Honeywell Home RTH2300B1038 5-2 Day Programmable Thermostat, White

Most important. It works.
Simple thermostat. easy to install and works perfect.Most have a light that lights when your adjusting the Temp.This has a nice size display and very clear to see.Also the price was fair.

Good thermostat
I replaced an old thermostat that is connected to my old furnace. The furnace is over 20 years old and works well for now and the old thermostat was good and simple. When the thermostat failed I decided to go digital and bought this thermostat. The electrical connections were a little bit different but the instructions on the thermostat were good enough for a clean installation. I set it up and it works great. It also interacted well with my old furnace. The interaction of an old furnace with a new thermostat is seamless. The only thing that I don’t like is that the thermostat does not tell you when the batteries are failing. The thermostat operation just stops. I woke up one time and the temperature in the bedroom was cold. I felt like I was sleeping outdoors. Then I came down to look at the thermostat and noticed that the screen was blank. I replaced the batteries and then everything was good but it took the furnace a while to get the temperature back up. Overall this thermostat is good and a good buy.

Great fit
Thermostat functioning great, great improvement from the previous thermostat, programmability is amazing

No separate heat and cool settings
This review is for the Honeywell RTH2300B1038 5-2 Day programmable thermostat. It works OK (meaning that it turns my furnace on and off), but it has several drawback that don’t match its higher price point over less expensive thermostats that have greater functionality.Installation was not quite as straight forward as I expected, I had to cross reference some youtube videos to make sure I was correctly leaving the blue thermostat control wire disconnected. A few extra details in the instructions would be helpful here. The first thing I noticed when it was connected and powered up is that it had the same dark/dirty area in the lower right corner of the green backlight that everyone else has pointed out. Definitely some quality control issues during manufacturing here. There’s a confidence booster… This isn’t really a big deal, because I don’t need to use the backlight.The next think I noticed was the deal breaker for me: though there is a five-day and a two-day program, there is only a single group of settings that will apply to BOTH the heating and cooling cycles. During the winter, we keep our furnace set a bit lower, usually around 67 degrees. During the summer, we keep the air conditioning set higher, around 75 degrees. You cannot achieve these setting with this thermostat – you only get one set of settings. This means you have to reprogram the thermostat every time the season changes. Call me lazy, but this introduces hassle that wasn’t present with my previous thermostat. This means I would need to write down the settings in some place that I’ll be able to find six months later. No thanks.The next thing that I noticed is that this Honeywell thermostat causes my furnace to cycle much more frequently than the old thermostat did. This results in more wear and tear on your furnace and air conditioning compressors. There might be a place to adjust this behavior, broadening the temp spread for the turn-on and turn-off points, but given that it only has a single set of time/temp settings, I had already made up my mind to return it, so I didn’t bother looking through the manual to see if this is possible or not.If you find yourself in need of a new thermostat, save a few dollars and pick up a Lux Pro PSP511C thermostat that is much better. It has separate time/temp setting for heating and for cooling and you can easily adjust the on/off temp spread so your equipment cycles less often. This saves wear and tear and is also more energy efficient.