With its familiar circular design and simple twist action, The Round® Non-Programmable Thermostat makes setting your ideal temperature quick and easy. Plus, the popular thermostat design fits perfectly into your home. Classic round styling; familiar design looks great in any environment Decorative cover ring hides wall marks Precise temperature control of plus/-1 degree F Easy to install and use Mercury Free
13 reviews for Honeywell Home CT87K1004 The Round Heat Only Manual Thermostat,Large,White,Large
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Rice –
Nice
Works properly. Decent price. Very easy to install. Looks great. Would purchase again.
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Jake Haligan –
Easy install.
Easy install and works fine – steady temp in my rooms.
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Music lover –
Great item
Sometimes digital is overkill! This works great, simple to use
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Quail –
Defective unit. I will try again.
I love this design, and had two of the same Honeywell Home CT87K1004 that functioned perfectly for many years, then failed. I wanted to replace them with the same style and simple functionality. However, this one arrived and will ONLY stay on, with no ability to moderate the temperature . To turn the heat off, even with the temperature set at 45, it still turns on the boiler for the radiant heat in its zone. I called Honeywell which wanted to trouble shoot, but the upshot from them ultimately was “return it to Amazon, it usually works.” So I am returning it and am hoping the next one I receive will not be defective like this one was.
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Ashton Brown –
I don’t find this collection of Reviews compelling; few understand how a thermostat works, etc.
See the review by John, 2-17-13 for an explanation of the (rare..) use of the 10+ year-life battery inside, as is there to 1) reset after a power failure and 2) initially after install: to charge up a capacitor which actually feeds the internal electronics and which is constantly replenished by the 24-28 V. AC power delivered usually by the furnace electrics when its own power is on (24/7.) Those 24~28 Volts A/C come via a small step-down transformer usually located within the furnace box.That said, recently I did have an -87K unit fail after some 4-5 years (I have no *reliable* info on the failure rates on the hundreds of thousands of these units in service, and individual guesstimates are useless/just gossip.) As I “do electronics” I naturally performed a necropsy on unit. The nominal 3 V battery in that was near-new at 3.22V on a Fluke prof. meter; it did not die via “battery failure”—see above, again—the few occasions where its small power input would actually be missed. I still wanted the natural simplicity of the glass-sealed mercury capsule, but I do realize that the mission of a thermostat/in 2018 is trivial to design and I Saw that the circuit board in my failed unit is comparable quality to that seen in prof. grade test equipment: so I was just unlucky in this early failure (most failures happen on initial turn-on, then ..during first days/weeks until: they go a long….time and then fail for complex reasons.) Four or so years IS … unexpected. Hence the 4-stars, pending..I just bought another -87K unit from Amazon. It was a 3-second “drop it in and carefully press down till it latches” operation (no wiring had to be done.) I left it alone with temp turned all the way down for 5 min. or so: letting that capacitor charge up to its working voltage from the battery. While it’s only been a couple days, it is doing exactly what you want it to do: silently switch on the permission for furnace to take over. Note that: the manner/temperatures at which the furnace decides finally *to turn OFF* its blower motor is Not anything to do with the thermostat’s ON/OFF decisions: a variety of means are engineered within furnace controls to cover this so-called “hysteresis” time + temp process. Your thermostat is an ON/OFF switch ONLY.I’ll drop in and modify this report should this new unit fail shortly (unless, of course: many are already in caves, say? No reports then. No furnaces either.)
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Hans K. –
Great upgrade for 1970 two wire units
Simple install , value for money . Easy instructions , quality unit , nice display , recommended .
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Nitzy y Edith –
Good and easy thermostat !
Excellent purchase!!!
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Gizmo31 –
Easy to install and cheap, but don’t last long
It’s losing a star because the other one was only two years old and broke. It’s easy to install. Manual, so no programming. The price is on the low end and temperature control is self explanatory. But I’ve replaced two of them to date and both were approximately 2 years old. So, a bit annoyed.
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Robert Duval –
très pratique pour personnes âgée
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Charlie’s G. –
It fit and worked correctly
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william stanton –
after having two digital thermostats only worked half the time I now get my but up an adjust the temp my self
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dcg –
Bought 2. One works fine, the other has been replaced twice.
