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.
Heater Core Backflushing
2021 Ford Edge SE, 4WDSECTION Heater Core Backflushing
WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
For information on Ford Color Coded Illustrations refer to OEM Color Coding .
Materials
| Name | Specification |
|---|---|
| Motorcraft ® Premium Cooling System Flush VC-1 | ESR-M14P7-A |
Flushing
WARNING:
Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.
- Partially drain the cooling system. Refer to: Cooling System Draining, Vacuum Filling and Bleeding .
- Add Premium Cooling System Flush to backflush the heater core and follow the directions on the package. Flush with water thoroughly after using Premium Cooling System Flush prior to refilling the cooling system.
Material: Motorcraft ® Premium Cooling System Flush / VC-1 (ESR-M14P7-A)
- Fill and bleed the cooling system. Refer to: Cooling System Draining, Vacuum Filling and Bleeding .
RENDER: 1.0x
NO RELATED
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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.