Rest Heater Ss-Heat - Volvo FM Handbook

Cab 341
Then try to start the heater again. If it stops again, or
will not start at all, contact a Volvo workshop. (If the
heater has stopped or will not start at all because of
low fuel level or underpressure in the fuel tank, it may
take up to 6 starting attempts before the heater will
start.)
Heater maintenance
In order for the heater to be reliable, the parking heater
must be run at regular intervals, even in warm
temperatures. A symbol and a message are shown in
the display when it is time to run it. The parking heater
must then be run for at least 20 minutes. Set the heater
to maximum. Open the windows and doors if the
temperature in the cab gets too high.

Rest heater SS-HEAT

The rest heater is a pump that continues to circulate
hot water from the engine during short rest periods, as
long as the engine is hot.
Start the rest heater
1Open the panel vents