---
product_id: 3322583
title: "Hayden Automotive 3652 Universal Add-On Preset Thermostatic Fan Control – NOT For Computer (ECM) Controlled Fan Systems"
brand: "hayden automotive"
price: "€ 55.99"
currency: EUR
in_stock: true
reviews_count: 6
category: "Hayden Automotive"
url: https://www.desertcart.gr/products/3322583-hayden-automotive-3652-universal-add-on-preset-thermostatic-fan-control
store_origin: GR
region: Greece
---

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

**Brand:** hayden automotive
**Price:** € 55.99
**Availability:** ✅ In Stock

## Summary

> 🌬️ Keep your engine cool and your ride cooler—never sweat the heat again!

## Quick Answers

- **What is this?** Hayden Automotive 3652 Universal Add-On Preset Thermostatic Fan Control – NOT For Computer (ECM) Controlled Fan Systems by hayden automotive
- **How much does it cost?** € 55.99 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/3322583-hayden-automotive-3652-universal-add-on-preset-thermostatic-fan-control)

## 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

- • **Easy Installation:** Probe installs directly into radiator fins—no complex modifications needed
- • **Built-In Fan Override:** Manual override lead lets you activate fans on demand for ultimate control
- • **Durable & Replaceable:** Sturdy design with replaceable thermostat ensures long-term performance
- • **Universal Compatibility:** Works seamlessly with Hayden and OEM electric fans for hassle-free upgrades
- • **Precision Temperature Control:** Preset at 185°F for reliable fan activation without guesswork

## Overview

The Hayden Automotive 3652 is a 185°F preset thermostatic fan control designed for universal compatibility with Hayden and original equipment electric fans. It features a radiator fin probe for accurate temperature sensing, a 12V universal power connector, and a manual fan override lead. This durable, easy-to-install unit automates fan operation to prevent overheating, making it an essential upgrade for reliable engine cooling.

## 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: Works Great, Easy to Install - I got this for my 2005 Dodge Ram 1500 5.7 Hemi. I have 2 aftermarket radiators so I needed a thermostat to turn on the fans. I had installed previously a variable thermostat and that worked for about a year. SO I decided to try this one, it is not adjustable, and looks pretty sturdy, all the wires plug right into the relay. The thermostat looks replaceable as well, so if that goes bad, I can find a replacement. The wiring is pretty straight forward, if you have some skills with automotive or basic electronic skills, you can do this in your garage. So far, it works, I no longer have to baby-sit my temp gauge to make sure I'm not over-heating, turns itself on and off, and the wiring has wires for at least 2 fans, and both mine are working. There is also a 'over-ride' switch lead so you can manually turn on the fans. So far I'm pretty happy with this set up, time will tell if it will outlast the last one I had. Phoenix AZ heat will determine that.

## 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 | #719,542 in Automotive ( See Top 100 in Automotive ) #129 in Automotive Replacement Engine Fan Electric Controls |
| Brand | Hayden Automotive |
| Compatible Devices | Automotive Engine |
| Cooling Method | temperature-based |
| Customer Reviews | 4.1 4.1 out of 5 stars (882) |
| Date First Available | July 7, 2004 |
| Exterior | Machined |
| Global Trade Identification Number | 00036752036523 |
| Is Discontinued By Manufacturer | Yes |
| Item Weight | 6.4 ounces |
| Item model number | 3652 |
| Manufacturer | Hayden Automotive |
| Manufacturer Part Number | 3652 |
| Material | Plastic |
| Model | Fan Control |
| Noise Level | 14 Decibels |
| Number of Items | 1 |
| 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 |

## 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

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

### ⭐⭐⭐⭐⭐ Works Great, Easy to Install
*by B***Y on August 9, 2020*

I got this for my 2005 Dodge Ram 1500 5.7 Hemi. I have 2 aftermarket radiators so I needed a thermostat to turn on the fans. I had installed previously a variable thermostat and that worked for about a year. SO I decided to try this one, it is not adjustable, and looks pretty sturdy, all the wires plug right into the relay. The thermostat looks replaceable as well, so if that goes bad, I can find a replacement. The wiring is pretty straight forward, if you have some skills with automotive or basic electronic skills, you can do this in your garage. So far, it works, I no longer have to baby-sit my temp gauge to make sure I'm not over-heating, turns itself on and off, and the wiring has wires for at least 2 fans, and both mine are working. There is also a 'over-ride' switch lead so you can manually turn on the fans. So far I'm pretty happy with this set up, time will tell if it will outlast the last one I had. Phoenix AZ heat will determine that.

### ⭐⭐⭐⭐ 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 Greece*
*Store origin: GR*
*Last updated: 2026-01-31*