Derale High AMP Adjustable Dual Electric Fan Controller Thread-In Probe 16789

Designed with quality and performance in mind, this High Amperage Dual Fan Controller breaks new ground in the industry of electric fan controllers. 100% USA made, a bulletproof design, 35 amp per fan amperage rating, adjustability from 150°-240°F, and a die cast bright finish aluminum cap, come together to make this dual fan controller stand out from the crowd. It's capable of controlling two separate 35 amp fans at different turn-on temperatures, with only a single probe. The first electric fan will be activated at the temperature set by the user followed by the second electric fan when the temperature becomes 10°F warmer. Each electric fan will turn off at 10°F below its turn-on temperature. Kit comes complete with wiring harness, fusible link, all necessary electrical connectors and 3/8" NPT thread-in probe.

Specifications

• Amp Rating: 35 amp per fan
• Width: 2-3/8"
• Length: 4-5/8"
• Height: 1-9/16"

Features

• Adjustable turn-on temperature from 150-240°F
• Rated at a maximum 35 amps per fan
• Activates fan #1 at adjusted temperature
• Activates fan #2 at 10°F warmer than fan #1
• Turn-off temperatures are preset at 10°F below turn-on temperatures
• Die cast aluminum housing
• AC override circuit included
• Thread-in 3/8" NPT probe

• Application: This controller suits builds running two separate electric fans that need staged activation from a single probe, commonly used on high performance or heavy load applications where one fan alone can't keep up and a second fan should only kick in once temperature climbs further.

• Size/Spec Context: Rated at 35 amps per fan, well above the 25 amp single stage and 15-16 amp thermostat units elsewhere in the range, this suits larger high-draw fans rather than smaller factory-style units. Compact housing at 4-5/8 inches length keeps mounting straightforward despite the higher amp rating.

• Construction Note: 100% USA made with a die cast bright finish aluminium housing for durability, using a single 3/8 inch NPT thread-in probe to control both fans rather than requiring two separate sensors.

• Fitment Note: Fan #1 activates at your chosen temperature (adjustable 150-240°F) and fan #2 activates 10°F warmer than fan #1, with each fan turning off 10°F below its own turn-on point. Confirm your engine has a suitable 3/8 inch NPT boss for the thread-in probe before ordering, and that both fans are rated within the 35 amp per fan limit.

• What to Pair With: Commonly paired with two separate electric fans wired individually to the controller's two outputs, taking advantage of the staged activation rather than running both fans simultaneously off one trigger point.

• Practical Buyer Tip: Because fan #2 only activates 10°F above fan #1's setting, choose your fan #1 turn-on temperature with enough margin so the second fan has a genuine chance to engage before the engine reaches its overheating threshold.