OE Quality
60-Day Returns

Four Seasons 91775 HVAC Heater Core
Reliable Heater Core Replacement for Ford Festiva
The Four Seasons Heater Core 91775 is designed to restore efficient heating performance in your Ford Festiva. Crafted from durable copper and brass materials, this heater core ensures consistent heat transfer and long-lasting operation.
- Compatible with Ford Festiva models
- Constructed from copper/brass for enhanced durability
- Core dimensions: 5-1/2" length, 6-5/8" width, 1-1/4" thickness
- Meets or exceeds OEM specifications
- Part number 91775 for precise identification
Four Seasons Heater Core Product Line
The Four Seasons Heater Core line focuses on delivering reliable HVAC components that meet or exceed original equipment manufacturer standards. This product line emphasizes quality materials and precise fitment, ensuring that the heater core integrates seamlessly with your vehicle’s heating system. The 91775 heater core is part of this line, offering a copper/brass construction that supports efficient heat exchange and durability.
Product Details and Specifications
This HVAC heater core features a copper core material with brass components, providing excellent thermal conductivity and resistance to corrosion. The core measures 5.5 inches in height, 6.625 inches in width, and 1.25 inches in depth, with tube diameters of 0.625 inches (15.875 mm) for both inlet and outlet. The fixed pipe positioning design ensures a direct replacement without the need for adjustments. Designed specifically for the Ford Festiva, this heater core meets or exceeds OEM standards to maintain your vehicle’s heating efficiency.
Common Issues Addressed by This Heater Core
- Insufficient cabin heat during cold weather
- Coolant leaks inside the vehicle’s HVAC system
- Clogged or corroded heater core reducing heat output
- Unpleasant odors caused by leaking coolant
- Overheating engine due to compromised heater core function
Installation Notes and Tips
When replacing the heater core in your Ford Festiva, ensure the cooling system is properly drained before removal. Handle the copper/brass core carefully to avoid damage to the fins and tubes. Verify that the replacement part number 91775 matches your vehicle’s specifications. After installation, refill and bleed the cooling system to prevent air pockets and ensure optimal heater performance.
Quality Assurance and Warranty
The Four Seasons Heater Core 91775 is manufactured to meet or exceed OEM quality standards, providing reliable performance and durability. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship. Refer to the product packaging or manufacturer documentation for exact warranty terms.
| Brand | Four Seasons |
| Part Number | 91775 |
| Position | Heater Core |
| Length | 5-1/2 |
| Thickness | 1-1/4 |
| Width | 6-5/8 |
| Core Material | Copper |
| Adjustable Pipe Positioning | No |
| Core Depth IN | 1.250 |
| Core Height IN | 5.500 |
| Core Width IN | 6.625 |
| 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 | 0.625 |
| Tube 2 MM | 15.875 |
| Type | Heater core /copper brass |
This part fits 6 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1993 | Ford | Festiva | N/A | Heater Core |
| 1992 | Ford | Festiva | N/A | Heater Core |
| 1991 | Ford | Festiva | N/A | Heater Core |
| 1990 | Ford | Festiva | N/A | Heater Core |
| 1989 | Ford | Festiva | N/A | Heater Core |
| 1988 | Ford | Festiva | N/A | Heater 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.