Malfunction and Remedies
Park heating (optional)
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8.17 Park heating (optional)
If a fault occurs, check that the fuses and plug connectors are intact and tightly
seated.
If this check does not correct the fault, please contact a Webasto service centre
(www.webasto.com) with the model of your park heater (Thermo Pro 90D 24V).
Heating switches off automatically = fault shutdown
Cause Remedy
No ignition after start and repeat start.
Flame is extinguished during operation.
Switch heater off and on again. If it still
does not heat, contact a Webasto service
centre.
Power failure longer than 20 seconds. Check fuses, plug connector and battery
charge.
Heater overheats due to low coolant or
loss of coolant.
Add coolant.
Shutdown due to temperature limiter
(overheating).
Allow device to cool, then press tempera-
ture limiter button (1) to switch on again.
1
Fault code output
The timer display shows an error message as soon as a fault occurs.
Fault code output on timer display
T84 Undervoltage
Te4 Status LED fault (contact customer service)
Te5 Temperature sensor fault (temperature sensor fault in MultiCon-
trol/SmartControl)
Teb Clock fault (the internal clock chip of the MultiControl/SmartControl has
lost its time)
Tec Control button jammed (a control button is pressed down longer than
10 seconds)
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