumer Technical Support Line at 1-800-468-1502.
Sincerely,
Honeywell Customer Care
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3 answers

How do I tell at the fuse box if I have 110 or 220 electric baseboards?

This question is from Deluxe Digital Non-Programmable Thermostat
Asked by
Tacoma
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June 18, 2014
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Answers (3)

Asked by
FL, USA
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Home Improvement Profile: DIYer
September 9, 2014
Answer: 
The system will use two (2) fuse breakers next to each other and will be ganged together by a metal clip if it is using 220 volts. The box label should be marked as such.
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June 30, 2014
Answer: 
The Honeywell RTH5100B is not rated for 110 or 220vac. It is only rated for 24vac. If you are having difficulty identifying your electric heat circuit you should involve an licensed electrician or licensed HVAC contractor in your area to partner with you in your project.
If you have further questions, please contact the Honeywell Consumer Support Line at 1-800-468-1502.
Sincerely,
Honeywell Customer Read More
The Honeywell RTH5100B is not rated for 110 or 220vac. It is only rated for 24vac. If you are having difficulty identifying your electric heat circuit you should involve an licensed electrician or licensed HVAC contractor in your area to partner with you in your project.
If you have further questions, please contact the Honeywell Consumer Support Line at 1-800-468-1502.
Sincerely,
Honeywell Customer Care Read Less
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Asked by
Atlanta GA
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Home Improvement Profile: Professional
June 27, 2014
Answer: 
Hey Donna,
You'd first need to see if you have a fuse panel or a circuit breaker panel.
If it is a fuse or breaker, you'll need to safely trace the wires leading to the panel from the heaters.
Depending on what type of fuse panel you have will determine what type to look for. Most breaker panels have a double pole for 220V devices, and a single pole for 110V.
The additional information you need to Read More
Hey Donna,
You'd first need to see if you have a fuse panel or a circuit breaker panel.
If it is a fuse or breaker, you'll need to safely trace the wires leading to the panel from the heaters.
Depending on what type of fuse panel you have will determine what type to look for. Most breaker panels have a double pole for 220V devices, and a single pole for 110V.
The additional information you need to view is also the correct number of amps listed on the fuse/breaker.
Inspect the panel only after turning off the power to the heaters, if you are aware of where they are. If you don't, then make sure the entire is turned off at the main power/disconnect.
As with anything electrical, if you have any further questions or concerns, please consult a local licensed electrician who can answer them in more detail for you.
Joseph Read Less
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Customer Reviews

Deluxe Digital Non-Programmable Thermostat is rated 4.7 out of 5 by 111.
Rated 5 out of 5 by from very reliable - stays at 73/73 all the time We had our programmable thermostat replaced. The old one had to be constantly monitored and changed back to 73 when it went up to 76 and down to 70. This new one doesn't need any monitoring or changing, since it is set to 73 and has stayed there with the temp staying right around 73 all day and night. This is an excellent thermostat and well worth the cost - a great value that will soon be recovered when the electricity bills are reduced for better efficiency. Highly recommend this reliable product. One tip: The specs on the web site indicated 4" height and 3" width, which would have perfectly replaced the old unit; however, this unit is 3" height and 4" width, so the electrician installed it sideways and it is now perfect!
Date published: 2016-08-16
Rated 4 out of 5 by from Excellent and easy to use basic thermostat, I like it. Comes with a good installation manual and ... Excellent and easy to use basic thermostat, I like it. Comes with a good installation manual and an 800 number to call for installation assistance if needed.
Date published: 2016-12-10
Rated 5 out of 5 by from Thermostat is very easy to set up, adjust and use. Display is easy to read. It also switches easi... Thermostat is very easy to set up, adjust and use. Display is easy to read. It also switches easily from cool to heat.
Date published: 2016-11-01
Rated 5 out of 5 by from I am going to Home Depot to buy this thermostat today. I have a heat pump. My current thermostat ... I am going to Home Depot to buy this thermostat today. I have a heat pump. My current thermostat has a battery. I am going to turn off the heat circuit breakers. Do I have to remove the battery from my current one. I burnt out my old one because I never turned off any of the power and the wires touched. It didn't have a battery. My 5 year old thermostat is programmable. It is a pain in the neck. No idea why they make them so complicated to program.
Date published: 2016-12-04
Rated 4 out of 5 by from Easy to install, easy to use. The main reason I purchased a new thermostat was to get ride of the programmable one we had. The reason I picked this particular one is because of the large easy to read display. It is easy to read to change the temperature, the numbers are huge. The only problem I had was that the words for the "cool", "heat" and "off" are written so small you can't read them. This is why I gave 4 stars instead of 5. The back-light is brighter than I expected, when you push one of the buttons it lights up bright and the contrast is great so you can see it real easy, better than I expected. Push the up button and the temp goes up, push the down and it goes down, easy.
Date published: 2016-03-15
Rated 4 out of 5 by from Gets the job done! Buttons are unlit which may be an issue in the dark since this unit is the non... Gets the job done! Buttons are unlit which may be an issue in the dark since this unit is the non-programmable type. The display does light up once any button is depressed.
Date published: 2016-12-27
Rated 5 out of 5 by from Simple thermostat for someone who is home a lot . The 30 year old programmable thermostat this r... Simple thermostat for someone who is home a lot . The 30 year old programmable thermostat this replaced was just too complicated. This one is simple and functional.
Date published: 2016-12-22
Rated 1 out of 5 by from Did not work Installed per the instructions and it did not work. Rewired and it still did not work.. I am an production engineer so I know how to follow instructions.
Date published: 2016-07-26
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