List Price: $110.33
Sale Price: $44.94
Today's Bonus: 59% Off
I had a Lux programmable thermostat before this one, but it had some issues with my heat pump system... so I purchased this as a replacement. I've used it for roughly a month or two now, and it has worked flawlessly.
Like the Lux t-stat I had previously, it has four daily programs. During the winter, I have mine set to warm the house before I wake up, keep the house cool when I'm at work, warm it back up before I come home, and cool it down when I'm sleeping. Unlike the Lux t-stat I had, this allows you to have a nighttime setting after midnight. For example, I have my latest setting to bring the house to 65 at 12:30am. The Lux t-stat wouldn't let me do that, because it's technically the next day, but this one accounts for that... which is helpful. You can choose a different set of programs for the weekend. Unlike some programmable t-stats, this one forces you to use the same program for Sat and Sun, instead of having separate programe for each of those days. It's not an issue for me, but it may be for some people. There are other t-stats that allow you to set Sat and Sun separately.
If you change the temperature manually, it will override the program until the next time interval that you set. If you decide to take a vacation, you can set the temperature manually, and press the 'hold' button to override the program until you release it yourself.
The screen is backlit when you change a setting, so you can see what you're doing at night.
Also, a really cool feature that I liked is that the t-stat learns how long it takes your house to change temperatures. Instead of toggling your heat at the time you set it to, it will toggle the heat earlier, so your house reaches the temperature you set by the time you specify. This means if you come home at 6, you don't have to set your heater to turn on at 5.... you set it to 6, and the heater will turn on at the time it learned it needs to turn on to get your house warm by 6.
The only issue I have with this is the aux heat. I wish there was a way to fine-tune how the auxiliary heating works. I'm not even sure how it works now it seems to turn on at random, and not when it makes sense (ie when it's extremely cold outside). I'm not a heating expert, so there may be a reason for this, but my old thermostat seemed to manage it better.
In any case, I definitely recommend this if you're looking for a heat pump programmable thermostat this works on both the heat pump and air conditioning side of things. Haven't tried the AC features yet, but I'm sure it'll be fine :)
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This is a great functionally equivalent replacement for the Honeywell 8100 series heat pump thermostat. The terminals aren't exactly the same but I was able to figure out what went where by looking at the installation manuals for the old unit and the new one and lining up the functions.This unit is not billed as a homeowner installable (consumer grade) unit but I had no trouble installing it myself on my 2 stage heat, single stage cool heat pump. You'll need to know what kind of system you have, gas heat, electric heat etc but once you have the information you need, this is an easy install.Best Deals on Honeywell TH4210D1005 Electronic Programmable Thermostat
My experience was on the TH4100D1007 model, but applies to this model too. After changing the batteries on the unit, the unit stopped working correctly . After trouble shooting on my own and reading up online, it was very clear it was the motherboard. I called honeywell, and they said the installing plumbing contractor would have to be called ( 80$ service call NOT to be covered under the 5 year warranty) in order for the licensed contractor who originally purchased the unit would have to be the one to file a claim. What if they are no longer in business! I told them I would happily pay for the replacement cost, but they said they could do nothing without the contractor calling and the contractor can't call unless they come out for a 80$ service call. Now that I know this "racket" , I would like everyone to know to ask their heating contractor to put in a "non-professional" thermostat that can be purchased at home depot , lowes , etc. That way i can serviced by you without the expensive service calls. I think Honeywell could have given me a chance to just get a new faceplate. They were unfriendly about it as well. Stay away from any models that start in TH and go for the PTH and save a lot of time and money.Honest reviews on Honeywell TH4210D1005 Electronic Programmable Thermostat
It works as stated. No real problems here, but I hate this thermostat so much. The design was made by an engineer with no sense of intuition at all. When you look at it, it seems like a cluster***k of meaningless button. You get what you pay for though. There is a reason why this is on deep discount. The product experience just sucks. It's confusing. On top of that the pullout instructions barely tell you anything. They're barely instructions. I can't believe a huge company like this made such a crappy product. I had to watch a YouTube video to understand it -and I'm not old either, I'm not even 40 years old! I use computers and everything, but I found this to be dumb, dumb, dumb.For example... Why is there no button, so that I can activate the light and see the screen, hm? And the language they use is confusing.
These things should be easier to use. I turn a wheel and set the temperature, then it remembers my preferences, and I can just leave it. That's how it should be. A wheel, a digital display to show me what's going on, and an on/off switch. In this day and age that shouldn't be too hard, should it? Then again there's always the "you get what you pay for" idea. A Nest Thermostat costs almost $200.
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