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Thermo Cube Model TC-3: Thermostatically Controlled Outlet - On at 35-Degrees/Off at 45-Degrees

4.4 4.4 out of 5 stars 7,605 ratings
$14.53 with 9 percent savings
List Price: $15.99

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Purchase options and add-ons

Brand Thermo Cube
Model Name 335593
Color White
Specific Uses For Product Active
Included Components Aquatics, Aquariums, Aquariums

About this item

  • Plugs into a standard 15 amp electrical outlet and turns power on automatically according to ambient air temperature
  • Works with any 120V electrical device
  • Saves money by using power only when temperatures require heating
  • Two receptacles for use with more than one electrical device
  • Turns on as temperature falls to approximately 35°F, off as temperature rises above 45°F
  • Ideal for home and farm applications such as pond de-icers, unheated rooms, pump houses, greenhouses, boats and RV's

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Thermo Cube Model TC-3: Thermostatically Controlled Outlet - On at 35-Degrees/Off at 45-Degrees
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K&H Pet Products Submersible (No Float) Ultimate Pail & Bucket Water Deicer, Animal Water Heater, Tank Heater for Horses, Cat
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From the manufacturer

Model TC-1 Model TC-2 Model TC-3 Model TC-21 Model TC-22
See Details
See Details
Customer Reviews
—
4.2 out of 5 stars
314
4.4 out of 5 stars
7,605
4.3 out of 5 stars
261
—
Price — $16.10 $14.53 $17.99 —
Turns On Approximately 0°F (-18°C) 20°F (-7°C) 35°F (2°C) 78°F (26°C) 120°F (49°C)
Turns Off Approximately 10°F (-12°C) 30°F (-1°C) 45°F (7°C) 70°F (21°C) 100°F (38°C)
Typical Applications Automotive applications, including engine and battery heaters Automotive applications, including engine and battery heaters Home and farm: pond deicers, stock tank deicers, unheated rooms, pump houses, greenhouses, boats, RV's Home, farm and industrial fans: window, ceiling, exhaust, ventilators, attic, roof, air circulator, table fans, RV's, computer cooling Attic and roof fans, exhaust and ventilation fans, RV's, computer cooling

What's in the box

  • Aquatics, Aquariums, Aquariums

    • Looking for specific info?

    Product guides and documents

    User Guide (PDF)

    Product information

    Warranty & Support

    Thermo Cube Buying Guide View Guide [PDF ]

    Feedback

    Thermo Cube Model TC-3: Thermostatically Controlled Outlet - On at 35-Degrees/Off at 45-Degrees

    Thermo Cube Model TC-3: Thermostatically Controlled Outlet - On at 35-Degrees/Off at 45-Degrees

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    Added to Cart
    Price-9% $14.53
    List: $15.99    		$28.50$14.99$28.95$49.99
    Delivery
    Get it as soon as Friday, May 17
    Get it as soon as Friday, May 17
    Get it as soon as Friday, May 17
    Get it as soon as Friday, May 17
    Get it as soon as Friday, May 17
    Customer Ratings
    4.44.4 out of 5 stars7,605
    4.24.2 out of 5 stars64
    4.24.2 out of 5 stars173
    4.24.2 out of 5 stars1,885
    4.44.4 out of 5 stars3,620
    Easy to install
    4.6
    4.6
    4.2
    4.5
    —
    Easy to use
    4.4
    —
    4.0
    4.5
    4.0
    Temperature Control
    3.9
    3.5
    —
    3.9
    4.2
    Accuracy
    —
    3.5
    5.0
    3.8
    4.2
    Sold By
    Amazon.com
    WINNSAM LLC
    MAXKOSKO
    Green N Urban
    Inkbird
    control method
    application
    —
    application
    touch
    application
    power source
    Corded Electric
    Battery Powered
    ‎Electric
    —
    Corded Electric
    material
    Plastic
    —
    Acrylonitrile Butadiene Styrene (ABS)
    —
    Plastic
    shape
    Rectangular
    —
    Thermostatically Controlled Outlet
    Rectangular
    Rectangular
    mounting type
    —
    —
    Wall Mount
    Wall Mount
    Wall Mount
    has backlight
    ✗
    ✓
    ✗
    ✓
    ✓

