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Switches & Controllers Fan & EWP®

These products are ideal for enthusiasts seeking to upgrade their vehicle's cooling system, providing precise control and enhanced reliability. Whether you're looking to replace existing components or build a custom setup, Davies Craig's range offers versatile solutions to meet your needs.

Key Products:

  • EWP® / Fan Digital Controller Kit - Colour LCD (#8003):

    Upgrade your cooling system control with the latest Electric Water Pump & Fan Digital Controller Kit – Colour LCD, GEN 7. Designed for precision, reliability, and ease of use, this next-generation controller features an intuitive colour LCD interface and enhanced functionality for complete cooling management.

    Engineered to optimise electric water pump and fan performance, the 8003 delivers greater control, improved visibility, and smarter operation—ideal for performance, street, and motorsport applications. Davies Craig

  • Digital Thermatic® Fan Switch - GEN II (#0480):

    (Supersedes Part No. 0444)

    Upgrade your cooling control with the latest GEN II Digital Thermatic® Fan Switch, redesigned for improved usability, durability, and performance. Built for precision temperature management, this next-generation controller delivers smarter fan operation and enhanced installation flexibility. Larger, clearer LED display with °C / °F units & LED repositioned for better visibility. All wiring relocated to the rear for cleaner, easier installation. Davies Craig

  • Digital Thermatic® Fan Switch (#0444): Suitable for single or dual fan applications, this switch offers adjustable temperature settings and can be used with both Davies Craig and competitor fans. It supports both 12V and 24V systems, with options for different sensor types and mounting configurations. Davies Craig
  • Digital Gauge Thermatic® Fan/EWP® Switch Kit (#0500): Designed for precise control, this kit allows independent temperature settings for two fans and an EWP®. It includes a digital gauge with a temperature range from 5°C to 110°C (41°F to 230°F), and is compatible with both 12V and 24V systems. Davies Craig
  • Variable Speed Controller Brushless Thermatic® Fan & EWP® (Part #0550): High-performance Controller designed to optimise thermal management in automotive, industrial, marine and EV applications. It provides intelligent, precise control of either Brushless dual Thermatic® Electric Fans or Electric Water Pumps (EWP®), ensuring maximum, efficiency, system protection and reliable operation in the most demanding environments. Davies Craig
  • Variable Speed Controller Thermatic® Fan & EWP® (Part #0555): High-performance Controller designed to optimise thermal management in automotive, industrial, marine and EV applications. It provides intelligent, precise control of either dual Thermatic® Electric Fans or Electric Water Pumps (EWP®), ensuring maximum, efficiency, system protection and reliable operation in the most demanding environments. Davies Craig
  • Thermatic® Fan Switch Mechanical (Part #0401): The Mechanical Thermal Switch is adjustable from 40° to 100°C (104° to 212°F) suitable for 12v & 24v electrical systems. It is mounted near the radiator and the stainless steel probe fitted inside the radiator hose making contact with the coolant. The mechanical thermal switch is then connected to the  ignition circuit for operation. Davies Craig

 

These products are ideal for enthusiasts seeking to upgrade their vehicle's cooling system, providing precise control and enhanced reliability. Whether you're looking to replace existing components or build a custom setup, Davies Craig's range offers versatile solutions to meet your needs.

  Variation of #0480:

  • Digital Thermatic® Fan Switch GEN II with 1/4" NPT Thermal Sensor (Part #0481). Davies Craig
  • Digital Thermatic® Fan Switch GEN II with 1/8" NPT Thermal Sensor (Part #0482). Davies Craig
  • Digital Thermatic® Fan Switch GEN II with M12 x 1.5 Thermal Sensor (Part #0483). Davies Craig
  • Digital Thermatic® Fan Switch GEN II with 1/4" NPT Thermal Sensor & 35mm Inline Adapter (Part #0485). Davies Craig
  • Digital Thermatic® Fan Switch GEN II with 1/4" NPT Thermal Sensor & 38mm Inline Adapter (Part #0488). Davies Craig

 Variation of #0444:

  • Digital Thermatic® Fan Switch with 1/4" NPT Thermal Sensor Kit (Part #0445). Davies Craig
  • Digital Thermatic® Fan Switch with 1/4" NPT Thermal Sensor Kit (Part #0448). Davies Craig
  • Digital Thermatic® Fan Switch with 1/4" NPT Thermal Sensor & 35mm Inline Adapter Kit (Part #0435). Davies Craig
  • Digital Thermatic® Fan Switch with 1/4" NPT Thermal Sensor & 38mm Inline Adapter Kit (Part #0438). Davies Craig

Variation of #0401:

  • Thermatic® Fan Switch Mechanical Combo (Part #0400). Davies Craig
  • Thermatic® Fan Switch Mechanical with Relay (Part #0404). Davies Craig

Thermatic® Fan & EWP® Switch / Controller Range

Specs
Part #0480 Part #0444 Part #0401 Part #0500 Part #0555 Part #0550 Part #8003
Supersedes Part No.

