ELECTECK 5-1-1 Day Programmable Digital Thermostat for Home, up to 1 Heat/1 Cool with Large LCD Display, Compatible with Single Stage Electrical and Gas System, White

Been working for a few years, now. I like how you don't have to hold down the button for a few seconds to change the temperature.

I purchased two of these ELECTECK 5-1-1 Day Programmable Digital Thermostats for my home and another one for my relatives home. I am only using it to run the gas heating furnace.I use a two wire connection which is using the batteries (2 AAA) to trigger the relay and switch the furnace on/off.I do like the large numbers and the blue backlight that comes on when adjusting the thermostat with the buttons. It is very easy to read and good for my older eyes.The programming is pretty easy to figure out, the instructions are good explaining the operation of the buttons.Just an FYI these thermostats replaced the top of the line Nest thermostats which I have had for almost 3 years. The Nests have a mind of there own as far as heating goes. I was absolutely disgusted with the operation of the WiFi learning thermostats. In the 3 years I had them, I saved zero on heating charges. The scheduled temperature was always being overridden by a few degrees because of the learning function which you can never really turn off permanently. The temperature would be set up to maintain 68 degrees but the temperature inside would get to 66.5 degrees before it would turn on my furnace. These ELECTECK 5-1-1 Day Programmable Digital Thermostats are a major upgrade in my honest opinion.Nest, never again!

The last thermostat (Honeywell) did not have a jumper cable (cord) on the wire connector. It was installed and did not need one, two years (?) ago. I am going to reinstall that "jumper" and see if the furnace or A/C does activate. So, far, that has not occurred. So, I do not understand if this remedies the problem, why that is even needed if the old Honeywell device did not need one to function the HVAC system?The old device I felt the need to preplace due to the fact, the temp readings were as high or higher than five degrees f. So, we were having problems with cranking up the heat to as high as 78 or sometimes 80 just to keep the house warm. I thought this problem was due to sickness (we've been sick on and off, with no explanation from doctors), need us to turn up the heat. So, I am sure this will work due to the alarm clock that I have is, giving the same reading of temp or plus or minus one degree.

This was quite reasonably priced, had an instruction manual that seemed to accomodate almost any system configuration one might find, and had a set of labels included so as to be able to map and follow the wires. I had bought this for the simplest of systems, a ceiling mounted propane heater, so installation was straight forward. The programming was simplicity. So why did I remove one star?One feature that would have been easy to include in the firmware would have been an automatic reset to the program temp settings after either a prescribed time period, or at the next wake-leave-return-sleep event. As it is, if one manually overrides the temperature command, that override stays in place until one manually removes it. At least, that's the best I can get out of it. With the heater in my shop, it means if I forget to reset it when I leave, it wastes heat.

do exactly what is it done for. no problem to install and works as soon I connected it

For a gas only system with only two wires, this is so easy to install and use. I am red/green color blind. Just hook up the white wire to W terminal, and the dark wire to the RH terminal. On the dry wall, mark and drill two holes using an 11/16" drill bit for the screws' drywall anchors. Tap in and secure. The display light defaults to a dim mode (saves batteries), but snaps to highly visible blue contrast by tapping top menu button. Programmable 4 levels (M-F, and Sa, and Su), say 1. warm at 6 am, 2. cooler at 9 am (no one home); 3. warmer at 4 pm ; cold at 11 pm. You can adjust the thermometer to +- 3* F by accessing the 'Technician' setup mode.

Thermostat was easy to set up and program, worked great for three months, then came down to a room that was 85 degrees when set for 64. Oil is expensive enough without burning it all night! Kudos to Amazon for allowing a return past the timeframe, planned on getting a new one, but think I'll pass and try another brand...

Super easy 10 minute install... I could not ask for anything more tbh.