---
product_id: 3322583
title: "3652 Universal Add-On Preset Thermostatic Fan Control – NOT For Computer (ECM) Controlled Fan Systems"
brand: "hayden automotive"
price: "R1496"
currency: ZAR
in_stock: true
reviews_count: 8
category: "Hayden Automotive"
url: https://www.desertcart.co.za/products/3322583-3652-universal-add-on-preset-thermostatic-fan-control-not-computer
store_origin: ZA
region: South Africa
---

# 12V universal power 185°F preset temp Probe fits radiator fins 3652 Universal Add-On Preset Thermostatic Fan Control – NOT For Computer (ECM) Controlled Fan Systems

**Brand:** hayden automotive
**Price:** R1496
**Availability:** ✅ In Stock

## Summary

> 🌬️ Keep your engine cool and your ride cooler — no sweat, just smart fan control!

## Quick Answers

- **What is this?** 3652 Universal Add-On Preset Thermostatic Fan Control – NOT For Computer (ECM) Controlled Fan Systems by hayden automotive
- **How much does it cost?** R1496 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/3322583-3652-universal-add-on-preset-thermostatic-fan-control-not-computer)

## Best For

- hayden automotive enthusiasts

## Why This Product

- Trusted hayden automotive brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Universal Compatibility:** Works seamlessly with Hayden and OEM electric fans for hassle-free upgrades.
- • **Durable & Low Noise Operation:** Machined plastic housing with whisper-quiet 14 dB noise level for professional-grade performance.
- • **Precision Temperature Control:** Preset at 185°F for reliable fan activation without guesswork.
- • **Dual Fan & Manual Override Ready:** Supports wiring for two fans plus an override switch for ultimate control.
- • **Easy Radiator Probe Installation:** Probe designed to fit snugly into radiator fins ensuring accurate temp sensing.

## Overview

The Hayden Automotive 3652 is a preset 185°F thermostatic fan controller designed for universal use with electric fans, excluding ECM-controlled systems. Featuring a radiator fin probe for precise temperature sensing, it supports dual fan wiring and manual override, operates quietly at 14 dB, and runs on standard 12V power. Ideal for professionals seeking reliable, maintenance-free cooling upgrades that keep engines running optimally under all conditions.

## Description

This is a 185 degree Fahrenheit preset thermostatic fan control. It is compatible with both Hayden and original equipment fans.

Review: Simple setup that works - **Update after 1 day** After driving at highway speeds then coming to a long red light, the fan doesn’t kick on until above 200 now. Sometimes 201, sometimes 207. The probe in the radiator just isn’t the most accurate. It’s not the probe, but how it relies on contact with the radiator. Hopefully it works in summer heat or I’ll be replacing the probe with an adjustable switch. I’ve seen temps as high as 220 with my stock clutch fan in Florida heat, so as long as it keeps to this range, I guess I’m fine. Used this to replace my mechanical fan. The thermostat in my truck is rated for 195. It’s a backward design with the thermostat in the lower (cool side) radiator hose. I placed the probe ~3” below the upper hose as described in the directions. Even though the switch is preset to 185, my fan actually kicked on at 195 according to my OBD2 scanner. That worked out perfectly. The temp raised to 197 briefly, then dropped down to 192 which is when the fan kicked back off. Hopefully it doesn’t short cycle a lot, but I imagine in summer heat, it’ll be running nonstop regardless in combination with the AC on. I spliced into the 12v wire on my AC clutch and it kicks the fan on when the AC compressor is engaged. The included diode in the green wire is a nice feature. The only complaint I have is the crappy self tapping screw. I drilled out a hole 3/4 the diameter of the screw and it still wouldn’t bite. I end up just bolting the relay to the hole I drilled.
Review: Read the pitfalls of this before you buy - I can’t fault the seller for this product because this was something that was outside of their control. However I had a pretty bad misfortune my relays and my fuses melting out. Now mind you, it is a 12V system And yes mechanical parts break all the time. (Yes I’m still returning this) After wiring this up and running dual fans (10” and 12”) I noticed the fans stopped working. I checked the solder joints and continuity to the fan motors, no issues. (And yes I had the orientation of the props spinning correctly) The instructions say to hook up the green or trigger wire to the AC compressor, however I’ve come to terms that this might not be good, simply because if your AC compressor is kicking on and off at specific temperatures in frequently, it’s ultimately surging the relay. Honestly the more better way is to put a dedicated toggle switch. (And yes I also replaced most of the AC system) Simple bad luck. To those who left bad/negative reviews. This trigger wire might be the reason

## Features

- 185 degree Fahrenheit preset thermostatic fan control
- For use with Rapid-Cool and super duty electric fans
- Probe installs in to radiator fins
- Package Dimensions : 8.5" L x 9.88" W x 9" H

