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I live in the Colorado Rockies where it's certainly not hot - the fans rarely come on - and I drive <5,000 miles/year, but I got only about two years service out of the previous Derale 16789 before relay #1 got sticky and the fan would stay on until I rapped the controller with a small hammer. The innards of the controller are potted so there's no way short of cutting the cover off of the relay to get at the contact to burnish them. After a few years of lifting the hood every time the relay hung, I'm replacing the unit with the same part but installing external relays so that the fan current never passes through the controller -- I'd rather replace a five dollar relay than a $130 controller. I'm replacing the thing with the same part because it's what fits my setup; otherwise I'd select a different product.Read full review
Verified purchase: Yes | Condition: New
I needed a true fan controller and was delighted to see that a reputable company Was baking one that looked great. Upon receiving the controller I installed it following instructions exactly and was pleased to see it worked great for about a week. My engine ran hot and upon inspection discovered the fans were not coming on. I bypassed the controller using the manufactures instructions and both fans ran for about two weeks then quit. The unit is now completely dead and I have asked for a refund.I am sadly disappointed that’s such a simple item could’ve cost me my engine because it was nothing but junk.There are literally hundreds of reviews on this exact same controller with the same or worse performance. Steer clear save your engine buy something else.
Verified purchase: Yes | Condition: New
So far so good it does what they say it will do easy to set up as long as it lasts i ll be happy
Verified purchase: Yes | Condition: New
I haven’t tried it yet seams like JEGS FORGET YO SEND MY FAN
Verified purchase: Yes | Condition: New
The Derale electric fan controller works great .Top quality
Verified purchase: Yes | Condition: New
Verified purchase: Yes | Condition: New
Works great, and looks good
Verified purchase: Yes | Condition: New
Simple compact clean appearing
Verified purchase: Yes | Condition: New
The unite worked as advertised dual fan on a 476 bbc it keep my temps down enough only one fan has ran to date with another fan as reserved for the nasty days of florida 98 degrees and 100% humidity works great
Verified purchase: Yes | Condition: New
Couldn't install temp probe.
Verified purchase: Yes | Condition: New
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