Checking Temperature Sensor With Line

Preglow time until preglow indicator lamp goes out is excessive or too short. (see table). Pull plug off preglow time relay and measure resistance against ground using multimeter ohm measuring range.

Set value at:
+25 °C 2442 ohms ±17O ohms
+80°C 291 ohms ±16 ohms

- If set value is not attained:

Replace temperature sensor.

- If infinite resistance is indicated:

Eliminate open circuit in electrical wire.

- If resistance < 1 ohm is indicated:

Eliminate short circuit in electrical line.