How to replace a heater core in a Ford Fusion?

This is a difficult procedure for the home mechanic, involving numerous hard-to-find fasteners, clips and electrical connectors. First, have the air conditioning refrigerant recovered at a dealer service department or air conditioning shop. Then, disconnect the cable from the negative battery terminal. Drain the cooling system. Disconnect the heater hoses from the heater core inlet and outlet pipes at the firewall and disconnect the thermal expansion valve and the two refrigerant pipes. Remove the instrument panel. On V6 models, remove the lower cowl grille panel to access some HVAC unit fasteners. Tag and disconnect the cables (if equipped) and electrical connectors from the HVAC unit. Remove the mounting fasteners. The heater core is in the right half of the HVAC unit, above the blower motor housing. Remove the heater core cover screws and pull the heater core out of the housing. Installation is the reverse of removal. Don't forget to reconnect the heater core inlet and outlet hoses at the firewall. Use a new gasket where the two air conditioning pipes meet the expansion valve at the firewall. Refill and bleed the cooling system. Have the refrigerant recharged.

Genuine Ford Fusion Heater Core

HVAC Heater Core

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Part Number: HS7Z-19B555-W
$819.84 MSRP: $1220.00
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- Replaced by: HS7Z-19B555-AE
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2020 Ford Fusion | 4 Cyl 1.5 L GAS, 4 Cyl 2.0 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV), 4 Cyl 2.5 L FLEX, 4 Cyl 2.5 L GAS
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Ford Fusion Radiator And Seal Assembly - Heater
Part Number: DG9Z-18476-A
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Product Specifications
- Other Name: Radiator And Seal Assy - Heater; Heater Core
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2013-2020 Ford Fusion | 4 Cyl 1.5 L GAS, 4 Cyl 1.5L GTDI, 4 Cyl 1.6L PI TC ETHNL, 4 Cyl 2.0 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV), 4 Cyl 2.0L Duratec Hybrid (130kW), 4 Cyl 2.0L EcoBoost (200PS), 4 Cyl 2.0L EcoBoost (240PS), 4 Cyl 2.5 L FLEX, 4 Cyl 2.5 L GAS, 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L Duratec FFV (125kW/170PS), 6 Cyl 2.7L | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F55, 6-Speed Manual Transmission - B6, ECVT Auto Trans Power Split, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Product Specifications
- Replaced by: HS7Z-19B555-AF
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2020 Ford Fusion | 4 Cyl 1.5 L GAS, 4 Cyl 2.0 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV), 4 Cyl 2.5 L FLEX, 4 Cyl 2.5 L GAS
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Ford Fusion Core Assembly - Heater
Part Number: 6E5Z-18476-AA
Product Specifications
- Other Name: Core Assy - Heater
- Manufacturer Note: Core And Seal Asy
- Replaced by: AE5Z-18476-BA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2006 Ford Fusion | 4 Cyl 2.3L, 6 Cyl 3.0L DOHC EFI | 5-Speed Automatic Transmission Mazda FNR5, 5-Speed Manual Transmission (G5M), 6-Speed Automatic Transaxle - AWF21, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Fusion Core Assembly - Heater
Part Number: 6E5Z-18476-BA
Product Specifications
- Other Name: Core Assy - Heater
- Manufacturer Note: Core And Seal Asy
- Replaced by: AE5Z-18476-BA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2007-2009 Ford Fusion | 4 Cyl 2.3L, 6 Cyl 3.0L DOHC EFI, 6 Cyl 3.5L DOHC VCT SMPI | 5-Speed Automatic Transmission Mazda FNR5, 5-Speed Manual Transmission (G5M), 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Manual Transmission Mazda G6M, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Fusion Core Assembly - Heater
Part Number: AE5Z-18476-BA
Product Specifications
- Other Name: Core Assy - Heater; Heater Core
- Replaces: 6E5Z-18476-AA, 6E5Z-18476-BA, HC-61
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2006-2012 Ford Fusion | 4 Cyl 2.3L, 4 Cyl 2.5L Duratec HE PFI, 4 Cyl 2.5L PFI Gas/Electric, 6 Cyl 3.0L DOHC EFI, 6 Cyl 3.0L OHC Duratec, 6 Cyl 3.5L DOHC VCT SMPI | 5-Speed Automatic Transmission Mazda FNR5, 5-Speed Manual Transmission (G5M), 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Manual Transmission Mazda G6M, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive

Ford Fusion Heater Core Parts Questions & Experts Answers

Core Assembly - Heater
6E5Z-18476-BA
Q: How to replace a heater core in a Ford Fusion?
A: This is a difficult procedure for the home mechanic, involving numerous hard-to-find fasteners, clips and electrical connectors. First, have the air conditioning refrigerant recovered at a dealer service department or air conditioning shop. Then, disconnect the cable from the negative battery terminal. Drain the cooling system. Disconnect the heater hoses from the heater core inlet and outlet pipes at the firewall and disconnect the thermal expansion valve and the two refrigerant pipes. Remove the instrument panel. On V6 models, remove the lower cowl grille panel to access some HVAC unit fasteners. Tag and disconnect the cables (if equipped) and electrical connectors from the HVAC unit. Remove the mounting fasteners. The heater core is in the right half of the HVAC unit, above the blower motor housing. Remove the heater core cover screws and pull the heater core out of the housing. Installation is the reverse of removal. Don't forget to reconnect the heater core inlet and outlet hoses at the firewall. Use a new gasket where the two air conditioning pipes meet the expansion valve at the firewall. Refill and bleed the cooling system. Have the refrigerant recharged.