Help get warm air flowing to the vents again with the Four Seasons HVAC heater core 98621, an aluminum heater core that carries hot engine coolant through its core so the blower can heat the air headed into the cabin. It fits many vehicles, among them the 1979-1993 Ford Mustang, 1980-1988 Ford Thunderbird and 1979-1983 Ford Fairmont. See the "Vehicles it fits" section for the full list of applications.
- Aluminum heater core: Four Seasons lists this unit as an aluminum heater core.
- Heavy-duty construction: Built heavy-duty for product durability.
- O.E. fit, form and function: Engineered by Four Seasons for O.E. fit, form and function.
- Independently tested: Tested by an independent party for proven quality and performance.
This heater core is backed by Four Seasons' more than 50 years of mobile A/C experience. A heater core works like a small radiator. Engine coolant flows through its passages, and air from the blower picks up heat as it passes across the core on its way to the vents.
Signs a heater core may need replacing include weak or no cabin heat, a sweet coolant smell inside the vehicle, windows that fog up, or damp floor carpeting. Because these signs can have other causes, diagnose the heating system before you replace parts. If a leaking or clogged heater core is the cause, this direct-fit replacement for the listed applications replaces it.
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is this the right 1979-1993 Ford Mustang heater core?
The 1986 and 1987 model years fall within the listed 1979-1993 Ford Mustang application. Check the "Vehicles it fits" section to match it to your exact vehicle.
What other vehicles does this heater core fit?
It also fits the 1980-1988 Ford Thunderbird and the 1979-1983 Ford Fairmont, along with many other Ford, Lincoln and Mercury models. See the "Vehicles it fits" section for the full list.
What does a heater core do?
Hot engine coolant flows through the heater core, and the blower pushes air across it. That air picks up heat before it reaches the cabin vents.
What are signs a heater core may need replacing?
Common signs include weak or no cabin heat, a sweet coolant smell inside, windows that fog up, or damp floor carpeting. Diagnose the cause before you replace the core.
What is the Four Seasons 98621 made of?
Four Seasons describes it as an aluminum heater core with heavy-duty construction. It is independently tested for quality and performance.
