Sale

Heating and Cooling› Fans

Derale

Dual Fan Controller Thread In

$316.84 $210.20 Save $106.64

SKU: D00Y 16789

In Stock
In Stock
Ships by Oct 9
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

It features a thermostatic adjustment range from 160 to 240 degrees Fahrenheit and includes a thread-in sending unit and relay.

This controller is built with a finned, die-cast aluminum housing and an automatic resetting circuit breaker. It also comes with a built-in air conditioning override circuit, wiring, mounting hardware, and instructions. Each fan can draw a maximum of 35 continuous amps.
Show original supplier description

Part #: 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 degrees-240 degreesF, 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 degreesF warmer. Each electric fan will turn off at 10 degreesF below its turn-on temperature. Kit comes complete with wiring harness, fusible link, all necessary electrical connectors and 3/8" NPT thread-in probe.

Features:

  • High Amperage Adjustable Dual Electric Fan Controller, 3/8" NPT Thread In Probe

Fan Controller - High Amperage Dual Fan - Adjustable - 150-240 Degree F Activation Range - 3/8 in NPT Temperature Sensor - 35 amp - Kit

Vehicle Symptoms
  • electric cooling fans not turning on as engine warms up
  • engine overheating in traffic but fine at highway speed
  • engine temperature climbs with AC running at idle
  • fan cycles constantly even after engine is cool
  • cooling fans only run at full speed or not at all
Diagnostic Codes
  • P0480 – Cooling Fan 1 Ctrl Ckt
  • P0481 – Cooling Fan 2 Ctrl Ckt
  • P1141 – Fan Ctrl Ckt Malf
  • P1480 – Fan Relay (Low) Ckt Malf
  • P1481 – Fan Relay (High) Ckt Malf
Relevant Conversations
  • electric fan not coming on engine overheating in traffic
  • Derale 16789 dual fan controller wiring diagram
  • P0480 cooling fan 1 control circuit how to fix
  • best adjustable thermostatic fan controller for dual electric fans
  • Derale 16789 vs Flex-a-lite 31147 fan controller
  • how to set fan turn-on temperature on Derale controller
  • fan controller with AC override relay install classic car
  • engine overheat after electric fan conversion not enough airflow
  • Derale high amp fan controller 35 amp per fan review
  • dual electric fan wiring harness relay temperature probe

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandDerale
Part NumberD00Y 16789

About MOTORMIA

5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy