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Internet # 100476730

Model # CT87K

Store SKU # 376234

Round Non-Programmable Thermostat with 1H Single Stage Heating

$2998
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  • "The Round" thermostat is the world's most popular thermostat
  • Mercury free thermostat
  • Precise temperature control for heat only systems
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Product Details

Embrace simplicity with The Round Non-Programmable Thermostat. The reliable, readable scale makes setting the exact temperature easy - including a model with large, raised markings and clicks at every 2-degree change so you can see and hear the change. Plus, the popular, familiar design fits effortlessly into your home decor.

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From the Manufacturer

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Specifications

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Questions & Answers

133Questions
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Q:I thought this would be a good replacement for my old mercury 2-wire 120v thermostat that controls my gas boiler. But I just noticed that its 24v. I'm having a hard time finding a 120v replacement. Can anyone recommend another thermostat?
by|Sep 21, 2023
1 Answer
Answer This Question

A:  Hi, thanks for the question, to determine a compatible replacement we would need to know further information about the boiler, you can get in touch with us for support at 800-633-3991. -Joey

by|Sep 22, 2023
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    Q:How to install
    by|Sep 3, 2023
    1 Answer
    Answer This Question

    A:  Hi 1222ct87n4450, if you have a heat only 24 VAC system with 2 wires you have to connect one wire to R and the other one to W. If this is not the system type that you have or have more wires, please contact our tech support team at (800) 633-3991 or send us a Private Message to our Honeywell Home Facebook account. - Maria

    by|Sep 4, 2023
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      Q:can this thermostat be used on an A/C system that has no heat strips or heat pump? we are needing just a on-off temperature switch for A/C compressor nothing more... THANX
      by|Aug 22, 2023
      1 Answer
      Answer This Question

      A:  Hi gizmo, this thermostat is not compatible with cool only systems, it works with heat only systems. Feel free to contact our tech support team at (800) 633-3991 or send us a Private Message to our Honeywell Home Facebook account and we will be happy to recommend you a suitable model. - Maria

      by|Aug 23, 2023
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        Q:Can this replace the Honeywell T8775C?
        by|Jul 6, 2023
        1 Answer
        Answer This Question

        A:  Hi Taoshum, thank you for reaching out with this question. Yes, you can replace your previous thermostat with the T87K. Please be advised that the T87K is a power stealing thermostat and will need to charge off of your 24v and your heating wire for a couple of hours out of the box before you begin using it to control your system. If you have any additional questions, please reach out to our support team on Facebook/Twitter @HoneywellHome with a private message. Our hours: Monday - Friday 9 am to 6 pm CDT & Saturday - Sunday 9 am – 5 pm CDT. We look forward to hearing from you soon. -Paul

        by|Jul 6, 2023
          Showing 1-4 of 133
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          Customer Reviews

          3.9 out of 5
          (735)
          • 3.9
            out of 735 reviews
          • 68% recommend this product
          Filter by:
          Showing 1-10 of 735 reviews
          Needed to replace an old thermostat. Which was a Honeywell...
          Needed to replace an old thermostat. Which was a Honeywell I installed 25 years ago. Honeywell makes good products. Easy to install & use. This was for heat only.
          by
          • Verified Purchase
          Honeywell thermostat
          Great product easy to install
          by
          • Verified Purchase
          • Recommended
          I needed to change out 4 old thermostats two were...
          I needed to change out 4 old thermostats two were not working and the other two I couldn’t read, I specifically replaced with the Honeywell because they are easy to read and instal, I would recommend anyone needing to replace their thermostats to go with Honeywell because they are aesthetically appealing and practical compared to others.
          by
          • Verified Purchase
          1 found this review helpful
          Works
          Works
          by
          • Verified Purchase
          • Recommended
          1 found this review helpful
          Easy to intall easy to operate
          Easy to intall easy to operate
          by
          • Verified Purchase
          • Recommended
          3 found this review helpful
          been working just fine. and easy to install and use.
          been working just fine. and easy to install and use.
          by
          • Verified Purchase
          • Recommended
          Easy to install...
          Easy to install
          by
          • Verified Purchase
          3 found this review helpful
          Simple Installation, does the job.
          The instructions were very clear, I did verify it with a YouTube video to be sure I connected it correctly. Took longer to read the instructions than to install the thermostat. It's old-school style and function but fits in my 'tiny house' 1962 mobile home very well! As you can see, still working on it. It doesn't have an 'off' setting so I have to either turn the thermostat down well below a temp that would fire it up, or use the shut off on the furnace. Not difficult, just something to be aware of.
          by
          • DIY
          • Verified Purchase
          • Recommended
          12 found this review helpful
          by
            Really like this thermostat, easy to install and works great. Price was good.
            by
              Showing 1-10 of 735 reviews

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              Ratings
              (735)
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              Thermostat TypeHeatHeatHeatHeat
              Operation TypeMechanicalDigitalMechanicalMechanical
              FeaturesNo Additional FeaturesBattery, Low Battery IndicatorNo Additional FeaturesNo Additional Features
              Power OptionsHardwiredHardwiredHardwiredHardwired
              Wire Configuration2-WireC-Wire2-Wire4-Wire
              Thermostat CompatibilityUniversalBaseboard HeaterUniversalUniversal
              Heating & Cooling System TypeSingle StageSingle StageSingle StageSingle Stage
              Voltage (V)24 V30 V120/240 V120/240 V
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