Universal 12 VOLT Underdash Heater Heat w/ Speed Switch for Car or Truck 4 port

Universal 12 Volt Underdash Heater with Speed Switch for Car or Truck

This universal 12 volt underdash heater with a 4 port design and speed switch adds cabin warmth to cars, trucks, and other 12 volt vehicles that lack a working factory heater.

Overview

This 12 volt underdash heater mounts beneath the dash to deliver warm air directly into the cabin using a built-in fan and 4 port airflow. The included speed switch lets the driver adjust fan output to match conditions. Ideal for older cars, trucks, off-road rigs, or any vehicle needing supplemental heat.

Built For Performance

• 12 volt operation for standard automotive electrical systems
• 4 port design for flexible ducting and airflow direction
• Speed switch for adjustable fan output
• Underdash mounting style that saves cabin space
• Universal fitment across many car and truck applications

On-The-Job Use

• Vintage cars and trucks without a functional heater
• Off-road and utility vehicles needing cabin warmth
• Work trucks used in cold climates
• Custom builds adding supplemental heat

Specs At A Glance

Good To Know

Q: Will this heater work in any vehicle? A: It is designed for 12 volt systems common in most cars and trucks. Confirm your vehicle runs a 12 volt electrical system before ordering.

Q: Does the speed switch control temperature? A: The speed switch controls fan output, which adjusts how much warm air reaches the cabin. It regulates airflow rather than heating element temperature.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.