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❄️ Stay Frost-Free & Power-Savvy with Thermo Cube!
The Farm Innovators TC-3 Thermo Cube is a patented thermostatically controlled outlet that automatically activates connected devices when temperatures fall below 35°F and turns off above 45°F. Designed for 120V, 15A outlets, it features two receptacles to power multiple devices simultaneously. Perfect for frost protection in farms, greenhouses, boats, and unheated rooms, it ensures energy-efficient heating only when needed, backed by a one-year limited warranty and thousands of satisfied users.



| ASIN | B0006U2HD2 |
| Additional Features | Frost Protection |
| Brand | Thermo Cube |
| Brand Name | Thermo Cube |
| Color | White |
| Control Method | Touch |
| Controller Type | Touch |
| Customer Reviews | 4.4 out of 5 stars 8,051 Reviews |
| Display Type | Digital |
| Global Trade Identification Number | 00750433200637 |
| Included Components | Aquatics, Aquariums, Aquariums |
| Item Dimensions D x W x H | 2"D x 8"W x 4"H |
| Item Length | 3 inches |
| Item Type Name | Farm Innovators Tc-3 Cold Weather Thermo Cube Thermostatically Controlled Outlet - On At 35-Degrees/Off At 45-Degrees |
| Item Weight | 3.2 ounces |
| Manufacturer | Farm Innovators, Inc. |
| Manufacturer Part Number | 335593 |
| Manufacturer Warranty Description | One year limited warranty. |
| Material Type | Plastic |
| Model Name | 335593 |
| Model Number | TC-3 |
| Mounting Type | Surface Mount |
| Number of Items | 1 |
| Power Source | Corded Electric |
| Product Dimensions | 2"D x 8"W x 4"H |
| Product Style | On at 35°F/Off at 45°F |
| Shape | Rectangular |
| Special Feature | Frost Protection |
| Specific Uses For Product | Active |
| Temperature Control Type | Thermostatic |
| UPC | 715120800767 723169605410 740528466789 746125090983 754034318951 750433200637 802201351468 617407735871 723169604840 752913190810 886827133103 |
| Unit Count | 1 Count |
| Voltage | 120 |
| Wattage | 1800 |
G**Y
love it
when i bought this i was a tad shy because of all the bad reviews and i was also entangled in a bitterness towards seller when i ordered it took several days for them to ship said in stock but it wasnt, after i received the product i realize takes a little gray matter to use it properly, i originally placed it an old style lamp holder you know like grandma used to have thats got a screw in socket with two outlets on the side, but the bulbs heat kept the unit from ever coming on at all, puzzled i finally figured that one out, i put the unit well away from any sources of heat inside my well house and used the 2 outlets one going to a small ceramic heater blowing on my well pump, the other to an extension cord ran outside with a mere childs night light attached, i also purchased a cheap digital thermometer the kind that transmits 100 feet and put receiver inside my home, the week i bought this we had record low temps here well into the low teens, i would check my remote thermometer inside and could see it maintained temp inside well house between 33 and 4o just as advertised , i could also peer out my window and see exactly when unit was operating via the night light placed outside on the extension cord, took me awhile to gain trust in the unit because of all the negative reviews but it works fantastically , i trust the unit has more than paid for itself in less than a month in saved power by maintaining just enough to prevent freezing without having to constantly run a bulb or heater, plus the peace of mind that my well doesnt freeze, i still check my remote thermometer and yep always between 33 and 40 and on really cold nights i can see the little night light come on assuring me its doing its job, i think the people giving the unit bad reviews either got a lemon or maybe not bright enough to use it properly as i did myself originally lol, but i give it A+ works great for me, if mine breaks ill be buying another great product ;-) Adam
C**C
Does the job if the temp is right
This is not waterproof, so I keep it protected out of the rain when used outside to turn on my heater used for the chickens water dispenser and a birdbath. If you use this on an outlet that is attached to a heated structure, it will not operate as advertised, the building residual heat will trick it into thinking it is warmer out than it is, you have to get it away from a heated building, unless your place is modern with tons of insulation and not like my 70 year old frame home.
T**Y
Did the job of protecting
Plug it in and be protected. I used this to regulate the heat tape on the hose and main connection point on our RV. It worked as advertised. Having 2 outlets was a real benefit for me.
