1
Thermo G
Maintenance plan
Scheduled heater maintenance
The heater should be inspected in scheduled time inter-
vals, latest at the beginning of the heating period (time of
increased heater usage due to present weather condi-
tions).
In principle the regulations of the vehicle manufacturers
must be adhered. If there no such regulations, Valeo
prescribes the here shown maintenance intervals for
common applications.
If heaters should be used in other vehicles and/or applica-
tions, the maintenance intervals may be shortened or
extended. In such cases please contact your dedicated
Valeo partner for further information.
Check / Maintenance
Important notes
Check result
Measured values,
accomplished repairs
OK.
not
OK
1. Electrical connections
a) Examine electrical plug connections and the wiring harness
for visible damages, replace as required.
2. Heat exchanger
a) Check for external damage, discoloration caused by over-
heating and leaks.
b) Clean the heat exchanger inside, remove soot and debris.
Determine overheating
cause as needed (e.g.
water circulation sys-
tem); check overheat
protection.
3. Fuel system
a) Inspect fuel lines and connections for leakage.
b) Gas pressure regulator:
- quaterly drain oil at the oil drain plug
c) Check solenoid valves for correct function. For that, during
heater operation, disconnect plug connection to the gas pres-
sure regulator. The combustion must stop immediately.
Ensure tight connection
of the gas lines!
Tighten fittings and
hose clamps.
After 4 years operation,
the gas pressure regu-
lator must be replaced.
Address of the operator
Date of the maintenance
Vehicle data
Heater data
Type of heater:
Operating/ control device data
Fuel natural gas (CNG)
Class H
Date of commission
Class L
Ident. no.:
Serial no.:
acc. diagnosis (SST)
