Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSLINCOLN2010MKZ FWD V6-3.5LREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGHEATER CORESERVICE AND REPAIR
2010 Lincoln MKZ FWD V6-3.5L
Heater Core: Service and Repair
2010 Lincoln MKZ FWD V6-3.5LSECTION Service and Repair
Heater Core
Removal and Installation
NOTE: If a heater core leak is suspected, the heater core must be pressure leak tested before it is removed from the vehicle. Component Tests and General Diagnostics
1. Remove the heater core and evaporator core housing. For additional information, refer to Heater Core And Evaporator Core Housing Service and Repair.
2. Detach the wire harness from the heater core cover.
3. Remove the 8 heater core cover screws.
4. Remove the heater core cover.
5. Remove the dash panel seal from the heater core tubes.
6. Remove the heater core.
7. To install, reverse the removal procedure.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.