How to Properly Maintain and Replace the Heater Core in a Mercury Mariner?

To service the heater core, drain the coolant, disconnect the heater hoses, and remove the instrument panel and temperature blend door lever. Take out the heater core cover and the heater core. Reinstall in reverse order, ensuring proper positioning of components, and fill the cooling system. Conduct a leak test if needed.

How to Maintain and Fix a Heater Core and What Steps Are Involved for a Mercury Cougar?

In order to fix the heater core, one should remove battery, empty a cooling system and elevate the car. Take off the hoses, floor console and air bag monitor. Loosen different parts, afterwards detach the heater core. Install in reverse sequence, refill cooling system and test.

OEM Mercury Heater Core

HVAC Heater Core

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

28 Heater Cores found

View related parts
Mercury Heater Core Part Number: H2MZ-18476-M
$70.01 MSRP: $95.27
You Save: $25.26 (27%)
ADD TO CART
Product Specifications
- Other Name: Heater Assembly - Less Radiator; HVAC Heater Core
- Replaces: YL8Z-18476-AA, HC-28
Fits the following Mercury Models:
- Mariner | 2005-2007 | Base, Convenience, Hybrid, Luxury, Premier | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
View related parts
Mercury Heater Core Part Number: H2MZ-18476-AC
$77.29 MSRP: $122.73
You Save: $45.44 (38%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Heater Assembly - Less Radiator; HVAC Heater Core; Core
- Replaces: F5TZ-18476-A, HC-14
Fits the following Mercury Models:
- Mountaineer | 1997-2001 | Base | 6 Cyl 4.0 L GAS, 8 Cyl 5.0 L GAS
View related parts
Mercury Heater Core, Front Part Number: H2MZ-18476-S
$83.63 MSRP: $115.69
You Save: $32.06 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Heater Assembly - Less Radiator; HVAC Heater Core, Front; HVAC Heater Core
- Position: Front
- Replaces: 4F2Z-18476-AA, HC-38
Fits the following Mercury Models:
- Monterey | 2004-2007 | Base, Convenience, Luxury, Premier | 6 Cyl 4.2 L GAS
View related parts
Mercury Heater Core Part Number: XF5Z-18476-AA
$72.79 MSRP: $100.70
You Save: $27.91 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Heater Assembly - Less Radiator; HVAC Heater Core; Core Assembly - Heater
- Manufacturer Note: Main Unit
Fits the following Mercury Models:
- Villager | 1999-2002 | Base, Estate, Sport | 6 Cyl 3.3 L GAS
View related parts
Mercury Heater Core Part Number: F3XY-18476-B
$111.04 MSRP: $153.61
You Save: $42.57 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Core Assembly - Heater
- Manufacturer Note: Main Unit
Fits the following Mercury Models:
- Villager | 1993-1998 | GS, LS, Nautica | 6 Cyl 3.0 L GAS
View related parts
Mercury Heater Core Part Number: YS2Z-18476-AA
$151.78 MSRP: $206.54
You Save: $54.76 (27%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Heater Assembly - Less Radiator
- Manufacturer Note: Core
Fits the following Mercury Models:
- Cougar | 1999-2002 | Base, S, V6 | 4 Cyl 2.0 L GAS, 6 Cyl 2.5 L GAS
- Mystique | 1996-2000 | GS, LS | 4 Cyl 2.0 L GAS, 6 Cyl 2.5 L GAS
View related parts
Mercury Heater Core Part Number: E9LY-18476-A
Product Specifications
- Other Name: Core Assembly - Heater; HVAC Heater Core; Core
Fits the following Mercury Models:
- Capri | 1984-1986 | 5.0, GS, RS, RS Turbo | 4 Cyl 2.3 L GAS, 6 Cyl 3.8 L GAS, 8 Cyl 5.0 L GAS
- Cougar | 1984-1988 | Base, LS, XR-7 | 4 Cyl 2.3 L GAS, 6 Cyl 3.8 L GAS, 8 Cyl 5.0 L GAS
- Marquis | 1984-1986 | Base, Brougham | 4 Cyl 2.3 L GAS, 4 Cyl 2.3 L LPG, 6 Cyl 3.8 L GAS
View More
View related parts
Mercury Heater Core Part Number: H2MZ-18476-Z
Product Specifications
- Other Name: Heater Assembly - Less Radiator; HVAC Heater Core
- Replaces: 8L8Z-18476-A, HC-50
Fits the following Mercury Models:
- Mariner | 2008-2011 | Base, Hybrid, Premier | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
View related parts
Mercury Heater Assembly Part Number: 9L5Z-18471-B
Product Specifications
- Other Name: Duct - Air Vent; HVAC Heater Core Case Assembly; Heater Core Case; HVAC Unit Case; Heater Core; Housing Assembly; Case Assembly; Heater Case
- Replaces: 7L5Z-18471-A, 8L5Z-18471-A, 9L5Z-18471-A
Fits the following Mercury Models:
- Mountaineer | 1997-2001 | Base | 6 Cyl 4.0 L GAS, 8 Cyl 5.0 L GAS
View related parts
Mercury Heater Core, Front Part Number: AA5Z-18476-B
Product Specifications
- Other Name: Radiator And Seal Assembly - Heater; HVAC Heater Core, Front; HVAC Heater Core
