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7.
Move the heat exchanger box by holding it on the strap up and down so that the heat exchanger box is
unlocked out of the tongue-and-groove joint. Pull the heat exchanger box out of the device.
8.
Loosen the 2 locking screws of the control system casing by approx. 4 - 6 mm by turning them counter
clockwise and remove the cable for potential equalisation from the flat plug of the control system
casing.
34
Replacement of the defroster heating (preheater)
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