Volvo XC90 Owner's Manual page 209

Heater*
The heater helps the engine and passenger
compartment to reach the correct temperature
both before and during driving.
The heater is fuel-driven and is fitted in the front
right-hand wheel housing.
NOTE
When the heater is running, smoke may be
emitted from the right-hand front wheel hous-
ing and a low hum may be heard. This is per-
fectly normal.
The heater has two subfunctions:
•
Parking heater (engine and passenger com-
partment heater) - heats the engine and pas-
senger compartment, if necessary, when the
parking climate control's preconditioning* is
activated.
•
Additional heater - heats the engine and
passenger compartment while driving, if nec-
essary.
Fuel, refuelling and battery
Warning label on fuel filler flap.
The heater uses fuel from the car's normal fuel
tank and is driven by the starter battery.
If the car is parked on a steep hill, the front of the
car should point downhill to ensure that there is a
supply of fuel to the heater.
If the starter battery has insufficient charge or if
the fuel level is too low, the heater will switch off
automatically and a message will be shown in the
driver display.
NOTE
Make sure there is enough fuel in the car's
normal fuel tank if the heater needs to be
used.
CLIMATE CONTROL
WARNING
Fuel which spills out could be ignited. Switch
off the fuel-driven heater before starting to
refuel.
Check in the driver display that the heater is
switched off. The heat symbol is shown when
it is operating.
Related information
•
Parking heater* (p. 208)
•
Additional heater* (p. 209)
•
Parking climate* (p. 200)
* Option/accessory, for more information, see Introduction.
207