Rear demist

Fig 1: Identifying Rear Demist

Courtesy of VOLVO CARS OF NORTH AMERICA.

There are heating loops in the glass for demisting and to prevent ice from forming. The loops heat up when they are supplied with power. The power supply is via a directly connected relay in the rear electronic module (REM).

Rear demist is controlled using a switch on the right-hand side of the climate control module (CCM).

The engine must be running for the demister to work. Press the button again to switch off the function. Demisting is switched off automatically after the maximum time of 12 minutes.

There are diagnostics for the switch via the climate control module (CCM).