    Product Description

    The Thermo Cube is a unique, patented electrical device that plugs into a standard 15 amp electrical outlet and turns power on automatically according to ambient air temperature, saving money by using power only when temperatures require heating or cooling. There are five models available with different temperature ranges to choose from. Each unit has two receptacles for use with more than one electrical dev ice. Cold weather model TC-3 turns on at approximately 35°F, and turns off as temperature rises above 45°F. It is ideal for home and farm applications such as pond de-icers, unheated rooms, pump houses, greenhouses, boats and RV's. One year limited warranty.

    Customer reviews

    4.4 out of 5 stars
    4.4 out of 5
    7,605 global ratings

    Customers say

    Customers like the performance, ease of installation, and amperage of the HVAC control thermostat. For example, they mention it works well, is effective, and is simple to apply. Some appreciate the value. That said, opinions are mixed on the turn on and off, temperature, and quality.

    AI-generated from the text of customer reviews

    1,386 customers mention975 positive411 negative

    Customers like the performance of the product. For example, they say it's simple and effective, and works well for their heaters in well houses. Some mention that it'd be a perfect solution for their well house.

    "We bought it for our Sweeter Heater for our chicken coop and it is perfect...." Read more

    "I bought this to use in my very large birdbath. Worked great through our first cold blast , kept water clear of ice...." Read more

    "...However, it does not work as advertised...." Read more

    "Seems to switch on sooner than 35 and off later than 45, but worked well for the heaters in my well houses." Read more

    161 customers mention161 positive0 negative

    Customers are satisfied with the value of the outdoor living product. They mention that it is good value for money, saves them time and money, and has built-in thermostats.

    "Good price, Good product" Read more

    "...Casing appeared to be of heavy construction.Price was right.Item was received in a timely manner.CON's:DOA...." Read more

    "Working fine, saving money by turning on light at 35 deg. F and turning it back off again at 45 deg. F. We love it." Read more

    "...All done simply and cost effectively. No expensive heaters with built in Tstats, no special wiring. A simple 120 volt receptacle to plug all into...." Read more

    143 customers mention137 positive6 negative

    Customers like the amperage of the product. They mention that it saves on electricity, energy, and labor. They also say that it performs the function of supplying power at temps below 35 degrees as advertised.

    "I like the idea of saving power and this they say will do that . I haven't plugged them in yet !" Read more

    "...Only turns on when needed, saving power and not overheating the waterers...." Read more

    "...It seems to be working well and it saves on electricity...." Read more

    "Thermocube works as described. It saves power by only turning on the appliance as needed." Read more

    97 customers mention88 positive9 negative

    Customers find the installation of the product to be easy. They mention that it's simple enough to be worth a try, and it saves them the hassle of having to remember to turn stuff on/off. They also say it works great and is weatherproof.

    "...wanted something to regulate the cycling at a reasonable cost and simple to apply. I have power inside my shed...." Read more

    "...Simple and effective, though according to my thermostat, it was coming on a bit early and staying on a bit long...." Read more

    "...Automation - saves you the hassle of having to remember to go turn stuff on/off.Cons:* The connections are tight...." Read more

    "...At 40 deg F it is on, otherwise it is off. Dead simple. Hard to beat...." Read more

    623 customers mention359 positive264 negative

    Customers are mixed about the quality of the HVAC control thermostat. Some mention it's well made, dependable, and holds up really well. However, others say that it didn't last long, broke quickly, and may have a minor manufacturing issue.

    "Good price, Good product" Read more

    "...Note that I wrote a *PAIR* of light bulbs. Light bulbs occasionally burn out and when they do you risk loosing your well pump (like I did)...." Read more

    "...the coop reaches 45° which is perfect for our chickens and gives us peace of mind!..." Read more

    "...This didn't prove a thing other than the fact it is defective...." Read more

    532 customers mention342 positive190 negative

    Customers have mixed opinions about the temperature of the outdoor living product. Some say it works to keep things from freezing, while others say the on and off temps are slightly off. Some customers also mention that the timers did not keep their pipes from freezing.

