Variable Speed Controller Thermatic® Fan & EWP with 1/8" NPT Thermal Sensor (Part #0556)
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 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: ⅛ NPT Thermal Sensor Kit (Coolant or Oil Fitment)
The ⅛ 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) requires Sensor Port Adapter - 1/4" NPT Male to 1/8" NPT Female (Part 0412), the sensor can also be installed into the Transmission hose using the Transmission Temp Gauge 1/4" NPT Sensor Adapter (Part 1007) requires Part 0412 , 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.
KIT CONTENTS | |
DESCRIPTION | UNITS |
| Variable speed fan controller | 1 |
| Mounting Kit - suit Thermal Sensor Probe | 1 |
| Thermal Sensor Probe | 1 |
| Sensor Thermal - coolant temp - ⅛" NPT thread | 1 |
| Yellow - 6mm Ring Terminal | 2 |
| Yellow - Wire Joiner | 4 |
| RED - 3.5mm Fork Crimp Terminal | 4 |
| Instructions | 1 |
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
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 # 18418 - Sensor Thermal - coolant temp - ⅛" 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 |