MAXKOSKO Temperature Controlled Extension Cord, Thermostat Outlet with 20" Cord
192 in stock
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Description
Temperature Controlled Extension Cord for 120V Heaters
MAXKOSKO Temperature Controlled Extension Cord automatically switches compatible 120V heating devices on when the surrounding temperature approaches freezing and turns them off after the temperature rises.
The slim 20-inch extension cord design provides more placement flexibility than a bulky thermostat plug, making it especially useful with covered outdoor outlets and weatherproof in-use covers.
No temperature setting, app, programming, or permanent wiring is required. Simply connect the thermostat cord to a 120V outlet and plug the compatible heating device into the controlled receptacle.
Automatic Freeze Control
Typically turns connected heating devices on near 37°F (3°C) and off near 50°F (10°C).
Slim 20-Inch Cord
Provides flexible plug placement and can fit more easily beneath many covered outdoor outlet enclosures.
Plug-and-Play Setup
No wiring or programming is required. Plug in the controller, then connect a compatible 120V heating device.
Power Indicator Light
The indicator illuminates when the controlled outlet is active and supplying power to the connected device.
Reduced Heater Runtime
Automatically stops power after temperatures rise, helping avoid running winter heating equipment continuously.
1-Pack or 2-Pack
Choose one thermostat cord for a single location or two independent units for separate heating applications.
Important Before Ordering
Confirm Your Application Before Purchase
Fixed Temperature Control: This is a mechanical thermostat with preset on and off temperatures. The temperature thresholds cannot be adjusted.
120V Heating Devices Only: Use only with compatible 120V heating equipment that can safely restart automatically when power is supplied.
Normal Temperature Tolerance: Mechanical thermostats may activate at slightly different temperatures. Small variations between individual units are normal.
Not for Precise Temperature Control: Choose an adjustable digital thermostat with a remote sensor when your application requires a specific set temperature.
Keep Connections Protected: The slim design is suitable for covered outdoor outlets, but all plugs, outlets, and electrical connections must remain dry and protected from rain, snow, and standing water.
Heating Equipment Only: Do not use with refrigerators, freezers, air conditioners, cooling fans, compressors, floor heating systems, baseboard heaters, whole-home HVAC equipment, or 240V appliances.
Avoid Overloading: Confirm that the connected device is within the safe ratings of the thermostat cord, wall outlet, and electrical circuit.
Why Choose the Extension Cord Version?
Better for Covered Outlets
The slim extension-style design can reduce plug crowding and help many weatherproof outlet covers close more easily.
Flexible Sensor Placement
The extended cord allows the thermostat portion to be positioned where it can sense the actual cold environment.
No Control Panel Required
A practical option when you need simple automatic freeze protection without adjustable settings or a digital display.
Specifications
| Product Type | Temperature Controlled Extension Cord |
| Control Type | Fixed-Temperature Mechanical Thermostat |
| Operating Voltage | 120V AC |
| Typical Activation Temperature | Approximately 37°F (3°C) |
| Typical Shutoff Temperature | Approximately 50°F (10°C) |
| Cord Length | 20 in |
| Temperature Adjustment | Not Adjustable |
| Indicator Light | Shows When the Controlled Outlet Is Supplying Power |
| Installation | Plug-and-Play |
| Available Options | 1-Piece Pack or 2-Piece Pack |
| Recommended Equipment | Compatible 120V Heating Devices Safe for Automatic On/Off Control |
Recommended Applications View Applications Hide Applications
This automatic thermostat cord is intended for compatible 120V heating devices used for winter freeze protection.
Pipe Freeze Protection
Compatible pipe heat tape, self-regulating heating cable, and constant-wattage pipe heating cable without suitable built-in control.
Animal Water Systems
Compatible heated pet bowls, poultry water heaters, bird bath de-icers, and chicken coop heating devices.
Outdoor Utility Areas
Compatible greenhouse, pump house, well house, shed, garage, and small outdoor heating equipment.
RV Winter Protection
Compatible 120V heating accessories used to protect selected RV water systems and winter utility areas.
Check the Connected Device
Automatic Restart: The heating device must be able to resume operation automatically whenever the thermostat restores power.
Built-In Thermostat: If the connected heat tape already has its own thermostat, it will operate only when both thermostats allow power.
Indoor or Protected Outdoor Use: Outdoor plugs and receptacles require suitable weatherproof protection.
Basic Setup & Placement View Steps Hide Steps
Step 1: Check the Heater
Confirm that the connected equipment operates at 120V and is suitable for automatic on and off control.
Step 2: Connect the Controller
Plug the temperature controlled extension cord into a suitable 120V electrical outlet.
Step 3: Connect the Heater
Plug the compatible heating device into the thermostat-controlled receptacle.
Step 4: Position the Thermostat
Place the thermostat portion where it can sense the actual temperature of the area requiring freeze protection.
Step 5: Protect the Connection
Keep the outlet and plug connection dry. Confirm that any outdoor in-use cover closes without pinching the cord.
Step 6: Test Before Winter
Test the controller and connected heating device before severe freezing conditions arrive.
Thermostat Placement Matters
Sense the Actual Cold Area: Position the thermostat where it experiences the conditions that should activate the connected heater.
Avoid Heat Sources: Do not place the thermostat directly against the heater, heating cable, warm pipe, or other heat-producing equipment.
Avoid Warm Enclosures: Do not place it inside a heated enclosure when it is intended to control outdoor freeze protection.
Avoid False Readings: Keep the thermostat away from direct sunlight, insulation, standing water, and areas where snow can completely bury the controller.
Frequently Asked Questions
At what temperature does the extension cord turn on and off?
It typically activates near 37°F (3°C) and switches off near 50°F (10°C). Because it uses a mechanical thermostat, the actual switching temperature may vary slightly.
Can I adjust the activation temperature?
No. This product has preset temperature control and does not include an adjustable thermostat. Use a digital controller with a remote sensor when a specific set temperature is required.
Why is the indicator light off after I plug it in?
The indicator light turns on only when the thermostat activates the controlled outlet. If the surrounding temperature is above the activation range, the outlet and indicator light remain off.
Why do two controllers activate at slightly different temperatures?
Small differences are normal because this product uses a mechanical thermostat. Individual units may turn on or off at slightly different temperatures while still operating correctly.
Can it be used with pipe heating cable?
Yes, when the heating cable operates at 120V, is within the safe electrical load, and can be controlled by an external thermostat.
What happens if the heat tape already has a built-in thermostat?
The heating cable will receive power only when both the extension cord thermostat and the cable’s built-in thermostat call for heat. An additional controller may not be necessary for every thermostatically controlled cable.
Can this product be used outdoors?
It can be used for protected outdoor applications when connected to an appropriate outdoor outlet. All plug and outlet connections must be kept dry beneath a suitable weatherproof in-use cover.
Can I use it with a refrigerator, freezer, or cooling fan?
No. It is intended for compatible heating equipment only. Do not use it with cooling appliances, compressor equipment, HVAC systems, or 240V devices.
What is the difference between the 1-pack and 2-pack?
The 1-pack includes one independent thermostat extension cord. The 2-pack includes two separate controllers for two outlets or heating applications.
Before Connecting Your Heater
Confirm the following before using the temperature controlled extension cord:
- The connected device operates at 120V.
- It is a heating device rather than cooling or compressor equipment.
- It can safely restart automatically when power is restored.
- Its electrical load will not overload the controller, outlet, or circuit.
- The thermostat can sense the actual cold environment.
- Outdoor plug connections will remain dry and protected.
- You do not require an adjustable temperature setting.
Questions & Answers
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