---
product_id: 473975250
title: "12V Car Auxiliary Heater, 4 Ports Universal Underdash Compact Auxiliary Heater, Winter Automotive Air Conditioner for Heating&Defrosting"
brand: "saihisday"
price: "฿7658"
currency: THB
in_stock: true
category: "Saihisday"
url: https://www.desertcart.co.th/products/473975250-12v-car-auxiliary-heater-4-ports-universal-underdash-compact-auxiliary
store_origin: TH
region: Thailand
---

# 12V power supply for universal compatibility Compact underdash design fits most vehicles 4 vent holes for efficient heat & defrost distribution 12V Car Auxiliary Heater, 4 Ports Universal Underdash Compact Auxiliary Heater, Winter Automotive Air Conditioner for Heating&Defrosting

**Brand:** saihisday
**Price:** ฿7658
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay warm, drive smart — never get caught in the cold again!

## Quick Answers

- **What is this?** 12V Car Auxiliary Heater, 4 Ports Universal Underdash Compact Auxiliary Heater, Winter Automotive Air Conditioner for Heating&Defrosting by saihisday
- **How much does it cost?** ฿7658 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/473975250-12v-car-auxiliary-heater-4-ports-universal-underdash-compact-auxiliary)

## Best For

- saihisday enthusiasts

## Why This Product

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

## Key Features

- • **Quad-Vent Airflow:** Four strategically placed vents ensure rapid, even warmth and clear windshields
- • **Powerful 12V Motor:** Delivers reliable heating and defrosting power wherever you drive
- • **Easy Speed Control Wiring:** Simple 3-wire switch setup for customizable airflow intensity
- • **Universal Fit Compact Design:** Sleek underdash installation fits most cars without sacrificing cabin space
- • **Winter-Ready Defrost & Heating:** Transforms your ride into a cozy, fog-free sanctuary during cold months

## Overview

The Saihisday 12V Car Auxiliary Heater is a compact, underdash automotive heater featuring a powerful blower motor and four vent holes for efficient heating and windshield defrosting. Designed for universal 12V compatibility, it fits most vehicles and offers easy speed control wiring. Ideal for winter, it ensures rapid cabin warmth and clear visibility, making cold-weather driving safer and more comfortable.

## Description

Buy Saihisday 12V Car Auxiliary Heater, 4 Ports Universal Underdash Compact Auxiliary Heater, Winter Automotive Air Conditioner for Heating&Defrosting: Heaters - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## Features

- Function: Designed with powerful blower motor and 4 vent holes, this car air conditioner is used as windscreen defroster, demister and heater in winter
- Type: 4 Ports Universal Underdash Compact Auxiliary Heater; Voltage: 12V; Power Supply: 8A; Fitting Required: 5/8"(16 mm) inner diameter water hose (NOT included)
- Switch Instruction 1: The red wire of the speed control switch is connected with positive pole of power supply and motor
- Switch Instruction 2: The blue wire of the switch is connected with negative pole of motor
- Switch Instruction 3: The black wire of the speed control is connected with negative pole of power supply

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B429F213 |
| Best Sellers Rank | #187,172 in Automotive ( See Top 100 in Automotive ) #35 in Automobile Interior Heaters |
| Brand | Saihisday |
| Customer Reviews | 4.1 4.1 out of 5 stars (126) |
| Date First Available | June 14, 2022 |
| Exterior | Polished |
| Item Weight | 6.96 pounds |
| Item model number | 12V Car Auxiliary Heater |
| Manufacturer | Saihisday |
| Manufacturer Part Number | 12V Car Auxiliary Heater |
| Model | 12V Car Auxiliary Heater |
| OEM Part Number | 12V Car Auxiliary Heater |
| Package Dimensions | 17.76 x 14.57 x 6.06 inches |
| Position | Front |

## Images

![12V Car Auxiliary Heater, 4 Ports Universal Underdash Compact Auxiliary Heater, Winter Automotive Air Conditioner for Heating&Defrosting - Image 1](https://m.media-amazon.com/images/I/71Uahlc8KkL.jpg)

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.co.th/products/473975250-12v-car-auxiliary-heater-4-ports-universal-underdash-compact-auxiliary](https://www.desertcart.co.th/products/473975250-12v-car-auxiliary-heater-4-ports-universal-underdash-compact-auxiliary)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-06-03*