Webasto Thermo 350 Service Manual download pdf (Page 34)

5 Troubleshooting Thermo 230 / 231 / 300 / 301 / 350

508

5.3.2.8 Fault Symptom "Temperature Limiter

Defective"

Is electrical power supply

to components o.k.?

YES

NO

Has temperature limiter responded?

(Reset according to type of temperature limiter)

Determine why temperature limiter has responded,

e.g.:

• check shut-off elements,

• check water circulation in system is free from

bubbles,

• check circulation pump sense of rotation,

• check coolant low temperature resistance.

Can no fault be detected?

Make electrical connections.

Control unit defective, replace.

Replace temperature limiter.

If symptom shows again after testing:

control unit defective, replace.

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