Automotive Heating – Heater Core Replacement

Replacing the heater core may become necessary if it is leaking or if it is badly restricted beyond the chance of being able to flush it to get it corrected. The process of replacing the heater core is very similar to the process of replacing the evaporator core, which is covered in chapter

The only difference is that the heater core is replaced instead of the evaporator core. Both of these procedures require large amounts of skill and tools to complete. See the section in chapter 6 that covers evaporator core replacement for details on how to get the duct box out of the vehicle and opened up to service the items inside.

After removing the duct box from the vehicle, the top of the box is removed, which allows the heater core to be removed from the duct

This heater core can be removed by releasing a couple of plastic retaining clips in the duct box top. The whole lid does not need to be removed to service the heater

After installing the new heater core, the top of the duct box is reinstalled. Care should be taken to make sure all of the mode doors and the temperature door are aligned in the normal area of operation prior to tightening the fasteners for the

The heater core has been removed from the duct box. The new heater core should be closely inspected to make sure it will fit properly into the duct

Coolant Flow Valve Replacement

The coolant flow valve can be replaced if it is inoperative or leaking. This valve is easily replaced by simply removing the hose clamps and hoses from the old valve and then reinstalling the hoses and clamps to the new valve.

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