Digital Attic Fan Thermostat for Exhaust Fans, 120V with Timer

Name: Digital Attic Fan Thermostat for Exhaust Fans, 120V with Timer
Brand: YeloDeer
SKU: EF03-CS
Price: 17.99 USD
Availability: InStock

3A / 360W Fan Load 14–104°F Cooling Control 10H Timer + 6.6 ft Probe

$17.99 USD

In stock

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Overview

Digital Attic Fan Thermostat for Automatic Heat Ventilation

Digital attic fan thermostat for 120V exhaust and ventilation fans This digital attic fan thermostat automatically turns a compatible 120V attic, exhaust, or ventilation fan on when the sensed temperature rises above your setting, then turns it off after the space cools.

Cooling Control Only Fan turns ON when temperature becomes too high.

3A / 360W Fan Max Check the fan nameplate before ordering.

14–104°F Setting Range Adjust the fan activation temperature from -10°C to 40°C.

10H Timer + 6.6 ft Probe Remote temperature sensing with optional timed control.

Before You Order

Best for: Attic, gable, exhaust, and ventilation fans Voltage: 120V AC Maximum fan load: 3A / 360W Connection: Plug-in fan required Fan restart: Must safely restart when power returns Control logic: Cooling only Probe: 6.6 ft external sensor included Location: Controller and outlet must remain dry

Use the 3A / 360W fan rating when checking compatibility. The controller also has a 10A / 1200W resistive-load rating, but ventilation fans are motor loads. Do not use the resistive rating to justify a larger fan.

Not for compressor cooling equipment. Do not connect an air conditioner, refrigerator, freezer, compressor, or compressor-based dehumidifier even if its listed wattage appears to be within the controller rating.

Cooling or Heating?

Attic fan thermostat with 10 hour timer temperature differential and calibration

Choose This Attic Fan Thermostat For a fan that should turn ON when attic or room temperature rises above the selected temperature.

Choose the Heating Thermostat For heat tape, heating cable, heat mats, or other compatible heaters that should turn ON when temperature falls.

Need heating control instead? See the YeloDeer Digital Plug-In Heating Thermostat →

Attic exhaust fan thermostat for attic greenhouse and ventilation applications Digital fan thermostat for attic ventilation greenhouse and equipment cooling How a thermostat controlled attic fan turns on and off by temperature

Applications

Attic & Exhaust Fan Temperature Control

Attic Fans

Attic Fan Thermostat Temperature Control Automatic Ventilation

Automatically starts a compatible attic fan when temperature rises above the selected setting.

Gable & Attic Vent Fans

Gable Fans Attic Vent Fans Hot Attic Spaces

Works as a temperature-controlled switch for compatible plug-in attic ventilation fans.

Exhaust & Duct Fans

Exhaust Fans Inline Duct Fans Heat Removal

Provides automatic exhaust fan thermostat control when accumulated heat needs ventilation.

Greenhouse Ventilation

Greenhouse Fans Grow Rooms Air Circulation

Controls compatible ventilation fans according to representative air temperature.

How the Attic Fan Thermostat Works

The external probe monitors temperature in the attic or ventilation area.

Temperature rises above setpoint: Fan turns ON Temperature falls below setpoint minus differential: Fan turns OFF

Example: Set the attic fan temperature to 85°F with a 10°F lower limit. The fan starts when temperature rises above 85°F and stops after temperature falls below approximately 75°F.

Adjustable Temperature Differential

The lower-limit setting can be adjusted from 1–20°F / 1–10°C.

Smaller Differential Keeps temperature closer to the setpoint but may cause the attic fan to cycle more frequently.

Larger Differential Reduces fan cycling but allows a wider temperature change before the fan turns off.

Probe Placement

Good Placement Place the probe where it measures representative attic or room air temperature.

Avoid Direct sunlight, roof decking, hot metal, direct fan airflow, grow lights, or isolated heat sources.

Not Suitable For

Heating cables or heat tape
Heat mats, heating pads, or space heaters
Air conditioners
Refrigerators or freezers
Compressors
Compressor-based dehumidifiers
Fans above 3A / 360W
Hardwired fans without a compatible plug
Wet or exposed outdoor electrical installations
Critical life-safety systems