- Manufacturer Note: Includes Seal
- Position: Front
- Replaces: HC-53, AA5Z-18476-A, 8G1Z-18476-A
Fits the following Mercury Models:
- Sable | 2008-2009 | Base, Premier | 6 Cyl 3.5 L GAS
View related parts
Mercury Heater Core Part Number: H2MZ-18476-H
Product Specifications
- Other Name: Heater Assembly - Less Radiator; HVAC Heater Core
- Replaces: HC-20, F8VZ-18476-AA
Fits the following Mercury Models:
- Grand Marquis | 1998-2000 | GS, LS | 8 Cyl 4.6 L GAS
View related parts
Mercury Heater Core Part Number: F3XY18476A
Product Specifications
- Other Name: Heater Assembly - Less Radiator; HVAC Heater Core
Fits the following Mercury Models:
- Villager | 1993-1998 | GS, LS, Nautica | 6 Cyl 3.0 L GAS
View related parts
Mercury Heater Core Part Number: H2MZ-18476-J
Product Specifications
- Other Name: Heater Assembly - Less Radiator; HVAC Heater Core; Core
- Replaces: HC-31
Fits the following Mercury Models:
- Colony Park | 1990-1991 | GS, LS | 8 Cyl 5.0 L GAS
- Grand Marquis | 1990-2011 | GS, GSL, Limited Edition, LS, LSE, Ultimate Edition | 8 Cyl 4.6 L FLEX, 8 Cyl 4.6 L GAS, 8 Cyl 5.0 L GAS
- Marauder | 2003-2004 | Base | 8 Cyl 4.6 L GAS
View More
View related parts
Mercury Heater Core Part Number: H2MZ-18476-T
Product Specifications
- Other Name: Heater Assembly - Less Radiator; HVAC Heater Core
- Replaces: HC-39, 5F9Z-18476-DA
Fits the following Mercury Models:
- Montego | 2005-2007 | Luxury, Premier | 6 Cyl 3.0 L GAS
View related parts
Mercury Heater Assembly Part Number: XF5Z-18478-BA
Product Specifications
- Other Name: Heater Core
- Manufacturer Note: MANUAL
Fits the following Mercury Models:
- Villager | 1999-2002 | Base, Estate, Sport | 6 Cyl 3.3 L GAS
View related parts
Mercury Heater Core Part Number: H2MZ-18476-A
Product Specifications
- Other Name: Heater Assembly - Less Radiator; HVAC Heater Core
- Replaces: F5OY-18476-A, HC-19, F8OZ-18476-AA
Fits the following Mercury Models:
- Sable | 1996-2005 | G, GS, LS, LS Premium, Platinum Edition | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
View related parts
Mercury Heater Core, Front Part Number: H2MZ-18476-Y
Product Specifications
- Other Name: Heater Assembly - Less Radiator; HVAC Heater Core, Front; HVAC Heater Core
- Position: Front
- Replaces: 7L2Z-18476-A, HC-41, 5L2Z-18476-AA, 6L2Z-18476-A, HC-47
Fits the following Mercury Models:
- Mountaineer | 2002-2010 | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS
View related parts
Mercury Heater Core, Rear Part Number: H2MZ-18476-X
Product Specifications
- Other Name: Heater Assembly - Less Radiator; HVAC Heater Core, Rear; HVAC Heater Core
- Position: Rear
- Replaces: 1L2Z-18476-CA, HC-32, HC-25, F85Z-18476-AA, HC-22
Fits the following Mercury Models:
- Monterey | 2004-2007 | Base, Convenience, Luxury, Premier | 6 Cyl 4.2 L GAS
- Mountaineer | 2002-2010 | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS
View related parts
Mercury Heater Core Part Number: AE5Z-18476-BA
Product Specifications
- Other Name: Core Assembly - Heater; HVAC Heater Core
- Replaces: 6E5Z-18476-AA, 6E5Z-18476-BA, HC-61
Fits the following Mercury Models:
- Milan | 2006-2011 | Base, Hybrid, Premier | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
View related parts
Mercury Heater Assembly Part Number: 6L8Z-18478-AA
Product Specifications
- Other Name: HVAC Unit Case Assembly; Heater Core
- Replaces: 5L8Z-18478-A
Fits the following Mercury Models:
- Mariner | 2005-2007 | Base, Convenience, Hybrid, Luxury, Premier | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS

| Page 1 of 2 |Next >

1-20 of 28 Results

Mercury Heater Core Parts and Q&A

Heater Assembly
6L8Z-18478-AA
Q: How to Properly Maintain and Replace the Heater Core in a Mercury Mariner?
A: To service the heater core, drain the coolant, disconnect the heater hoses, and remove the instrument panel and temperature blend door lever. Take out the heater core cover and the heater core. Reinstall in reverse order, ensuring proper positioning of components, and fill the cooling system. Conduct a leak test if needed.
Heater Core
YS2Z-18476-AA
Q: How to Maintain and Fix a Heater Core and What Steps Are Involved for a Mercury Cougar?
A: In order to fix the heater core, one should remove battery, empty a cooling system and elevate the car. Take off the hoses, floor console and air bag monitor. Loosen different parts, afterwards detach the heater core. Install in reverse sequence, refill cooling system and test.