HomeHVAC > Motors, Core, Case and Related ComponentsFour Seasons 98780 HVAC Heater Core
Part #: 98780

Four Seasons 98780 HVAC Heater Core

Heater Core
⚙️ 15 vehicles fit this part
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Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$66.87Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
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🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
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✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
📦Heater Core
🚗Fitment: Mitsubishi and Plymouth, Eclipse, Galant, and Laser
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Four Seasons Heater Core 98780

The Four Seasons Heater Core 98780 is designed to restore efficient heating performance in select Mitsubishi and Plymouth vehicles. Engineered with durable aluminum construction, this heater core ensures reliable heat transfer and long-lasting operation for your HVAC system.

  • Core dimensions: 7-3/4 inches length, 6-3/8 inches width, 1-1/4 inches thickness
  • Constructed from corrosion-resistant aluminum material
  • Tube diameter: 0.625 inches (15.875 mm) for both inlet and outlet
  • Meets or exceeds OEM specifications for quality and fit
  • Compatible with Mitsubishi Eclipse, Galant, and Plymouth Laser models

Detailed Product Description

This Four Seasons Heater Core 98780 belongs to the Heater Core product line, which focuses on delivering reliable HVAC core components for vehicle heating systems. The aluminum heater core design provides efficient heat exchange while resisting corrosion and wear. With precise core dimensions of 7.75 inches in height, 6.375 inches in width, and 1.25 inches in depth, it fits directly into the HVAC housing of compatible Mitsubishi and Plymouth models without modification. The dual 0.625-inch tubes ensure proper coolant flow for consistent heating performance. This heater core is engineered to meet or exceed OEM standards, ensuring a proper fit and function for your Mitsubishi Eclipse, Galant, or Plymouth Laser.

Common Applications and Issues Resolved

  • Restores heating capability in Mitsubishi Eclipse, Galant, and Plymouth Laser vehicles
  • Replaces leaking or clogged heater cores causing coolant loss or poor cabin heat
  • Eliminates unpleasant odors from a failing heater core
  • Prevents fogging of interior windows due to heater core leaks
  • Improves overall HVAC system efficiency and comfort

Installation Notes and Tips

When installing the Four Seasons Heater Core 98780, ensure the vehicle’s cooling system is properly drained before removal. Handle the aluminum core carefully to avoid damage to the fins and tubes. Verify that the heater core dimensions match the OEM part to ensure a correct fit. Reconnect all hoses securely and refill the cooling system with the appropriate coolant. Bleed the system to remove air pockets for optimal heating performance.

Quality Assurance and Warranty

The Four Seasons Heater Core 98780 is manufactured to meet or exceed OEM specifications, providing dependable performance and durability. This part undergoes rigorous quality control to ensure consistent fit and function. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty against defects in materials and workmanship.

BrandFour Seasons
Part Number98780
PositionHeater Core
Length7-3/4
Thickness1-1/4
Width6-3/8
Core MaterialAluminum
Adjustable Pipe PositioningNo
Core Depth IN1.250
Core Height IN7.750
Core Width IN6.375
DescriptionHeater cores
Meets / Exceeds OEM?Yes
StyleAluminum heater core
Tube 1 IN0.625
Tube 1 MM15.875
Tube 2 IN0.625
Tube 2 MM15.875
TypeHeater core /aluminum

This part fits 15 vehicles. Search below:

YearMakeModelPositionNotes
1994MitsubishiEclipseN/AHeater Core
1994PlymouthLaserN/AHeater Core
1993MitsubishiEclipseN/AHeater Core
1993MitsubishiGalantN/AHeater Core
1993PlymouthLaserN/AHeater Core
1992MitsubishiEclipseN/AHeater Core
1992MitsubishiGalantN/AHeater Core
1992PlymouthLaserN/AHeater Core
1991MitsubishiEclipseN/AHeater Core
1991MitsubishiGalantN/AHeater Core
1991PlymouthLaserN/AHeater Core
1990MitsubishiEclipseN/AHeater Core
1990MitsubishiGalantN/AHeater Core
1990PlymouthLaserN/AHeater Core
1989MitsubishiGalantN/AHeater Core

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

15626411811822250479266826803279406398267554780660345170266880926682313608267901024690668947809604698780H8267HT398267MB439468ZH479

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.