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000C3DD7M |
| Best Sellers Rank | #820,722 in Automotive ( See Top 100 in Automotive ) #224 in Automotive Replacement Engine Fan Electric Controls |
| Brand | Hayden Automotive |
| Brand Name | Hayden Automotive |
| Compatible Devices | Automotive Engine |
| Cooling Method | temperature-based |
| Customer Reviews | 4.2 out of 5 stars 883 Reviews |
| Global Trade Identification Number | 00036752036523 |
| Included Components | Wiring Harness |
| Item Dimensions L x W x H | 7.9"L x 4.5"W x 2.4"H |
| Item Type Name | Fan Control |
| Item Weight | 0.4 Pounds |
| Manufacturer | Hayden Automotive |
| Material Type | Plastic |
| Model | 3652 |
| Noise Level | 14 Decibels |
| Number of Items | 1 |
| Part Number | 3652 |
| Power Connector Type | [UN] Universal Connector (possibly requiring an adapter) |
| Product Dimensions | 7.9"L x 4.5"W x 2.4"H |
| UPC | 036752036523 |
| Unit Count | 1.0 Count |
| Voltage | 12 Volts |
| Warranty Description | 1 year or 12K Miles |

## Product Details

- **Brand:** Hayden Automotive
- **Compatible Devices:** Automotive Engine
- **Cooling Method:** temperature-based
- **Global Trade Identification Number:** 00036752036523
- **Material:** Plastic
- **Noise Level:** 14 Decibels
- **Power Connector Type:** [UN] Universal Connector (possibly requiring an adapter)
- **Product Dimensions:** 7.9"L x 4.5"W x 2.4"H
- **UPC:** 036752036523
- **Voltage:** 12 Volts

## Images

![3652 Universal Add-On Preset Thermostatic Fan Control – NOT For Computer (ECM) Controlled Fan Systems - Image 1](https://m.media-amazon.com/images/I/81ayR9bRO7L.jpg)
![3652 Universal Add-On Preset Thermostatic Fan Control – NOT For Computer (ECM) Controlled Fan Systems - Image 2](https://m.media-amazon.com/images/I/71PoKeCh53L.jpg)
![3652 Universal Add-On Preset Thermostatic Fan Control – NOT For Computer (ECM) Controlled Fan Systems - Image 3](https://m.media-amazon.com/images/I/61HI6oHYjoL.jpg)
![3652 Universal Add-On Preset Thermostatic Fan Control – NOT For Computer (ECM) Controlled Fan Systems - Image 4](https://m.media-amazon.com/images/I/718ShQJZJPL.jpg)
![3652 Universal Add-On Preset Thermostatic Fan Control – NOT For Computer (ECM) Controlled Fan Systems - Image 5](https://m.media-amazon.com/images/I/11ZqOEoVWdL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Simple setup that works
*by J***. on March 31, 2022*

**Update after 1 day** After driving at highway speeds then coming to a long red light, the fan doesn’t kick on until above 200 now. Sometimes 201, sometimes 207. The probe in the radiator just isn’t the most accurate. It’s not the probe, but how it relies on contact with the radiator. Hopefully it works in summer heat or I’ll be replacing the probe with an adjustable switch. I’ve seen temps as high as 220 with my stock clutch fan in Florida heat, so as long as it keeps to this range, I guess I’m fine. Used this to replace my mechanical fan. The thermostat in my truck is rated for 195. It’s a backward design with the thermostat in the lower (cool side) radiator hose. I placed the probe ~3” below the upper hose as described in the directions. Even though the switch is preset to 185, my fan actually kicked on at 195 according to my OBD2 scanner. That worked out perfectly. The temp raised to 197 briefly, then dropped down to 192 which is when the fan kicked back off. Hopefully it doesn’t short cycle a lot, but I imagine in summer heat, it’ll be running nonstop regardless in combination with the AC on. I spliced into the 12v wire on my AC clutch and it kicks the fan on when the AC compressor is engaged. The included diode in the green wire is a nice feature. The only complaint I have is the crappy self tapping screw. I drilled out a hole 3/4 the diameter of the screw and it still wouldn’t bite. I end up just bolting the relay to the hole I drilled.

### ⭐⭐⭐⭐⭐ Read the pitfalls of this before you buy
*by J***. on October 20, 2022*

I can’t fault the seller for this product because this was something that was outside of their control. However I had a pretty bad misfortune my relays and my fuses melting out. Now mind you, it is a 12V system And yes mechanical parts break all the time. (Yes I’m still returning this) After wiring this up and running dual fans (10” and 12”) I noticed the fans stopped working. I checked the solder joints and continuity to the fan motors, no issues. (And yes I had the orientation of the props spinning correctly) The instructions say to hook up the green or trigger wire to the AC compressor, however I’ve come to terms that this might not be good, simply because if your AC compressor is kicking on and off at specific temperatures in frequently, it’s ultimately surging the relay. Honestly the more better way is to put a dedicated toggle switch. (And yes I also replaced most of the AC system) Simple bad luck. To those who left bad/negative reviews. This trigger wire might be the reason

### ⭐⭐⭐⭐ Switch actually trips on around 215°F. But everything is easy to install.
*by I***D on September 21, 2020*

The thermostat kit worked great and was easy to install on a 2001 Jeep Wrangler with an aftermarket radiator. The turn on temperature was supposed to be 185°F. But it turns on right at 215°F and turns off around 210. The ideal operating temperature for a Jeep Wrangler of my vintage is 210°F. It is just a bit over the ideal operating temperature for my Jeep but just barely. I will keep it. I really wanted to bring down the operating temperature of my beloved Jeep a bit. But perhaps that comes with its own problems anyway. The only reason for four verses five stars is the inaccurate temperature rating. But everything works great other than that and it was a very, very, simple install. All you need to know are your colours. Still working great after three months.

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-06-04*