Overheat Sensor for Webasto Air Top EVO - 1313158A

Overheating sensor

The overheat limiter measures the temperature of the heater in the heat exchanger fin zone and protects the heater from unacceptable overheating during operation. It blocks the operation of the heater when the temperature of the heated air is more than 150 ° C and the surface temperature of the heater (body) is above 80 ° C, which results in interruption of the fuel supply and switching off the heater, putting it into the purge mode. An error code is issued to the control body. To start the heater it is necessary to turn it off and on.

Overheating sensor diagnostics.

When checking the resistance of the overheating sensor with a multimeter, the obtained values ​​should be compared with this graph.

Characteristics of the temperature sensor RT 2000 lie in the range from 10 oC to 30 oC.

Overheating sensor replacement.

Dismantling.

1 Remove the heater.

2 Disassemble the housing.

3 Disconnect plug X3 from control unit.

4 Remove the overheating sensor from the heater body with a suitable tool.

ATTENTION! Do not pull the wiring

Installation.

1. Measure the resistance of the overheating sensor.

2. Install overheating sensor.

3. Ensure that the sensor is installed correctly by the sensor element to the heat exchanger.

4. Connect plug X3 to the control unit.

5. Assemble the hull.

6. Install the heater.