Ford Sierra Manual

Heater unit - overhaul
Cooling, heating and air conditioning systems / Heater unit - overhaul


1 With the heater unit removed from the vehicle, remove the two securing screws and withdraw the heater matrix from the casing (see illustrations).

19.1a Remove the securing screws . . .
19.1a Remove the securing screws . . .

19.1b . . . and withdraw the heater matrix
19.1b . . . and withdraw the heater matrix

2 Cut the heater casing gasket in line with the casing joint, then use two suitable screwdrivers to prise off the retaining clips and separate the casing halves. Withdraw the lower part of the casing to the side.

3 Remove the air flap valves, then press the control levers from the casing. Note that the Уup/downФ control lever can only be removed when the marks are aligned as shown (see illustration).

19.3 Heater Уup/downФ control lever must be aligned as shown before removal
19.3 Heater Уup/downФ control lever must be aligned as shown before removal Note that the cross marks are for right-hand drive vehicles

4 Clean all components and hose through the matrix to remove any debris. If necessary use a chemical cleaner to clear the inner passage of the matrix. Renew the components as necessary.

5 Reassembly is a reversal of dismantling.


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