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Questions and Answers for Honeywell 7-Day Line-Volt Programmable Thermostat with Digital Backlit Display

Internet #202793843

Model #TL8100A

Store SKU #566573

  • Custom-adjust room temperatures via the electronic controls
  • Supports control of 2- and 3-way zone valves
  • Settings for wake, leave, return and sleep

Questions & Answers

15Questions
caret
Q:does this thermostat have an ?OFF? option? i recently purchased a home with this system. Master bedroom, downstairs area and basement all have their own thermostat. I can only bring it down to 40 degrees, so it?s still burning a lot of oil in the summer.
by|Jul 19, 2022
1 Answer
Answer This Question

A:  Hi Stuman, this thermostat doesn't have the Off option. The set temperature range of the thermostat is from 40 F to 85 F. - Maria

by|Oct 28, 2023
    caret
    Q:I just put new batteries in. And it still won't work. How do I reset it?
    by|Jan 19, 2022
    1 Answer
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    A:  Hi Julie, we would like to get more details about this like if the thermostat has a blank display, what is the voltage, wattage and amperage of your system, if this is a new installation or if it was working before. Our tech support team will be happy to help troubleshooting, you can contact us at (800) 468-1502 or through social media. - Maria

    by|Jan 19, 2022
      caret
      Q:How long will the setting last when the power goes out?
      by|Dec 25, 2019
      1 Answer
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      A:  Hi Craig! When there is a loss of power to your Honeywell thermostat, the set temperatures, schedule, and other settings will still be retained in the device. -John

      by|Dec 27, 2019
        caret
        Q:what are the outside dimentions. Not the screen dimentions.
        by|Dec 17, 2019
        2 Answers
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        A:  Hi Constance, the measurements for this unit are; Display height and width 2.5/ 1.25 in. and the Product height and width: 3.3/ 3.1 in. Please, let us know if you have additional questions or concerns at 1-800-468-1502. We'd be glad to assist you.

        by|Dec 19, 2019

          A:  The outside dimensions are Product Depth (in.) .5 Product Height (in.) 3.3 Product Width (in.) 3.1

          by|Dec 20, 2019
            caret
            Q:Is this compatible for a 2-stage gas furnace?
            by|Nov 30, 2017
            1 Answer
            Answer This Question

            A:  Hello DIYer! I do apologize, but it would be difficult to determine if this Honeywell 7-Day Programmable Thermostat will be compatible with your HVAC system. However, I can tell you, this thermostat is compatible with most 2-way zone valves, 3-way zone valves or circulator pumps in both line volt and low volt applications. If you still need assistance in determining the compatibility of your system with this thermostat, please feel free to contact Honeywell Technical Support at (800) 468-1502.

            by|May 5, 2023
              caret
              Q:Does daylight savings and standard time change automatically ?
              by|Nov 20, 2017
              1 Answer
              Answer This Question

              A:  No, you have to set the day, hour and minute buttons on this model.

              by|May 5, 2023
                caret
                Q:hello i have a old style honeywell round 2 wire thermostat, can i replace it with this thermostat
                by|Nov 8, 2017
                1 Answer
                Answer This Question

                A:  Yes. You can replace your old round 2 wire thermostat with this one. The great thing about this thermostat is that it can be hooked up to low voltage (24 volt) systems, line voltage (120 volt) systems and 240 volt systems. I replaced the two old style thermostats in my house with two of these Honeywell units. One of my old thermostats was set up to run on 24 volts and the other one was still using the line voltage (120 volts). I wanted to install the same thermostat in both locations so that my family would not have any issues with setting them and using them. I installed my Honeywell thermostats over 5 years ago and they are nice way to get the programmability of modern thermostats, and have digital and more importantly, accurate control over your heat! As a reference, my home uses an oil fired boiler with hot water base board heat.

                by|Dec 23, 2020
                2 found this answer helpful
                caret
                Q:Is this one gas heat only?
                by|Dec 14, 2016
                1 Answer
                Answer This Question

                A:  Hi MayMay! Yes, this thermostat is heating only. This thermostat can be used to control the following heating systems: • gas, oil or electric systems • hot water heating • hot air system with no fan control • millivolt system (e.g., gas fireplace) • electric heating up to 1200 W @ 240 V max.

                by|May 4, 2023

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                  Features

                  Removable Interface

                  Auto Changeover, Backlit Display, Battery, Daylight Savings Time Ready

                  Auto Changeover, Backlit Display, Battery Back-Up, Filter Indicator, Lockable, Low Battery Indicator

                  Backlit Display, Lockable, Removable Interface, Vacation Mode

                  Power Options

                  Hardwired

                  Battery Operated

                  Hardwired

                  Hardwired

                  Thermostat Compatibility

                  Universal

                  Universal

                  Universal

                  Universal

                  Wire Configuration

                  2-Wire

                  2-Wire

                  C-Wire

                  2-Wire

                  Control Type

                  Manual

                  Touchscreen

                  Manual

                  Manual