Keep warm air flowing to the cab with the Four Seasons heater core (P/N 96122). This aluminum unit is engineered as a direct-fit replacement, matching the original's O.E. fit, form and function on the 1984-2002 Mack DM, 1984-2002 Mack DMM, 1984-1989 Mack R, 1984-2002 Mack RD and 1989-2002 Mack RB — see the Buyer's Guide tab for engine details and the complete application list.
A heater core is a small radiator-style component: hot engine coolant flows through its tubes while the blower pushes cabin air across its fins, transferring that heat to warm the interior and help clear the glass. If a leaking or clogged original core is the cause of weak heat, a sweet coolant odor, fogged windows or coolant on the floor, this Four Seasons hvac heater core replaces it.
- Aluminum construction for the core.
- Heavy-duty build for durability in demanding service.
- Quality engineering for O.E. fit, form and function.
- Independently tested for proven quality and performance.
Backed by Four Seasons' decades of mobile A/C experience.
Frequently Asked Questions
What is the Four Seasons hvac heater core P/N 96122?
It's an aluminum replacement heater core that routes engine coolant through its tubes so the blower can transfer that heat to the cab air to warm the interior and help clear the glass.
Which vehicles does this heater core fit?
It's a direct-fit replacement for the 1984-2002 Mack DM, 1984-2002 Mack DMM, 1984-1989 Mack R, 1984-2002 Mack RD and 1989-2002 Mack RB. Check the Buyer's Guide tab for engine details.
What are the signs of a failing heater core?
Common signs include weak or no cabin heat, a sweet coolant smell inside, fogged-up windows, or coolant pooling on the floor. Diagnose the cause before replacing.
What is this heater core made of?
The core is aluminum construction, built heavy-duty for durability and independently tested for proven quality and performance.
Is this a direct-fit replacement?
Yes. It's engineered for O.E. fit, form and function on the listed Mack applications, so it installs in place of the original heater core.
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