513
Thermo G
5 Troubleshooting
9. Disconnect the heater from the vehicle electrical
system.
10. Disconnect the test plug.
11. Install burner head (see 8.4).
5.5.9 Ignition electrode inspection
NOTE:
The ignition electrode insulation body may not be
damaged.
Ignition electrodes not functioning properly must be
replaced.
1. Remove burner head (see 8.4)
2. Check distance of the electrode tips to the flame pipe
(see Fig. 504).
3. Check the distance between the electrodes (see Fig.
4. Inspect the ignition electrode insulation body for
damage.
Functionality is verified while inspecting the ZF module.
Fig. 503 Burner head - ZF module
Ignition electrode
Flame pipe
Insulation body
ignition electrode
