Glow Plug; Exhaust Temperature Sensor; