Skoda Workshop Service and Repair Manuals

Removing and installing heater unit Removing –  Removing dust and pollen filter with housing → Chapter. –  Determine the code for radio sets fitted with anti-theft coding. –  Disconnect battery. –  Reduce pressure in the coolant circuit by opening the cap on the coolant expansion reservoir.

–  Disconnect both coolant hoses to heat exchanger of the heater with hose clamps (e. g. - V.A.G 3094-).   Note t  Connect the coolant hoses the right way round: - Coolant hose -A- Feed from the cylinder head, coolant hose -B- Return flow to the water pump. t  Bleed the refrigerant circuit → Engine, Mechanics; Rep. Gr.19.

–  Position the reservoir under the connection for the hose -B- and via the connection for the hose -A- carefully blow the coolant out of the heat exchanger (with compressed air).

–  Slightly raise the pre-type punched points -A- of the heat protection matting and remove the hexagon nuts with washer -B- located behind them (tightening torque 15 Nm). –  Remove hexagon nut with washer -C-.   Note A gasket must be present at the washers of the hexagon nuts for sealing. –  Removing the dash panel → Body Work; Rep. Gr.70 –  Remove right footwell vent → Chapter. –  Removing passenger-side airbag unit → Electrical System; Rep. Gr.96. –  All opened connectors and the air guides of the heater unit must be covered to prevent any swarf from penetrating.

–  Bore out the support for the dash panel at the points marked (connection points) with -A- using a 7 mm drill Ø. –  Bend part -B- to the side at the predetermined breaking point -C- in -direction of arrow-.   Note After installing the heater unit, bend the part -B- back in its original position and screw the molded part drawn with interrupted lines to the bores -A- (e. g. with screws M6x10). –  Disconnect electrical connection between vehicle and heater unit (plug connection and bolted earth cable to -A- pillar.

–  Remove heater unit in -direction of the arrow-. Install Installation is performed in the reverse order, pay attention to the following points:   Note t  Check all the gaskets at the heater unit for damage before installing, replace damaged gaskets. t  Before inserting the heater unit, check the gasket at the suction channel as it must touch the body.

t  Replace gasket -A- at the heat exchanger and check for correct fitting at the contact surface -C-. t  At the connection to the heat exchanger, the flow direction of the coolant is indicated (-arrow B-). t  All the cable binders which must be removed for removing the heater unit must be fitted again at the same point after the assembly.