Pull off plug (S2| on control unit.

Connect ohmmeter between plug term. 4 (yellow) and 12 (blue). Ohmmeter range: x 100.

The ohmmeter should display any random resistance value.

Move the temperature control lever from 18° to 30° to 18°. The displayed resistance value must change (approx. 1000 ohms).

No resistance value change: see section B4.

Ohmmeter displaying«« ohms: break in the sensor system.

Testing Procedures:

Note: Breaks could be on the wire connections, on plug connections (4), (5), (B2), on inside sensor or outside sensor as well as on the control switch.

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