    "...Solved the problem. Heater comes on when temp drops down." Read more

    "...As it stands, the Thermo-Cube TC-3 is useless...." Read more

    "I have one of these controling a pair of light bulbs which keep my well pump from freezing. Note that I wrote a *PAIR* of light bulbs...." Read more

    "...Kept our girls warm and safe all winter in temps dipping down below zero." Read more

    86 customers mention27 positive59 negative

    Customers are mixed about the turn on and off of the HVAC control thermostat. Some mention that it turns on and automatically, while others say that it doesn't shut off until the temperature reaches 55 ° F.

    "...properly, depending on your application, you build easily loose power at a critical time. DO NOT BUY" Read more

    "Used it in my greenhouse. Did not switch on at 30. Actually, never turned on ever. Glad I tested it first!" Read more

    "...Automation - saves you the hassle of having to remember to go turn stuff on/off.Cons:* The connections are tight...." Read more

    "...up into the 55-57 range for most of the daytime and the Thermo Cube still doesn't turn off. Once it was on for about 5 days/24 hrs...." Read more

    97 customers mention11 positive86 negative

    Customers are dissatisfied with the size of the outdoor living product. They mention that the product is too large to fit into their exterior covered outlets, the ground prong seems too large on the power source side, and the sides of the product will not fit within the clear plastic housing that covers their outdoor outlet. Some say that the female ground connection had a sloppy fit and the prongs are too wide or not lined up.

    "can't use these because they are to wide to fit in my outdoor boxes due to cover clearance issues" Read more

    "...Also note that my cubes are used indoors (in a boat). They do fit a little tight into their receiving 120V plug-in but they do fit...." Read more

    "...It's as if the prongs are too wide or not lined up. When looked at in profile the 2 bladed prongs are not parallel to the grounding prong...." Read more

    "...stated, the ground pin seems larger than it should be and makes a VERY tight fit. I even squeezed it down as best I could knowing this issue...." Read more

    I'm devestated....like myplants
    3 Stars
    I'm devestated....like myplants
    Update on my previous review. I purchased this in November of 2022. It worked perfectly until this last weekend (February 2023)) when I was away and the weather turned very cold. It FAILED to turn on and is now DEAD! What a disappointment to have nursed these plants for the last 4 months and then to have it fail.
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    Top reviews from the United States

