What is a car's heater matrix?

A heater matrix forms part of a car’s cooling system, but instead of solely being used to cool down the vehicle’s coolant, it takes the heat from that coolant and uses it to warm the car’s cabin.

Signs of a Bad Heater Control Valve

Can You Drive With A Bad Heater Core? What Are The Symptoms?

Heater core - Wikipedia

Heater Core, Cooling System, Newport News

How to Flush a Heater Core: A Step-by-Step Guide - In The Garage with

Car Heater Repair in Mays Landing, NJ

When does your cars heater core need replacing?

Stay Warm on the Road with a Reliable Car Heating System

Replacing Your Heater Matrix - BreakerLink Blog