#0444,

#0445, #0448

#0435, #0438

N/A

 N/A N/A N/A N/A #8002, #8102
Sales Variation

#0481, #0482, #0483, #0485, #0488

#0445, #0448

#0435, #0438

 #0400, #0404 #0501 #0556 #0551 #8103
Operating Voltage 12 & 24 Volt 12 & 24 Volt 12 & 24 Volt 12 & 24 Volt 12 & 24 Volt 12 & 24 Volt 12 & 24 Volt
Maximum Current 40 Amps  40 Amps  20 Amps 40 Amps  40 Amps  N/A 12 Amps EWP Only
Fan Application MAX 30A Each  MAX 30A Each  Relay Switching Current MAX 15A All DCPL Fans, EWPs & EBPs All brushed DCPL Fans, EWPs  All Brushless DCPL Fans, EWPs  All DCPL Fans, EWPs 
Speed Single Speed Single Speed Single Speed Single Speed Variable Speed  Variable Speed  Single speed Fan & Variable EWP  
Single Fan Control null null null Brushed FAN only Brushless FAN only null
Duel Fan Control null  Wiring Dependant null Brushled FANs only Brushless FANs only
EWP control ON / OFF ONLY (USE 8003) ON / OFF ONLY (USE 8003) ON / OFF ONLY (USE 8003) ON / OFF ONLY (USE 8003) Brushed EWPs only Brushless EWPs only null
EBP control ON / OFF ONLY  ON / OFF ONLY  ON / OFF ONLY  ON / OFF ONLY  null null null
EWP/EBP and Fan control null  Wiring Dependant null null null EWP and Fans only
Duel Fan Start-Up Delay 5 Seconds 10 Seconds null Independent set Temperature 4 independent Operating modes  5 independent Operating modes  Independent set Temperature
Manual Override - Turn On 2 Fan Override Wires null use #0404 Selectable Fan Override 2 Fan Override Wires 2 Fan Override Wires 2 Fan + 1 EWP Override Wire
Manual Override - Turn off null null null 2 Fan Override Wires 2 Fan Override Wires null
Manual Override - Voltage Selection null null null null null null
°C  to °F Change null No temperature units null null null null
Temperature Setting Range

5°C To 110°C

(41°F To 230°F)

40°C To 110°C

(104°F To 230°F)

40°C To 100°C

(104°F To 212°F)

5°C To 110°C

(41°F To 230°F)

5°C To 110°C

(41°F To 230°F)

5°C To 110°C

(41°F To 230°F)

40°C To 110°C

(104°F To 230°F)
Temperature Setting Method Push Button Push Button Turn Knob Push Button Push Button Push Button Push Button
Coolant Temperature Detection Requires #0409 or #0465 Requires #0409 or #0465 null Requires #0409 or #0465 null null null
Air Temperature Detection null null null null null null
Transmission Temperature Detection Fluid measurment Requires #0465 Ambient temperature only null Fluid measurment Requires #0465 null null null
Display Type Led Segment  Led Segment  null Led Segment  Led Segment + Status LEDs Led Segment + Status LEDs Colour LCD
Temperature Display null null null null null null
Sensor Fault Display null null null null null null
Fan Operation Indicator null null null null null EWP and Fan1 and FAN2
Over Temperature Warning null null null null null null
Audible alarm null null null null null null
Display dimmer null null null null null
 Mounting position Engine bay Engine bay Engine bay Vehicle Cabin  Engine bay Engine bay Vehicle Cabin
 Mounting options Built in Mounting holes Built in Mounting holes Bracket supplied Universal 52mm gauge Built in Mounting holes Built in Mounting holes Verious Mounting Options supplied

 

Digital Thermatic® Fan Switch GENII (Part #0480)

Variation:

  • Part #0481 - Digital Thermatic® Fan Switch GEN II with 1/4" NPT Thermal Sensor
  • Part #0482 - Digital Thermatic® Fan Switch GEN II with 1/8" NPT Thermal Sensor
  • Part #0483 - Digital Thermatic® Fan Switch GEN II with M12 x 1.5 Thermal Sensor
  • Part #0485 - Digital Thermatic® Fan Switch GEN II with 1/4" NPT Thermal Sensor & 35mm Inline Adapter
  • Part #0488 - Digital Thermatic® Fan Switch GEN II with 1/4" NPT Thermal Sensor & 38mm Inline Adapter

Upgrade your cooling control with the latest GEN II Digital Thermatic® Fan Switch, redesigned for improved usability, durability, and performance. Built for precision temperature management, this next-generation controller delivers smarter fan operation and enhanced installation flexibility.

What’s New vs Part No. 0444

  • Improved Display & Layout
    • Larger, clearer LED display with °C / °F units
    • LED repositioned for better visibility
    • All wiring relocated to the rear for cleaner, easier installation
  • Faster Dual Fan Operation
    • Second fan start-up delay reduced to 5 seconds for improved cooling response
  • Advanced Override Control
    • Dual manual override wires for independent fan control
    • Selectable override signal polarity (positive or negative)
  • Enhanced Durability
    • Upgraded to IP67 rating for superior water and dust protection
  • Expanded Temperature Range
    • Adjustable from 5°C to 110°C (41°F to 230°F)

Digital Thermatic® Fan Switch (Part #0444)

Variation:

  • Part #0445 - Digital Thermatic® Fan Switch with 1/4" NPT Thermal Sensor Kit
  • Part #0448 - Digital Thermatic® Fan Switch with 1/8" NPT Thermal Sensor Kit
  • Part #0435 - Digital Thermatic® Fan Switch with 1/4" NPT Sensor & 35mm Inline Adapter Kit
  • Part #0438 - Digital Thermatic® Fan Switch with 1/4" NPT Sensor & 38mm Inline Adapter Kit

Davies, Craig Pty Ltd very own designed Digital Thermatic Fan Switch Kit can be used with our Thermatic Fans, EWP®'s & competitors Fans. It senses air temperature as it passes through the radiator or can be placed directly into coolant and has an adjustable temperature range of 40ºC to 110ºC (104ºF to 230ºF).

  • This switch is operated thermally & also when the air conditioning is in operation.
  • Simply set the temperature by pressing the set button.
  • It can run 1 or two fans. The second fan (if applicable) will start 10 seconds after Fan #1 runs.
  • To convert temperature reading from Centigrade to Fahrenheit, remove the Jumper Pin on the unit next to the LED screen.
  • IP66 Rated

   

EWP® & Fan Digital Controller - Colour LCD (PART #8003)

Variation:

  • Part #8103 - EWP & Dual Fan Digital Controller - Colour LCD (Module)

(PATENTS: USA 6425353, EU 1133624, AUS 756453)

Upgrade your cooling system control with the latest Electric Water Pump & Fan Digital Controller Kit – Colour LCD, Gen 7. Designed for precision, reliability, and ease of use, this next-generation controller features an intuitive colour LCD interface and enhanced functionality for complete cooling management.

Engineered to optimise electric water pump and fan performance, the 8003 delivers greater control, improved visibility, and smarter operation—ideal for performance, street, and motorsport applications.

Key Features

  • Colour LCD Display
    High-visibility screen with clear system status, temperature readings, and intuitive setup.
  • Dual Fan Start-Up Control
    Independently set activation temperatures for Fan 1 and Fan 2, allowing staged cooling and reduced electrical load spikes.
  • Manual Override Function
    Dedicated override capability for 2 fans and 1 electric water pump, enabling continuous operation when required (e.g. A/C integration or manual control).
  • Real-Time Operation Indicators
    Display shows live status of:
    • Electric Water Pump (EWP®)
    • Fan 1
    • Fan 2
  • Adjustable Display Brightness
    Multiple dimming levels for optimal visibility in both day and night driving conditions.
  • Programmable Temperature Control
    • Adjustable pump target temperature
    • Independent fan activation and deactivation settings
    • Shutdown temperature control
    • Temperature offset calibration (+/- 5°C)
  • Audible Alarm & Warning System
    Alerts for high temperature, voltage irregularities, and system faults.

How It Works

The controller automatically regulates pump speed and fan operation based on coolant temperature, ensuring efficient thermal management.

  • Pump operation adjusts dynamically for optimal cooling
  • Fans activate progressively based on user-defined temperature thresholds
  • After shutdown, the system continues to cool for up to 3 minutes if required 

 Variable Speed Controller

(Brushless and Brushed Motors)

High-performance Controller designed to optimise thermal management in automotive, industrial, marine and EV applications. It provides intelligent, precise control of either dual Thermatic® Electric Fans or Electric Water Pumps (EWP®), ensuring maximum, efficiency, system protection and reliable operation in the most demanding environments.    

