Four Seasons 90500 HVAC Heater Core

Four Seasons 90500 Heater Core Overview

Four Seasons 90500 is an aluminum HVAC heater core built for direct replacement in select Chrysler and Dodge full-size applications. It is specified for vehicles without air conditioning and is listed to meet or exceed OEM requirements for the covered applications.

Use this heater core when servicing heating performance on classic Chrysler 300, Imperial, New Yorker, Newport, Town & Country, Charger, and Monaco models. The Four Seasons Heater Core line focuses on replacement parts that match the original system layout and dimensions for the application.

Key Features

• Aluminum heater core construction
• Core dimensions: 7 in. height, 7-7/8 in. width, 1-1/4 in. depth
• Tube size: 0.625 in. on both connections
• Meets or exceeds OEM requirements for listed applications
• Designed for HVAC heater core replacement service
• Fits vehicles with no A/C as noted in the fitment data

Application Details

This Four Seasons heater core, part number 90500, is listed for 1965-1970 Chrysler and Dodge models including Chrysler 300, Imperial, New Yorker, Newport, Town & Country, Dodge Charger, and Dodge Monaco. Fitment varies by model year and original heater configuration, so confirm the vehicle’s HVAC setup before ordering. This part cross-references Spectra Premium 94500 for the same application.

Common Problems This Part Can Address

• Loss of cabin heat from a leaking or restricted heater core
• Coolant odor inside the passenger compartment
• Fogging or film on the inside of the windshield caused by heater core seepage
• Uneven or weak heat output from the HVAC system
• Corrosion-related failure in the original aluminum or copper/brass core

Installation Notes and Tips

Verify the original heater core dimensions, tube size, and vehicle configuration before installation. This part is listed for w/o AC applications, so confirm the HVAC case and hose routing match the replacement core. Inspect hoses, clamps, and the cooling system for contamination or wear during service to help prevent repeat failure.

Quality Assurance

Four Seasons identifies this heater core as meeting or exceeding OEM requirements for the listed applications. The aluminum construction and application-specific sizing support a direct-fit replacement approach for classic Chrysler and Dodge heater core service.