Heater matrix - removal and refitting

Removal
1 With the heater removed from the vehicle as previously described, extract the two securing screws and slide the matrix out of the heater casing.

2 If further dismantling is necessary, cut the casing seal at the casing joint, prise off any securing clips and separate the two halves of the casing.

3 Remove the air flap valves. It should be noted that the lever for the air distribution valve can only be removed when the mark on the lever is in alignment with the one on the gearwheel (see illustration).

12.3 Air distribution valve lever and gear marks (arrowed)
12.3 Air distribution valve lever and gear marks (arrowed)

4 If the heater matrix is leaking, it is best to obtain a new or reconditioned unit. Home repairs are seldom successful. A blocked matrix can sometimes be cleared using a cold water hose and reverse flushing, but avoid the use of searching chemical cleaners.

Refitting
5 Reassembly is a reversal of removal. Take care not to damage the fins or tubes of the matrix when inserting it into the casing. Refit the heater with reference to Section 11.

    See also:

    Contact breaker points renewal (Every 12 000 miles or 12 months)
    1 Spring back the retaining clips or undo the screws as appropriate and lift off the distributor cap. 2 Withdraw the rotor arm from the distributor shaft. 3 On the Bosch distributor disconnect th ...

    Ignition switch - removal and refitting
    Pre-1986 models Removal 1 Disconnect the battery, undo the screws and remove the steering column lower shroud. 2 Insert the ignition key into the lock and turn it to position I. 3 Using a flat- ...

    Rear suspension lower arm (Saloon and Estate models) - removal and refitting
    Removal 1 Raise the rear of the car and support it on stands (see “Jacking and Vehicle Support”). 2 On cars equipped with the anti-lock braking system, refer to Chapter 9 and remove the load appo ...