120V Auto On/Off, Thermostat Plug for Heater & Heat Tape

Name: 120V Auto On/Off, Thermostat Plug for Heater & Heat Tape
Brand: YeloDeer
SKU: 1pc
Price: 14.99 USD
Availability: InStock

Compact Plug-In Design 15A Max Load Auto 37°F ON / 50°F OFF

$14.99 USD

Quantity 1 pc

1 pc
2 pcs
3 pcs

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Overview

Compact Temperature Control Plug for Automatic Freeze Protection

A simple thermostat plug for heaters and heat tape. It automatically supplies power when surrounding temperature approaches freezing and switches the connected device off as conditions warm.

Compact Plug-In Design Best for roomy indoor or sheltered 120V outlets where an extended cord is not needed.

Automatic Freeze Control Turns ON around 37°F / 3°C and OFF around 50°F / 10°C.

15A Maximum Confirm the connected heating-device load before use.

No Programming Fixed mechanical thermostat with automatic operation.

Before You Order

Device: Compatible 120V heating equipment Maximum current: 15A Control: Fixed automatic temperature Heating only: Not for cooling equipment Design: Standard compact plug adapter Auto restart: Device must safely restart when powered Outdoor use: Outlet cover must close completely Moisture: Plug and connection must remain protected

Check outlet-cover clearance before choosing this version. The standard plug body can interfere with some weatherproof outdoor covers. If the cover cannot close correctly, do not force it or leave the connection exposed.

Compact Plug or Extension Cord?

Choose This Compact Plug Best when the outlet has enough clearance and you want the simplest thermostat plug without an extra cord.

Choose the 20 in Cord Version Better for outdoor weatherproof outlet covers that need extra clearance between the receptacle and thermostat body.

Using a covered outdoor outlet? Compare the YeloDeer Thermostat Extension Cord →

Thermostat plug for heater with automatic low temperature control Compact temperature controlled outlet plug dimensions 120V temperature controlled plug with 15A maximum current

Applications

Temperature control plug for greenhouse chicken coop bird bath and heated pet bowl

Pipe Heat Tape

Heating Cable Freeze Protection 120V Heat Tape

Provides simple automatic freeze-temperature power control for compatible heat tape.

Animal & Water Heating

Heated Bowls Chicken Coops Bird Baths

Suitable for compatible 120V heating devices that can safely cycle automatically.

Greenhouse & Utility Areas

Greenhouses Pump Houses Well Houses

Useful where simple automatic freeze protection is enough and adjustable control is not required.

Sheltered Winter Heating

Garages Sheds Small Heaters

The compact plug format works best where the outlet has adequate space around the thermostat body.

Outdoor Outlet Limitation

Do not leave a weatherproof cover partly open just to accommodate this plug. If the adapter prevents the cover from closing properly, use the slim thermostat extension cord version instead.

Not Suitable For

Cooling fans or ventilation control
Air conditioners, refrigerators, freezers, or compressors
240V equipment
Electric floor heating or baseboard heating systems
Loads above 15A
Applications requiring adjustable temperature settings
Locations where the weatherproof cover cannot close
Standing water or submerged electrical connections

Specifications

Product Type	Temperature control plug / thermostatically controlled outlet
Control Logic	Heating only
Voltage	120V AC
Maximum Current	15A
Control Type	Fixed-temperature mechanical thermostat
Typical Activation Temperature	Approx. 37°F / 3°C
Typical Shutoff Temperature	Approx. 50°F / 10°C
Design Type	Compact plug-in adapter
Approx. Body Size	2.6 × 1.8 × 1.3 in
Indicator Light	Shows when the controlled outlet is active
Setup	Plug-and-play
Temperature Adjustment	No
Available Quantities	1 pc, 2 pcs, or 3 pcs

The switching temperatures are approximate. Mechanical thermostats have normal tolerance, so two units may activate at slightly different temperatures.

Installation

Basic Setup

Confirm the connected heating device operates on 120V.
Confirm its total current does not exceed 15A.
Confirm the device can safely restart when electrical power returns.
Plug the thermostat directly into the receptacle.
Plug the compatible heating device into the controlled outlet.
Position the thermostat where surrounding air represents the temperature you want to monitor.
For outdoor-related use, confirm the weatherproof cover can close completely.
Test operation before freezing weather.

Placement

Do Expose the thermostat to representative cold air conditions.

Do Not Place it directly beside a heater, under insulation, next to a warm vent, in direct sunlight, or in standing water.

Never compromise weather protection for plug clearance. If this adapter prevents an outdoor cover from closing, switch to the slim extension-cord version.

FAQ

What does this temperature control plug do?

It automatically supplies power to a compatible heating device when surrounding temperature approaches freezing, then switches the device off as the temperature rises.

When does the thermostat plug turn on and off?

Typical operation is ON around 37°F / 3°C and OFF around 50°F / 10°C. Mechanical thermostat tolerance means the exact switching temperature can vary slightly.

Can I use this thermostat plug with a heater?

Yes, when the heater operates on 120V, remains within the 15A rating, is approved for external thermostat control, and can safely restart automatically after power is restored.

Can I use it with pipe heat tape?

Yes, if the heat tape is compatible with external thermostat control and remains within the controller's electrical rating.

Can I use this plug in a covered outdoor outlet?

Only if the weatherproof cover can close completely with the adapter installed. If the plug body interferes with the cover, choose the 20 in thermostat extension cord version instead.

Why is the indicator light off?

The light is on when the thermostat has activated the controlled outlet. During warmer conditions, the thermostat may remain plugged in while the outlet and indicator stay off.

Why do two thermostat plugs switch at slightly different temperatures?

This is normal for mechanical thermostats. Their switching point has a tolerance range and is not intended to behave like a precision digital temperature controller.

Guides

Mechanical freeze-protection controls may switch slightly earlier or later than their nominal rating. Learn how temperature direction, tolerance, and hysteresis affect operation.

Read the Mechanical Thermostat Guide →

If you are using the plug with self-regulating pipe heat tape, learn the difference between self-regulating heat output and thermostat-controlled electrical power.

Read the Heat Tape Thermostat Guide →

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120V Auto On/Off, Thermostat Plug for Heater & Heat Tape