    James C.
    5.0 out of 5 stars Great product. Perfect for my application.
    Reviewed in the United States on April 12, 2024
    Verified Purchase
    I have a well for a water supply. The water line is buried deep enough that my pipes between the well and the house don't freeze, but at times I can experience issues with the tube from the pump to the pressure switch freezing up if I don't apply some heat to it. My solution is a standard heat lamp, and to extend the life of the bulb and minimize the cost of using it this little gizmo keeps it on enough to avoid it freezing but not enough to try to make things hot. It does exactly what I need for it to do.
    Helpful
     Report
    tom
    5.0 out of 5 stars ease of plug in
    Reviewed in the United States on April 17, 2024
    Verified Purchase
    This was not a recent buy. Used in a motorhome for an additional heater in the filter area in the underside of the motorhome to stop any freezing of the filter itself. Easily plug into socket and plug heater in it. Solved the problem. Heater comes on when temp drops down.
    Helpful
     Report
    Michael Galassi
    5.0 out of 5 stars Works great to keep a well pump from freezing
    Reviewed in the United States on March 12, 2024
    Verified Purchase
    I have one of these controling a pair of light bulbs which keep my well pump from freezing. Note that I wrote a *PAIR* of light bulbs. Light bulbs occasionally burn out and when they do you risk loosing your well pump (like I did). Use TWO light bulbs so if one burns out you still have some heat on your pump.
    One person found this helpful
    Helpful
     Report
    Jack
    4.0 out of 5 stars didn't fit under in use outdoor covers
    Reviewed in the United States on March 1, 2024
    Verified Purchase
    can't use these because they are to wide to fit in my outdoor boxes due to cover clearance issues
    Helpful
     Report
    Amazon Customer
    5.0 out of 5 stars Works Perfectly
    Reviewed in the United States on April 14, 2024
    Verified Purchase
    Good price, Good product
    Helpful
     Report
    Our View
    5.0 out of 5 stars Works great!
    Reviewed in the United States on March 13, 2024
    Verified Purchase
    We bought it for our Sweeter Heater for our chicken coop and it is perfect. Shuts the heater off when the coop reaches 45° which is perfect for our chickens and gives us peace of mind! Kept our girls warm and safe all winter in temps dipping down below zero.
    Helpful
     Report
    mike roark
    1.0 out of 5 stars My poor birds!
    Reviewed in the United States on February 18, 2024
    Verified Purchase
    I bought this to use in my very large birdbath. Worked great through our first cold blast , kept water clear of ice. But as happened with the last one I bought, two weeks after the return window closed it quit working. I did all the checks including plugging in a device that I know was working. I see no indication that this seller is willing to make it right after a small time has passed. Fifteen dollars for me is too expensive to repeatedly buy this product even though I love my birds as they are my primary source of entertainment. I am on permanent disability and don’t have many ways to get out especially when it is really cold. I really hope I get some sort of a reply from this seller to reinforce my belief in humanity to still take care of business with respect and trust that we all have when we make transactions with people we don’t know or even get to talk to. I am really hoping and praying for a positive outcome and resolution to this situation.
    Helpful
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    J. L.
    5.0 out of 5 stars It works.
    Reviewed in the United States on March 24, 2024
    Verified Purchase
    Seems to switch on sooner than 35 and off later than 45, but worked well for the heaters in my well houses.
    One person found this helpful
    Helpful
     Report

    Top reviews from other countries

    Myrna Laurie Davis
    5.0 out of 5 stars Works great
    Reviewed in Canada on February 7, 2024
    Verified Purchase
    Heat
    Report
    Amazon Customer
    4.0 out of 5 stars Handy unit to avoid power waste
    Reviewed in Canada on December 28, 2022
    Verified Purchase
    I got this to control a small heater I have in my tractor shed. I don't need heat all the time, just when the temperature drops below freezing as the heater is only intended to make it easier to start the tractor. This adapter is doing the trick and seems to work well at allowing power flow within the stated temperature ranges. In the past I had to remember to go out to the shed to turn the heater on if it looked like the weather was approaching freezing. Now the system looks after itself and I save power by not running the heater when it is not needed.
    Report
    Geoff-Vancouver
    5.0 out of 5 stars Brilliant idea
    Reviewed in Canada on April 30, 2024
    Verified Purchase
    We use this for a small space heater in our pumphouse for when it drops to -28 or colder outside. Which it never used to do, but now the winters have extreme colder.

    Our pumphouse was built at a time when it went to -25. Now with the destabilized arctic air masses in the winter we occasionally get overnight temperatures to -30. We plugged in a small ceramic heater to this magic plug and don’t have to worry about freeze ups.

    A small step to adapting to climate change.
    Report
    Tammy
    5.0 out of 5 stars Turn your item you want on
    Reviewed in Canada on December 28, 2023
    Verified Purchase
    The item you plug 🔌 into the unit will automatically turn on according to the temperature in the description
    Report
    Richard
    3.0 out of 5 stars Too big to fit inside an exterior covered outlet.
    Reviewed in Canada on November 25, 2023
    Verified Purchase
    Was really pleased to find this product, which I expected to do exactly what I needed it to - i.e., turning eavestrough de-icing cables on and off as needed based on the conditions outside, rather than just having them running for months on end (and wasting energy and money when not needed). Unfortunately, the cube is too wide fit inside the rain/snow cover of an exterior, covered outlet, so can't be used at all. This is too bad, given that exterior uses are one obvious, foreseeable use for such a cube. Keep this in mind if thinking about using it in such a location that needs to be covered because it's outside and exposed to the elements. If that's the case, you'll need to look for another, smaller product that will fit inside the cover.
    Report