Webasto Thermo Top Evo - B Operating Instructions - Maintenance
It is recommended that you have the vehicle maintained and checked at regular intervals by
an authorised Webasto dealer.
All repair or maintenance work must always be carried out by your authorised Webasto deal-
er. The dealer can also help with the specification of the required maintenance.
Warning.
A great deal of repair and maintenance work performed on the heater requires spe-
cialised knowledge and special tools. Incorrect settings and maintenance can lead to
damage to the heater or accidents resulting in serious damage.
• For optimum performance, your authorised Webasto dealer should check and perform the
necessary maintenance work on the heating system at least every 2 years regardless of use.
• The heater must be switched off prior to cleaning.
• The heater may NOT be cleaned with high-pressure cleaning systems or compressed air.
Action in the event of faults
If a fault occurs, check that the fuses and plug connections are in perfect condition and
secure.
When a fault occurs, the heater switches to the fault interlock; no error is indicated on the
heater control.
Always try to cancel the fault interlock before calling a Webasto service centre.
The following faults can be remedied directly by the user:
Fault description
Possible cause
Remedy
Heater switches off
automatically
(= fault lock-out)
No combustion after
starting and restarting.
Flame goes out during
operation.
Switch off heater and switch
on again (not more than
twice).
Heater does not switch on.
Heater is without electric
power.
Check power supply to heater
and ground connections.
Heater switches off during
operation (= fault lock-out).
Heater has overheated
due to lack of coolant.
Refill coolant as directed by
manufacturer.