Specifications

Product Type	Digital attic fan thermostat / plug-in cooling controller
Model	EF03-CS
Primary Application	Attic, exhaust, inline duct, and ventilation fan control
Control Logic	Cooling — output turns on when sensed temperature rises above the setpoint
Power Supply	120V AC, 60Hz
Maximum Fan Load	3A / 360W at 120V
Maximum Resistive Load	10A / 1200W at 120V
Temperature Setting Range	14°F to 104°F / -10°C to 40°C
Temperature Display Range	-22°F to 158°F / -30°C to 70°C
Temperature Units	°F / °C switchable
Lower Limit / Differential	1–20°F / 1–10°C adjustable
Default Lower Limit	10°F / 5°C
Sensor Calibration	±9°F / ±5°C
Timer	0–10 hours
Sensor Probe Length	6.6 ft / 2 m
Outlet Cord Length	7.8 ft / 2 m
Forced Cooling Mode	Supported
Factory Reset	Supported
Installation Type	Plug-in; no hardwiring required

Fan load and resistive load are not interchangeable ratings. When using this as an attic fan thermostat or exhaust fan thermostat, stay within the 3A / 360W fan limit.

Installation

Before Setup

Confirm fan is 120V AC Confirm fan is 3A or less Confirm fan is 360W or less Confirm the fan has a compatible plug Confirm automatic restart is safe Choose a representative probe location Keep the controller dry Test operation before unattended use

Basic Setup

Check the fan nameplate for voltage, amperage, and wattage.
Place the 6.6 ft sensor probe in the attic or ventilation area you want to monitor.
Keep the probe away from direct sunlight, localized heat sources, hot surfaces, and direct fan airflow.
Plug the thermostat into a grounded 120V AC outlet.
Plug the compatible attic or exhaust fan into the thermostat outlet.
Set the desired fan activation temperature.
Adjust the lower-limit differential if needed.
Set the timer only if a limited operating period is desired.
Verify at least one complete fan ON/OFF cycle before leaving the system unattended.

Timer vs Forced Cooling

0–10 Hour Timer Limits how long thermostat-controlled operation remains active. The fan still turns on and off according to temperature during the timed period.

Forced Cooling Mode Runs the connected fan continuously regardless of sensed temperature for testing or temporary ventilation.

If the Fan Cycles Too Often

Check whether the probe is in direct fan airflow Move the probe away from localized heat Check for direct sunlight Increase the lower-limit differential if appropriate

Keep all electrical connections dry. Protect the controller, plug, outlet, and connected fan plug from rain, condensation, snow, and standing water.

FAQ

Can I use this as a thermostat for an attic fan?

Yes. It is specifically designed to provide temperature control for compatible 120V plug-in attic fans that do not exceed 3A / 360W.

Can it control an attic exhaust fan or gable fan?

Yes, if the fan operates on 120V AC, has a compatible plug, remains within the 3A / 360W fan limit, and can safely restart automatically when the thermostat restores power.

At what temperature will the attic fan turn on and off?

The fan turns on when the sensed temperature rises above your selected temperature. It turns off when temperature drops below the selected setting by the configured 1–20°F / 1–10°C lower-limit value.

Does this attic fan thermostat have a timer?

Yes. The timer can be set from 0 to 10 hours. It limits the period during which thermostat-controlled operation remains active; it does not make the fan run continuously for the entire timer period.

Why does the thermostat list both 3A/360W and 10A/1200W?

The 3A / 360W rating is the limit to use for ventilation fan motor loads. The 10A / 1200W figure is the resistive-load rating. When selecting an attic, exhaust, gable, or duct fan, use the 3A / 360W limit.

Can I use it with a whole-house fan?

Only if the specific fan is a compatible 120V plug-in ventilation fan, draws no more than 3A / 360W, and can safely restart when power is switched. Many whole-house fans use higher loads or hardwired controls, so check the fan nameplate and installation requirements before ordering.

Can this thermostat control an air conditioner or refrigerator?

No. Do not use it to directly control air conditioners, refrigerators, freezers, compressors, or compressor-based cooling equipment.

How do I reset the attic fan thermostat?

The controller includes a factory-reset function in its advanced settings. Use the reset procedure in the product instructions if you need to restore the original settings.

Guides

Need to Control a Larger Fan?

If your ventilation fan exceeds this controller's 3A / 360W fan limit, do not connect it to this thermostat. Review a higher-capacity controller and confirm motor startup current, voltage, wiring, and automatic-switching compatibility first.

Read the High-Power Temperature Controller Guide →

Attic Fan Compatibility Checklist

120V AC fan 3A maximum 360W maximum Compatible plug Safe automatic restart Dry electrical location Representative probe position No compressor

Not sure whether your fan is compatible? Email yelodeer@yelodeer.com with the fan voltage, amperage, wattage, plug type, and a photo of the fan nameplate.

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Digital Attic Fan Thermostat for Exhaust Fans, 120V with Timer