Heating Air Fan Component - Webasto Air Top Evo 40 Workshop Manual

Functional Checks

6.4.3 Heating air fan component

See Fig. 903, Item 1
Heating air fan
Heating air fan mechanical-
ly damaged?
no
2
6.4.4 Glow plug component
See Fig. 907, Item 8
The resistance test must be carried out with an ohmmeter
suitable for small resistance values.
A resistance test with a simple digital multimeter is too inac-
curate to find the precise values. A new glow plug can be
measured to act as a reference.
The glow plug should have the following values in the test:
Glow plug: 12 V
(no marking)
Resistance at
25 °C: 0.190 - 0.250 ohms
Test current: < 5 mA
606
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yes
2
NOTE
24 V
(green marking)
0.740 - 0.940 ohms
< 5 mA
Air Top Evo 40 / Air Top Evo 55
Procedure Test or meas-
uring equip-
ment
Visual inspection
– Deformation
– Magnets
present
– Locking lug
broken
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Visual