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In-Store Pickup Location

Flex-A-Lite Variable Speed Controllers 31165

Fan Control, Thermostatic, Adjustable, 160 to 220 Degrees, Kit

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  • Order this item and get free delivery and handling on your entire order! Offer excludes truck freight and oversize fees. Valid on orders shipped in the contiguous United States.

Brand: Flex-a-lite

Manufacturer's Part Number: 31165

Part Type: Fan Switches, Thermal

Product Line: Flex-A-Lite Variable Speed Controllers

Summit Racing Part Number: FLX-31165

UPC: 088657311656

Thermal Switch Style: Adjustable fan control kit

Sending Unit Style: Radiator probe

Sending Unit Included: Yes

Fan Quantity: Single/Dual

Adjustment Range (F): 160-220 degrees F

Relay Included: No

Wiring Harness Included: Yes

Manual Override Switch Included: No

Air Conditioning Relay Included: No

Quantity: Sold as a kit.

Notes: Variable speed control allows fan speed from 60 to 100 percent, depending on built-in thermostat setting. Rated at 45 amps.

In-Store Pickup: Choose In-store pick-up (OH, NV, GA, TX) on our web site.

Flex-A-Lite variable speed controllers attach on or near the electric fan, sensing coolant temperature via a radiator probe or temperature sending unit. They set fan speed from 60 to 100 percent, depending on the built-in thermostat's setting. The thermostats have a range of 160-220 degrees F. The variable speed controllers allow greater control over engine temperature, which helps to reduce charging spikes and current load on the charging system. They will keep the fans running for 30 seconds after your vehicle is turned off.

Warranty

Questions & Answers Ask a Product Question
Q:

I have a dual fan set up, each fan is rated at a 18.7 amp draw equaling 37.4 amps for both, will this controller be able to power both fans without overheating? I know the description says rated at 45 amps but I need to be sure.

Asked by RYAN on March 18, 2019

A:

Yes, I have used 4 in the past on lightning's. Expensive but, worth it

HUNTER from GA answered on April 04, 2019

+See All Answers (2) Answer This Question

Q:

Does this controller require any relays or other parts to install with a flex a lite syclone s-blade #398?

Asked by ROBERT on March 21, 2019

A:

No everything is included with the fan controller

EDDIE from FL answered on March 31, 2019

Answer This Question

Q:

Does this require any relays or other additional parts? Installing with a flex a lite s-blade #398

Asked by ROBERT on March 22, 2019

A:

No. Flex-a-lite includes everything you need in the kit. It's well worth the cost.

LARRY from CA answered on April 01, 2019

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Q:

Will this work with a Flex-A-Lite Black Magic Xtreme Series Electric Fans 180 fan?

Asked by CHRIS on February 04, 2019

A:

Thank you for your question. The Flex-a-lite 31165 variable speed controller is compatible with the part number 180 cooling fan.

Summit RacingSummit Racing Answer - March 04, 2019

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Most Helpful Reviews Review This Product

22 Customer Reviews for Flex-a-lite 31165 - Flex-A-Lite Variable Speed Controllers

Average Customer Review

5 Star

(19)

4 Star

(3)

3 Star

(0)

2 Star

(0)

1 Star

(0)

+See All 22 Reviews

Flex-a-lite 31165 Variable Speed Controler

Summit RacingSummit Racing Verified Purchase

FLX-31165
Clear instructions and an easy enough installation. I've only had the fan control a month but it works as it should. I'm convinced that you get what you pay for because of troubles I had with less expensive units failing for no apparent reasons.The control has LED lights for different operations which I feel are very helpful to verify control functions. ...read more

1 of 1 found this review helpful.

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Reviewer: from MA

Date: April 12, 2016

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Price/Value
Quality

Works well

Summit RacingSummit Racing Verified Purchase

FLX-31165
Used this unit to replace one from another vendor that failed. Installation was straight forward, parts are good quality, only minor adjustment to set temp. With the 60% power at the set point and when the A/C override is engaged my dual fans are much quieter. It's not as good looking as some other brands, but it's small enough to be tucked away. Status lights are a good features, takes away the mystery. On the down side, the wrong instructions were in the box, but the correct instructions are on-line, so not a big deal. ...read more

1 of 1 found this review helpful.

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Reviewer: from CA

Date: March 11, 2016

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upgraded fan control

Summit RacingSummit Racing Verified Purchase

FLX-31165
A good controller for my 1999 honda crv as i had an abnormal temperature guage reading getting close to hot it didn't boil over as im running both a Mishimoto radiator and fan assembly it was triggered by the stock fan switch control. it was not reliable i was going to go with a Mishimoto control but this Flex A lite 31165 is way better its variable speed meaning it will ramp the fan speed up and down according to temperature. i mounted it to the driver's side close to the firewall near the vacuum booster so its away from the heat as mainly on these Honda B series engines the exhaust is close to it. then what Flex a Lite its mounted on their radiator fan assemblies i had to add wiring to both fan motors and the temperature probe i used 14 guage wire for the fan motors. the Ac wire i used the stock condenser fan connector with a spade terminal. as in operation its normal for it to make a humming noise as the fans come up to speed at 60 percent. when its hot it will run the fans after the engine is turned off. whats neat about this you can get the optional switch from Flex A lite to allow you to override the fans to run them at 100 percent or to turn them off in certian conditions or going through a drive thru to place an order. as the Mishimoto one i saw doesn't have that. I would recommend this on most FWD and AWD or RWD vehicles with stock electric fans but check your manual first you may have to use an LED load equalizer on the factory fan connector when u disconnect the stock fan as you may get a cooling fan trouble code. i would recommend this on all Honda and Acura vehicles built through 2006 or for older Civics and integras with a Honda B or K series engine swaps. As im hoping ill get many years of service out of this quality Flex a Lite product. ...read more

1 of 2 found this review helpful.

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Reviewer: from PA

Date: December 16, 2015

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Flex-a-lite dual fan speed controller

Summit RacingSummit Racing Verified Purchase

FLX-31165
have had this product installed for 8 or 9 years and it is very reliable and cools my engine when nothing else would(when climbing hills). Temp sensor as finally failed after all these years. Your money is well spent on this product!!!

0 of 0 found this review helpful.

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Reviewer: from CA

Date: January 17, 2019

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controller review

Summit RacingSummit Racing Verified Purchase

FLX-31165
works great, setting the thermostat takes a few adjustments to get it right where you want it. setting up at home vs driving conditions.

0 of 0 found this review helpful.

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Reviewer: from Canada

Date: August 09, 2018

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Some parts are not legal for use in California or other states with similar laws / regulations

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