Heater, Removing And Installing

The heater construction is largely the same as the heater and A/C unit construction. The refrigerant lines to the expansion valve are not present. The open connections on the expansion valve are sealed off with a closure cap.

Depending on the heater version, there may be no expansion valve installed. In this case, there is a foam piece installed in place of the expansion valve.

The condensation water drain does not have a function due to the missing A/C system. Even though the condensation water drain does not have a function, it still must be installed properly. If it is not installed correctly, moisture can get into the vehicle interior or there may be noises when operating the heater.

Depending on the vehicle version, a condensation water drain may not be installed. In this case, the openings in the underbody and the connection on the heater are sealed off with a plug.