Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.
Desertcart purchases this item on your behalf and handles shipping, customs, and support to Colombia.
🌬️ Keep your engine cool, your ride smarter — don’t get left in the heat!
The Flex-A-Lite 31163 Variable Speed Controller is a high-performance automotive fan controller designed for dual-fan systems. Featuring an adjustable activation temperature between 160-240°F, a built-in 45-amp relay, and a thread-in temperature sensor with versatile adapters, it optimizes cooling by starting fans at 60% power and scaling up as needed. It also runs fans for 25 seconds after engine shutdown to prevent overheating. This all-in-one kit includes wiring, fuse, and terminals, ensuring easy installation and reliable operation backed by a 1-year warranty.
| Manufacturer | Flex-A-Lite |
| Brand | Flex-a-lite |
| Model | 31163 |
| Item model number | 31163 |
| Exterior | Machined |
| Manufacturer part number | 31163 |
| OEM Part Number | N |
| Special Features | Manual |
| Item Weight | 454 g |
A**R
Works very well
Installation was straight forward and is easy to setup. The electric fans on my mustang now start much less quieter and so far have only needed the low speed to keep the car cool, will see what happens in the summer.
W**M
funktioniert sehr gut
Gute justierung.
D**T
Perfect
This item works perfectly. Much better than the probe in the rad fins unit.
J**B
Well designed works great - The kit has everything needed to install. Tech. support awesome!
I installed an older version of this in my car over 10 years ago. It was still working fine, but I didn't want to risk overheating, so I replaced it. Since I bought my first one the controller has been redesigned and is much improved. (Not that it was crappy before ;-) The fan speed ramps up and down over about a 10 degree range which is nice. It has a "soft" start so as to be easier on the charging system. Very important to me living in the south: It has a controller lead that can be wired to your AC compressor so that the fan comes on when the AC is running. This provides MUCH improved AC performance compared to my OEM fluid fan clutch. This feature alone made it worth installing for me! Tech. Support is available. It is speedy and knowledgeable. I spoke with AJ about some details of installing this on my "vintage" 1986 vehicle, and he was incredible helpful! All the parts that you will need are included in the kit, and he fuse block included is the most robust I have ever seen! I've had trouble in the past with the crappy fuse holders from the mass-market parts stores... I expect no trouble from this one!
D**T
Easy to install
Great purchase..
J**M
High quality
Excellent fan controller assembly. instructions are clear and easy to follow. The hardest part was finding the space to mount it in my 1966 Mustang engine bay.
Trustpilot
3 days ago
2 weeks ago