Key Features

Flexible operating modes

  • Four distinct control strategies to suit differing cooling system applications
  • 12 & 24 Volt Applicable

Independent dual outputs

  • Two fully isolated PWM signal channels allow for separate control of any combination of Brushless fan/s and/or Brushless EWP®
  • Multiple Brushless fans or pumps can be wired to a single channel, provided the combined PWM signal current does not exceed .5A.
  • Unique setpoints, and operating modes can be applied to each output independently.

Shutdown control

  • After ignition-off, the Controller will keep fans running for user-defined time or until defined shutdown time is reached to prevent heat-soak.

Manual overrides

  • Dedicated ON/OFF control per channel by passes automatic control if required
  • Configurable polarity accommodates different wiring and switch arrangements

Safety & failsafe options

  • In the event of Sensor fault, outputs default to full speed to protect the system

Advanced Configuration options

  • Temperature difference – defines ramping start relative to base set point
  • Defines the speed at which the fan will start
  • Shutdown time & temperature – controls post-ignition cooldown time & temperature
  • Temperature offset – Adjusts for Sensor calibration
  • Factory Reset – restores all parameters to default settings
  • Adjustable PWM frequency – adjusts PWM output frequency to suit controlled Fan and/or EWP on the Brushless Variable Speed Controller

Rugged, reliable design

  • IP67 waterproof rating ensures durability in harsh conditions

THERMAL SWITCHES

A Thermal Switch is a device which senses the temperature of the coolant and turns on the electric fan when cooling is needed over a wide range of temperatures. Davies Craig offers two types of switches, a mechanical & electronic version.

 

MECHANICAL THERMAL SWITCH (PART #0400, 0401 & 0404) 

The Mechanical Thermal Switch is adjustable from 40° to 100°C (104° to 212°F) suitable for 12v & 24v electrical systems. It is mounted near the radiator and the stainless steel probe fitted inside the radiator hose making contact with the coolant. The mechanical thermal switch is then connected to the  ignition circuit for operation. The thermal switch & relay kit (Part 0404) enables a fan to operate both thermally and also when the air conditioning is running.

  

 

DIGITAL GAUGE THERMATIC® FAN / EWP® SWITCH KIT

PART #0500 (12 & 24 Volt)

A bright, attractive, compact high visibility 52mm round gauge with LED digital display for mounting in the driver’s compartment!

Automatically activates single or twin fans or a fan and Electric Water Pump at your set / targeted temperature when extra cooling is required. It can also detect transmission fluid temperature.

It senses air temperature as it passes through the radiator with the sensor placed in the radiator fin section or alternatively the sensor can also be placed directly into the coolant system in combination with a Temperature Sensor Adaptor Kit (Part 0409).

The kit is sold in 12 Volt configuration.

*For 24 Volt application: 2 x 24V Relays required, sold separately (Part #10534)

  • Independent set temperature for Fan 1 and Fan 2
  • Universal 52mm gauge design.
  • Extra-long temperature sensor wires 380 cm
  • Can detect ambient temperature (air) as standard
  • Can detect coolant temperature
    • Use #0465 for OE style 1/4 “NPT port install
    • Use #0409 for radiator hose install

TEMPREATURE SENSOR INLINE ADAPTER KIT (PART #0409)

Now there is no need to squeeze the probe of the Mechanical Thermal Switch or EWP® Controller between the radiator inlet and radiator hose. This simple and economical Adaptor Kit allows easy fitting directly into the radiator hose. Just fit probe into compression fitting, remove about 17mm of radiator hose, fit adaptor between each end of hose, secure hose clamps and the job is done. The kit comes with everything you need for a watertight and effective installation. We even supply rubber sleeves to enable fitment to radiator hose sizes from 32 to 40 mm diameter.

ADAPTER INLINE 38mm (2 x 1/4" NPT) Kit (PART #0409)

LOW COOLANT LEVEL ALARM KIT (PART #1035)

The Low Coolant Level Alarm Kit will monitor the coolant level in engines and will immediately identify low coolant should this situation develop. This cool new device comes with a loud audible alarm and will help prevent an over-heating engine and significant engine failure. The unit simply fits into your engine’s top radiator hose and will alert you to the loss of engine system coolant via an audible alarm. This situation may occur when a radiator hose splits or frays, a radiator springs a leak and the engine’s coolant is either low or lost. The vehicle’s simple temperature gauge will not alert the driver to this event and the Low Level Coolant Alarm adds security to assist monitor your engine’s coolant level. Loss of engine coolant can cause the water pump to lose pressure and will quickly develop into to an overheated engine. Most engine temperature protection systems and gauges will not detect coolant loss as they rely on sensing the coolant temperature. When the coolant is lost, the gauges cannot sense engine temperature and as such expensive engine failure may occur.