Restore cabin heat and tackle your Ford Explorer heater core replacement with the Four Seasons Heater Core 98700A. This aluminum HVAC heater core is a direct-fit replacement that circulates hot engine coolant while the blower pushes air across its fins to warm the passenger compartment. It fits the 1991-1994 Ford Explorer, 1984-1990 Ford Bronco II and 1983-1995 Ford Ranger, plus the 1994 Mazda B2300, B2900, B3000 and B4000 and the 1991-1994 Mazda Navajo — see the Buyer's Guide tab for engine-level fitment.
- Aluminum core: lightweight aluminum construction handles coolant heat transfer.
- Heavy-duty build: durable construction for long service.
- O.E. fit, form and function: engineered to match the original for a straightforward install.
- Independently tested: verified for quality and performance, backed by over 50 years of Four Seasons mobile A/C experience.
Signs the original may need replacing include a sweet coolant odor in the cabin, fogged windows, damp carpet, coolant loss or little to no heat. If a leaking or clogged heater core is the cause, this unit replaces it.
Interchange: 9010244 · 556700 · 398001 · 4L3Z18476DA · E27H18476A · E27H18476AB · E3TZ18476A · E3TZ18476J · E9TZ18476A · H2MZ18476D · 8231321 · ZZL061A10 · 6870 · 94700 · 2758001 · 1811405 · HT6100 · HT8001 · HT8001C
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does the Four Seasons 98700A heater core do?
It routes hot engine coolant through its aluminum core while the blower forces air across the fins, warming the air sent into the passenger compartment.
Will this heater core fit my Ford Ranger?
Yes, it is a direct-fit replacement for the 1983-1995 Ford Ranger, along with the listed Explorer, Bronco II, Mazda B-series and Navajo applications. Check the Buyer's Guide tab to confirm your vehicle.
What is this heater core made of?
It uses aluminum construction, as listed in the manufacturer's specifications.
What are the signs of a bad heater core?
Common signs include a sweet coolant smell inside the cabin, fogged windows, damp carpet, unexplained coolant loss, or weak-to-no heat from the vents.
Does this fit the Ford Explorer?
Yes, it is listed as a replacement for the 1991-1994 Ford Explorer. Verify your specific year and configuration against the Buyer's Guide tab.
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