Honeywell RTH5100B 1025 Deluxe Manual Thermostat

by Honeywell

Product Description

From the Manufacturer

This attractive one-piece Honeywell digital non-programmable thermostat features advanced temperature monitoring to minimize temperature swings ensuring your complete comfort. The RTH5100B has a green backlight and easy soft touch key operation. This thermostat also keeps the temperature settings in case of a power outage. Simple peace of mind and total home comfort. Works on all central heating and cooling systems including heat pumps without auxiliary heat source.

Product Description

Focus digital manual heat or cool thermostat. Large backlit digital display. Accurate temperature control of +/ 1 F. for consistent comfort. Set point is retained in memory in the event of a power outage. Easy to operate, soft touch keys. Auto change from heating to cooling to provide maximum comfort. Requires 2 ''AAA'' batteries. Easy installation. For use in most 24V heating and air conditioning systems. Not for use in electric baseboard, heat pump with auxiliary heat, or multistage heating and cooling systems. Approximately 4.5'' W. x 3'' H. x 1'' D. Off white.

Product Details

• Product Dimensions: 8.8 x 1.8 x 6.5 inches ; 8 ounces
• Shipping Weight: 8.8 ounces (View shipping rates and policies)
• Shipping: This item is also available for shipping to select countries outside the U.S.
• ASIN: B002RL9BIM
• Item model number: RTH5100B1025/A
• Average Customer Review: 4.0 out of 5 stars  See all reviews (21 customer reviews)
• Amazon Best Sellers Rank: #5,395 in Home Improvement (See Top 100 in Home Improvement)
  • #26 in Home Improvement > Building Supplies > Heating & Cooling > Thermostats & Accessories > Thermostats

Customer Reviews

Most Helpful Customer Reviews

31 of 33 people found the following review helpful:

5.0 out of 5 stars Simple is best, February 12, 2010

By 

Richard Reedinger - See all my reviews
(REAL NAME)   

Amazon Verified Purchase

This review is from: Honeywell RTH5100B 1025 Deluxe Manual Thermostat (Tools & Home Improvement)

I purchased this thermostat to replace an older programable type that I could not get to work properly. It would turn on and off at the oddest times and I could not correct it following the manual provided. I decided to return to a simple model, but wanted a digital type rather than the older mercury dial variety. This Honeywell thermostat is so simple to use, and is accurate as can be. I am retired and spend most of my time at home anyway and can set it and forget it. If we have been out for a few days, we lower the heat, and increase it to our regular temp when we arrive home. It is almost an instant warm up and absolutely trouble free. This is all you need to keep life simple and easy.

11 of 11 people found the following review helpful:

4.0 out of 5 stars Simple and effective, October 19, 2010

By 

Don Mitchusson (Denver, CO) - See all my reviews
(REAL NAME)   

Amazon Verified Purchase

This review is from: Honeywell RTH5100B 1025 Deluxe Manual Thermostat (Tools & Home Improvement)

I got this for my 87 year old mother-in-law who cannot manage multiple programs. She loves it, as the only choices she has to make are OFF/Heat/Cool, Fan On/Auto, and Temp UP/Down. Works great too.

20 of 23 people found the following review helpful:

4.0 out of 5 stars Let's see if this thermostat is or is not junk., April 24, 2010

By 

G. Laird (San Jose, CA) - See all my reviews
(REAL NAME)   

This review is from: Honeywell RTH5100B 1025 Deluxe Manual Thermostat (Tools & Home Improvement)

See my review of RTH110B. I thought it would work. It failed after 3 days.

I just installed this unit. I cycled it through heat/cool. Both work. They advertise that there is some auto switch over feature from H<->C. It must be programmed with the 2 arrow buttons. Complicated. Probably will be lost w/battery change. I have 3 functions heat, cool, & off. Which is what I want. It does maintain 1 degree range within set point. Display and buttons on front make adjustments quick and easy. Any mechanically inclined home owner can install this. The longest delay, will be positioning sheet rock anchors, if needed.
Thermometer is primitive and can not be calibrated to match existing/accurate thermometers. The work around is to simply adjust your set point by the difference between what this unit reads and your old unit.

I will update this review in the next days, weeks, months on its longevity, since Honeywell reliability has proved less than 100%.

1 Week later: Still works as advertised. I've gotten use to out of calibration thermometer reading.
1 Month later: Still working. Appreciating the 1 degree comfort zone.
1 year later; Still working.