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Meghan1181 –
The bottom gauge is stuck on 90 degrees. I called Honeywell for an exchange and they wouldn’t exchange unless I got a contractor to give a written statement saying that it doesn’t work? Don’t buy this product unless you want to waste your money
Rice –
Nice
Works properly. Decent price. Very easy to install. Looks great. Would purchase again.
Jake Haligan –
Easy install.
Easy install and works fine – steady temp in my rooms.
Music lover –
Great item
Sometimes digital is overkill! This works great, simple to use
Quail –
Defective unit. I will try again.
I love this design, and had two of the same Honeywell Home CT87K1004 that functioned perfectly for many years, then failed. I wanted to replace them with the same style and simple functionality. However, this one arrived and will ONLY stay on, with no ability to moderate the temperature . To turn the heat off, even with the temperature set at 45, it still turns on the boiler for the radiant heat in its zone. I called Honeywell which wanted to trouble shoot, but the upshot from them ultimately was “return it to Amazon, it usually works.” So I am returning it and am hoping the next one I receive will not be defective like this one was.
Ashton Brown –
I don’t find this collection of Reviews compelling; few understand how a thermostat works, etc.
See the review by John, 2-17-13 for an explanation of the (rare..) use of the 10+ year-life battery inside, as is there to 1) reset after a power failure and 2) initially after install: to charge up a capacitor which actually feeds the internal electronics and which is constantly replenished by the 24-28 V. AC power delivered usually by the furnace electrics when its own power is on (24/7.) Those 24~28 Volts A/C come via a small step-down transformer usually located within the furnace box.That said, recently I did have an -87K unit fail after some 4-5 years (I have no *reliable* info on the failure rates on the hundreds of thousands of these units in service, and individual guesstimates are useless/just gossip.) As I “do electronics” I naturally performed a necropsy on unit. The nominal 3 V battery in that was near-new at 3.22V on a Fluke prof. meter; it did not die via “battery failure”—see above, again—the few occasions where its small power input would actually be missed. I still wanted the natural simplicity of the glass-sealed mercury capsule, but I do realize that the mission of a thermostat/in 2018 is trivial to design and I Saw that the circuit board in my failed unit is comparable quality to that seen in prof. grade test equipment: so I was just unlucky in this early failure (most failures happen on initial turn-on, then ..during first days/weeks until: they go a long….time and then fail for complex reasons.) Four or so years IS … unexpected. Hence the 4-stars, pending..I just bought another -87K unit from Amazon. It was a 3-second “drop it in and carefully press down till it latches” operation (no wiring had to be done.) I left it alone with temp turned all the way down for 5 min. or so: letting that capacitor charge up to its working voltage from the battery. While it’s only been a couple days, it is doing exactly what you want it to do: silently switch on the permission for furnace to take over. Note that: the manner/temperatures at which the furnace decides finally *to turn OFF* its blower motor is Not anything to do with the thermostat’s ON/OFF decisions: a variety of means are engineered within furnace controls to cover this so-called “hysteresis” time + temp process. Your thermostat is an ON/OFF switch ONLY.I’ll drop in and modify this report should this new unit fail shortly (unless, of course: many are already in caves, say? No reports then. No furnaces either.)
Hans K. –
Great upgrade for 1970 two wire units
Simple install , value for money . Easy instructions , quality unit , nice display , recommended .
Nitzy y Edith –
Good and easy thermostat !
Excellent purchase!!!
Gizmo31 –
Easy to install and cheap, but don’t last long
It’s losing a star because the other one was only two years old and broke. It’s easy to install. Manual, so no programming. The price is on the low end and temperature control is self explanatory. But I’ve replaced two of them to date and both were approximately 2 years old. So, a bit annoyed.
Robert Duval –
très pratique pour personnes âgée
Charlie’s G. –
It fit and worked correctly
william stanton –
after having two digital thermostats only worked half the time I now get my but up an adjust the temp my self
dcg –
Bought 2. One works fine, the other has been replaced twice.
Meghan1181 –
The bottom gauge is stuck on 90 degrees. I called Honeywell for an exchange and they wouldn’t exchange unless I got a contractor to give a written statement saying that it doesn’t work? Don’t buy this product unless you want to waste your money