R**K
Works but temp range is too big and not accurate.
Been using these for years for chicken/dog/cat heated bowls. They do work to conserve energy. but the thermostat is not that accurate. I have mine on a smart plug that measures wattage. They turn on around 37-38 and turn off close to 53 degrees. That means they run most of the winter unless you have very cold nights and warmer days. Ideally you would want this to come on around 33 and off at 40. Overall they're easy to deploy, cheap, and do technically work to keep things from freezing.
R**K
Works great, but keep it shaded from the sun!
These are great! Make sure you place it where it will be shaded from the sun! During the really cold (below 32) days during 2024 and this year, I had the block heater in my diesel truck plugged in all the time when I the truck was parked. Now with the wide temperature swings I used one of these units so I could still leave the block heater connected. I also have a small outdoor LED lamp plugged into the outlet so I know when the block heater is being powered. Several day ago I noticed that the block heater was off, but the outdoor temperature was 30 F. I wondered about that and decide to check this out. The sun was out and the outlet was in the sun. I moved the outlet into a shaded area and the heater came back on after a while. For the price, get two!
K**R
Keeps my heat pump from freezing up!
I recommend this product! It turns on my heat lamp before it freezes (36 I think) and turns it off at 45. So I can actually leave it plugged in all year because I use it to run 2 red lamps on my heat pump. I LOVE THIS!
S**E
Does not work. Don't waste your money. JUNK! ... Read my "EDITs" below.
The Farm Innovators TC-3 Cold Weather Thermo Cube Thermostatically Controlled Outlet was supposed to turn on at 35-Degrees F. Last night, 11/19/20, the outside temp dropped below 35 degrees F to 26 degrees F for the first time since purchase. That's 9 degrees F below the advertized "ON temp. I intended to use this to turn on a simple light bulb to protect my wellhead from freezing. (It's what you do here in the south.) EDIT mid NOV 2020: ... Could not find a way to "Contact Seller" on the Amazon site, so, I searched for "Farm Innovators" and found a phone number. I called and reached a customer service rep. I was told that ... "Sometimes the thermostat sticks. Put it in the freezer for 30 minutes and then, quickly, plug a lamp into it and the cube into an outlet to see if the light comes on. Then wait for it to turn off as it warms up." Well, I did this several times and it seems to work now. Seems like this tidbit of information should have been included in the packaging. However, I am sceptical as to whether or not I can trust this thing to work correctly 100% of the time. I will use a "test" lamp in my detached garage for a while to see if it works correctly. Edit 6 DEC 20: Once again the temps outside dipped to 28F and the device still does not work. The "test" lamp in my detached garage did not come on. I purposely set my alarm for 3 AM, the coldest time of the night, to see if the light would come on. I cannot trust this thing to keep the water pipe from my well from freezing. Unless they send me a unit that actually works ... IT'S JUNK!
G**.
Block heater plug
Great way for my engine heater in winter on my diesel tractor
N**T
Safe and Effective
Excellent product that works exactly as advertised.
J**N
Should be ok?
Feels inadequate, hence the 4 stars. If it survives Canadian winter and its elements, being on the vehicle full-time I'll update.
G**R
Brilliant idea
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.
C**N
A Remarkably Cost-Effective Way to Prevent Freeze-up
You simply can't beat this item for simplicity and cost-effectiveness. We bought it to keep an insulated shed from freezing so we could store a bumper crop of winter squash inside. Just plug in any non-digital heater (digitally-controlled heaters will often reset and won't automatically start up again) and the device takes care of the rest. We did find that the temperature range to be slightly warmer (6-10 deg Celcius) than advertised (2-7 deg) but this could have been a result of the device being located on a cooler outside wall. If we had wanted it cooler, we could have plugged the device into a short 12 ga extension to move it away from the wall, but the warmer temperature was all right for our purposes. Again, overall, you can't beat the simplicity and price of this solution.
H**S
Reliable
I connected this to the block heater on board my diesel pickup so that I can plug in my truck and have the on board charger top up my battery and kick in the block heater only if needed. This has continued to work flawlessly for years and the temperature set points are about right for my application. Other temperature switches I had bought in the past, simply didn’t last.
Trustpilot
2 months ago
1 week ago