Four Seasons 91561 HVAC Heater Core
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Four Seasons
 Heater Core

Four Seasons 91561 HVAC Heater Core

Brand Four Seasons 91561
Length 8
Thickness 2-1/2
Width 6
Core Material Copper
Adjustable Pipe Positioning No
Core Depth IN 2.500
Core Height IN 8.000
Core Width IN 6.000
Description Heater cores
Meets / Exceeds OEM? Yes
Style Copper/brass heater core
Tube 1 IN 0.625
Tube 1 MM 15.875
Tube 2 IN 0.750
Tube 2 MM 19.050
Type Heater core /copper brass
Product line Heater Core
Fits Ford and Mercury · 7 vehicles

OE-matching design. Meets or exceeds OEM requirements for a direct replacement fit.

Copper/brass construction. Built with a copper core for efficient heat transfer.

Heater core. Restores cabin heat through the HVAC system.

Cross-references ACI 399001, Anchor 8009 and APDI 9010082 for the same application. See all 27.

$85.23Free shipping
In stock · usually ships same day before 1pm CST
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Step 2 — Quantity
Order total $85.23
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Free returns within 60 days if it doesn't fit when fitment is verified.
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Four Seasons 91561 Heater Core Overview

The Four Seasons 91561 heater core is a copper/brass HVAC heater core built to meet or exceed OEM requirements. It is specified for 1965-1967 Ford LTD, 1965-1967 Mercury Colony Park, and 1967 Mercury Marquis vehicles equipped with air conditioning.

As part of the Four Seasons Heater Core line, this replacement focuses on correct core dimensions, tube sizing, and OE-style construction for service work on classic Ford and Mercury heating systems.

Key Features

  • Copper core material with copper/brass heater core construction
  • Core dimensions: 8 in. height, 6 in. width, 2-1/2 in. depth
  • Tube sizes: 0.625 in. and 0.750 in.
  • Meets or exceeds OEM specifications
  • Fixed pipe positioning; adjustable pipe positioning: No
  • Four Seasons part number 91561

Detailed Description

The Four Seasons 91561 heater core is a direct-fit HVAC heater core for classic Ford and Mercury applications that use air conditioning. Its copper/brass design supports efficient heat transfer and serviceable OE-style replacement characteristics, while the listed dimensions help confirm fitment before installation. This part cross-references Dorman - HELP 94561 for the same application.

Fits 1965-1967 Ford LTD, N/A. Fits 1965-1967 Mercury Colony Park, N/A. Fits 1967 Mercury Marquis, N/A. The Four Seasons 91561 and Four Seasons Heater Core line are commonly searched for restoration and maintenance work on these vehicles.

What It Helps Address

  • Loss of cabin heat from a leaking or restricted heater core
  • Coolant odor or moisture inside the passenger compartment
  • Poor defrost performance caused by reduced heater output
  • Temperature inconsistency in the HVAC system
  • Service replacement for aging copper/brass heater core assemblies

Installation Notes and Tips

Verify core height, width, depth, and tube diameters against the removed unit before installation. Confirm the vehicle is equipped with air conditioning, since the listed fitment applies to those configurations. Inspect hoses, clamps, and the HVAC case for wear or corrosion during service, and flush the cooling system if contamination is present.

Quality Assurance

This heater core is listed as meeting or exceeding OEM requirements. Four Seasons identifies this part within its Heater Core product line for replacement service on supported Ford and Mercury applications.

Related reading

This part fits 7 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
1967FordLTDN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1967MercuryColony ParkN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1967MercuryMarquisN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1966FordLTDN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1966MercuryColony ParkN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1965FordLTDN/ACompatible with vehicles equipped with air conditioning.; Heater Core
1965MercuryColony ParkN/ACompatible with vehicles equipped with air conditioning.; Heater Core
Directly replaces or cross-references 27 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
ACI — 399001Anchor — 8009APDI — 9010082Dorman - HELP — 94561Four Seasons — 90011Four Seasons — 91561Four Seasons — 98561Global Parts Distributors LLC — 1811751OSC — 2323OSC — 2324250509279304398009554561609304702323156257515625766603049C5AZ18476BC7AZ18476AFM9001FM9001XH2197HT398009HT399001ZH509