Webasto thermo top evo

14 | Basic Troubleshooting
42
14.2 General Failure Symptoms
The following table lists possible failure symptoms.
Heater switches
off automatically
(fault lockout)
No combustion after start or auto-
matic repeat start
Switch off heater momentarily and switch on again
Flame extinguishes during opera-
tion

Check coolant lines for obstructions, closed
valves, and kinks.
 Check coolant level, bleed coolant circuit if ne-
cessary. Allow heater to cool down. Check for
failure codes and repeat as necessary.
Heater overheats

Charge/replace batteries
 Switch off heater momentarily and switch on
again
Heater expels
black smoke from
the exhaust
Combustion air and/or exhaust tube
blocked
Check combustion air intake and/or exhaust tube
The heater can be registered by visiting www.tech-
webasto.com or by scanning the code.
A proof of purchase is required for all heaters that
are not registered.
Failure Symptom Possible Cause Remedy