Variable Speed Controller Thermatic^® Fan & EWP with 1/4" NPT Thermal Sensor (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.    

The #0555 and #0556 can be used with a combination of brushed electric fans so long as the combined current draw does not exceed 40A for each of the 2 fan channel. When using multiple fans on a single fan channel we recommend only having a maximum Combined current of 30A to 35A.

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 40A channels allow for separate control of any combination of both fan/s and/or EWP^®
• Multiple fans or pumps can be wired to a single channel, provided the combined current does not exceed 40A.
• The recommended maximum combined current draw is 30A-35A.
• 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

Rugged, reliable design

• IP67 waterproof rating ensures durability in harsh conditions

Kit Overview

This kit includes two sensors, providing flexible installation options for coolant temperature monitoring.

Sensor 1: Temperature Probe (Ambient core temperature or Coolant Fitment)

This versatile probe can detect the Ambient core temperature of the radiator core when positioned within the radiator’s fin section. Alternatively, it can be fitted directly into the coolant system using a Temperature Sensor Adaptor Kit (Part 0409 or Part 0408), available from our store.

Sensor 2: ¼ NPT Thermal Sensor Kit (Coolant or Oil Fitment)

The ¼ NPT Thermal Sensor is designed for installation directly into the fluid. The sensor can be installed into a threaded port in the thermostat housing, engine block, or directly into the radiator tank. If preferred, it can be installed into the top radiator hose using the Temperature Sensor Adaptor Kit (Part 0419 or Part 0416), the sensor can also be installed into the Transmission hose using the Transmission Temp Gauge 1/4" NPT Sensor Adapter (Part 1007), available separately from our store.

Optional Sensor: M12 x 1.5 Thermal Sensor (Coolant or Oil Fitment)

The provided sensors can be upgraded to a M12 x 1.5 Thermal sensor (Part 0462). This upgraded sensor allows you to use existing spare sensor ports in the cooling system, available separately from our store.

SPECIFICATIONS	Part #0555
Operating Voltage	12 & 24 Volt
Maximum Current	N/A
Fan Application	All Brushed DCPL Fans, EWPs
Speed	Variable Speed
Single Fan Control	Brushed FAN only
Duel Fan Control	Brushed FANs only
EWP control	Brushed EWPs only
EBP control
EWP/EBP and Fan control
Duel Fan Start-Up Delay	4 independent Operating modes
Manual Override - Turn On	2 Fan Override Wires
Manual Override - Turn off	2 Fan Override Wires
Manual Override - Voltage Selection
°C D °F Change
Temperature Setting Range	5°C To 110°C (41°F To 230°F)
Temperature Setting Method	Push Button
Coolant Temperature Detection
Air Temperature Detection
Transmission Temperature Detection
Display Type	Led Segment + Status LEDs
Temperature Display
Sensor Fault Display
Fan Operation Indicator
Over Temperature Warning
Audible alarm
Display dimmer
Mounting position	Engine bay
Mounting options	Built in Mounting holes
Accessories	Part #0578
	Part #0409
	Part #0422 (Duel Fan Only)
	Part #0465

Accessories

• Part # 0408 - Temperature Sensor Adaptor Kit - 38mm Inline Adapter
• Part # 0409 - Temperature Sensor Adaptor Kit - 35mm Inline Adapter
• Part # 0415 - Air bleed 35mm Adapter Kit
• Part # 0416 - 38mm Inline Adapter with 2 x 1/4" NPT & 1 x Bung
• Part # 0417 - Air bleed 38mm Adapter Kit
• Part # 0418 - Compression Fitting 1/4"NPT
• Part # 0419 - 35mm Inline Adapter with 2 x 1/4" NPT & 1 x Bung
• Part # 1007 - Transmission Temp Gauge 1/4" NPT Sensor Adapter 3/8"

Sensor Upgrade Kits

• Part # 0462 - M12 x 1.5 Thermal Sensor Upgrade Kit
• Part # 0465 - ¼" NPT Thermal Sensor Upgrade Kit
• Part # 0468 - 1/8" NPT Thermal Sensor Upgrade Kit

Spare Parts

• Part # 0579 - Quick Fit Kit - suit Fans Trans Coolers
• Part # 10211 - Mounting Kit - suit Thermal Sensor Probe
• Part # 10460 - Thermal Sensor Probe
• Part # 10465 - Sensor Connector for ¼ & 1/8 NPT Thermal Sensor
• Part # 18415 - Sensor Thermal - coolant temp - ¼" NPT thread

Fan & EWP^® Switch / Controller Range

Specs
	Part #0444	Part #0401	Part #0500	Part #0555	Part #0550	Part #8002
Sales Variation	#0445, #0448 #0435, #0438	#0400, #0404	#0501	#0556	#0551	#8102
Operating Voltage	12 & 24 Volt	12 & 24 Volt	12 & 24 Volt	12 & 24 Volt	12 & 24 Volt	12 & 24 Volt
Maximum Current	40 Amps	20 Amps	40 Amps	40 Amps	N/A	12 Amps EWP Only
Fan Application	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	Variable Speed	Variable Speed	Single speed Fan & Variable EWP
Single Fan Control				Brushed FAN only	Brushless FAN only
Duel Fan Control		Wiring Dependant		Brushled FANs only	Brushless FANs only	Wiring Dependant
EWP control	ON / OFF ONLY (USE 8002)	ON / OFF ONLY (USE 8002)	ON / OFF ONLY (USE 8002)	Brushed EWPs only	Brushless EWPs only
EBP control	ON / OFF ONLY	ON / OFF ONLY	ON / OFF ONLY
EWP/EBP and Fan control		Wiring Dependant				EWP and Fans only
Duel Fan Start-Up Delay	10 Seconds		Independent set Temperature	4 independent Operating modes	5 independent Operating modes
Manual Override - Turn On		use #0404	Selectable Fan Override	2 Fan Override Wires	2 Fan Override Wires
Manual Override - Turn off				2 Fan Override Wires	2 Fan Override Wires
Manual Override - Voltage Selection
°C D °F Change		No temperature units
Temperature Setting Range	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	Turn Knob	Push Button	Push Button	Push Button	Push Button
Coolant Temperature Detection	Requires #0409 or #0465		Requires #0409 or #0465
Air Temperature Detection
Transmission Temperature Detection	Ambient temperature only		Fluid measurment Requires #0465
Display Type	Led Segment		Led Segment	Led Segment + Status LEDs	Led Segment + Status LEDs	Black and white LCD
Temperature Display
Sensor Fault Display
Fan Operation Indicator						EWP and Fan
Over Temperature Warning
Audible alarm
Display dimmer
Mounting position	Engine bay	Engine bay	Vehicle Cabin	Engine bay	Engine bay	Vehicle Cabin
Mounting options	Built in Mounting holes	Bracket supplied	Universal 52mm gauge	Built in Mounting holes	Built in Mounting holes	Verious Mounting Options supplied