---
product_id: 226331276
title: "W3230 20A 12V Digital Thermostat, Digital Temperature Controller Regulator Heating Cooling Control Thermometer Instrument"
brand: "aideepen"
price: "£16.00"
currency: GBP
in_stock: true
reviews_count: 13
category: "Aideepen"
url: https://www.desertcart.co.uk/products/226331276-w3230-20a-12v-digital-thermostat-digital-temperature-controller-regulator-heating
store_origin: GB
region: United Kingdom
---

# 12V DC power input 0.5s refresh rate Temperature range -55°C to 120°C W3230 20A 12V Digital Thermostat, Digital Temperature Controller Regulator Heating Cooling Control Thermometer Instrument

**Brand:** aideepen
**Price:** £16.00
**Availability:** ✅ In Stock

## Summary

> 🌡️ Stay Cool or Heat Up — Master Your Climate Like a Pro!

## Quick Answers

- **What is this?** W3230 20A 12V Digital Thermostat, Digital Temperature Controller Regulator Heating Cooling Control Thermometer Instrument by aideepen
- **How much does it cost?** £16.00 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/226331276-w3230-20a-12v-digital-thermostat-digital-temperature-controller-regulator-heating)

## Best For

- aideepen enthusiasts

## Why This Product

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

## Key Features

- • **Smart Safety Alerts:** Customizable alarm system to prevent overheating or freezing disasters.
- • **Dual Mode Flexibility:** Seamlessly switch between heating and cooling to suit any scenario.
- • **Plug & Play Simplicity:** Compact design with 1m sensor wire and intuitive controls for quick setup.
- • **User-Centric Calibration:** Fine-tune temperature readings with easy calibration for perfect accuracy.
- • **Precision at Your Fingertips:** Ultra-accurate 0.1°C temperature control for flawless environment management.

## Overview

The Aideepen W3230 is a compact, 12V digital thermostat offering precise temperature control from -55°C to 120°C with 0.1°C accuracy and a rapid 0.5-second refresh rate. Designed for professional-grade heating and cooling regulation, it features selectable modes, customizable alarms, temperature calibration, and a user-friendly interface, making it ideal for applications like caravan fridges, aquariums, and industrial environments.

## Description

Aideepen W3230 20A 12V Digital Thermostat, Digital Temperature Controller Regulator Heating Cooling Control Thermometer Instrument : desertcart.co.uk: Business, Industry & Science

Review: Great fan controller - Works excellent controlling fans in the caravan fridge in hot weather set at 39° with a 4° waiting works perfect
Review: Works well but lack of instructions - It’s a small unit and could do with being a bit bigger. Easy to wire up but not so easy to configure. I purchased it for heating control of a a PTC system. Once it gets to 40 I wanted the relay to switch off. Simple enough in theory, but difficult practically. I managed to sort it by just playing around with it over half an hour in the end. For £10 a budget, entry level unit that works well, just difficult to setup.

## Features

- ✔ Temperature controller system power input: DC 12V; temperature control range: -55°C to 120°C; temperature measurement accuracy: 0.1°C; refresh rate: approximately 0.5s. Sensor wire: 1 meter
- ✔ Dimensions: 79*43*26mm; cutout dimensions: 76*39mm. Manual download: Please enter all characters enclosed in brackets (http://8.217.75.21/Industrial/Multilingual/CBAA0029-018_UK.pdf)
- ✔ Multiple Functions: Selectable cooling or heating operating mode, with a °C/°F switch function, adaptable to different scenarios. P0-P9 has 10 parameter/function settings. (Note: Please contact us if you have any questions.)
- ✔ Cooling/Heating: After setting parameters such as heating/cooling mode, start temperature, and temperature differential according to the manual, the device automatically controls the cooling/heating function when the set conditions are met.
- ✔ Temperature Calibration: If the temperature controller's measured temperature deviates, the temperature can be calibrated as needed for accurate temperature control.
- ✔ Alarm function: When the temperature reaches the set temperature, the controller will alarm (-55~120℃). You can also set the maximum/minimum upper limit temperature to avoid accidents. (For more functions, please refer to the detailed description or instruction manual)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08DD9LNZL |
| Best Sellers Rank | 12,002 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 11 in Temperature Controllers |
| Brand | Aideepen |
| Colour | 1Pack W3230 12V |
| Country Of Origin | China |
| Customer Reviews | 4.2 4.2 out of 5 stars (393) |
| Included Components | W3230 Digital Temperature Controller*1 + Instruction Manual*1 |
| Item Weight | 50 Grams |
| Manufacturer | Aideepen |
| Manufacturer Part Number | A7012442 |
| Material | Polycarbonate (PC) |
| UPC | 782940081775 |
| Voltage | 12 Volts |

## Product Details

- **Brand:** Aideepen
- **Colour:** 1Pack W3230 12V
- **Item weight:** 50 Grams
- **Material:** Polycarbonate (PC)
- **Voltage:** 12 Volts

## Images

![W3230 20A 12V Digital Thermostat, Digital Temperature Controller Regulator Heating Cooling Control Thermometer Instrument - Image 1](https://m.media-amazon.com/images/I/61jx+jFUeQL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: How long will the settings be retained when the power is taken off?**
A: You can safe the settings by turning P7 ON

**Q: Can I use this controller to switch a 250v ac aquarium heater? Thanks in advance**
A: The relay should be able to handle that providing the heater doesn't draw more than 10A, which I imagine it doesn't as it would turn your aquarium into a kettle. Be aware that this unit is powered from a 12V supply. You can buy similar units that can be powered from the mains (such as https://www.amazon.co.uk/dp/B089RKGW5C/) if you don't want/have a separate power supply.

**Q: Will it keep the settings if the power is cut**
A: I disconnect this when charging up the car battery to which it is connected. The settings are retained during this time.

**Q: Can you set a hysteresis value for the SET temperature (so the output stays on until temperature drops below the  hysteresis)?**
A: No. This is a simple switch on switch of the heater once the set desired temperature is set.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great fan controller
*by C***. on 4 August 2025*

Works excellent controlling fans in the caravan fridge in hot weather set at 39° with a 4° waiting works perfect

### ⭐⭐⭐⭐ Works well but lack of instructions
*by M***Y on 2 June 2023*

It’s a small unit and could do with being a bit bigger. Easy to wire up but not so easy to configure. I purchased it for heating control of a a PTC system. Once it gets to 40 I wanted the relay to switch off. Simple enough in theory, but difficult practically. I managed to sort it by just playing around with it over half an hour in the end. For £10 a budget, entry level unit that works well, just difficult to setup.

### ⭐⭐⭐⭐⭐ Wiring up the controller
*by B***A on 22 June 2023*

After a shaky start due to total lack of instruction, I was about to give up when I found the attached diagram. Basically, I had just wired the 12v supply directly to VCC & GND which did supply the power for the controller. It allowed me to program everything etc. Try as I might, having connected my fridge vent fans directly to S1 & S2, I could not get the fans to work? I assumed, wrongly, that a ‘bridge’ was built into the PCB? Not the case, so wired like the schematic shows, had all up and running in no time! Very pleased overall, can’t comment on longevity of the unit but for the price, a good solution to help keep my fridge running efficiently. The manufacturer also has a website if you search this product description which has a lot more info on setting up all the parameters.

## Frequently Bought Together

- Aideepen W3230 20A 12V Digital Thermostat Digital Temperature Controller Regulator Heating Cooling Control Thermometer Instrument
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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-21*