Porsche Cayenne Turbo Driver Manual page 81

Parking heater faults
Initial start-up following period of non-utilisa-
tion
If you have not used the parking heater for several
weeks, the system may require the heater to be
switched on several times before it actually "starts
up".
f Please wait between the individual
switch-on attempts for
approx. 5 minutes in each case.
Requirement for initial start-up of the
parking heater
– Cold engine.
In the following instances, have the parking heater
inspected by a qualified specialist workshop:
– If the parking heater fails to "start up" after the
3rd switch-on attempt.
– If the parking heater has a fault, no function
symbol appears on the display, only the
remaining running time is displayed. The
display flashes on and off briefly and then goes
completely dark.
– In the event of a severe accident, the parking
heater is automatically switched off as a safety
precaution.
The parking heater is not ready for operation.
– If the temperature is too high, the overheating
protection automatically switches the parking
heater off. The parking heater is not ready for
operation.
– If the voltage level is too low, the parking
heater is automatically switched off. The
parking heater is temporarily unavailable.
We recommend that you use a Porsche partner
for this work since these are staffed with trained
personnel and have the necessary parts and
tools.
Air Conditioning, Parking Heater and Rear Window Heating
81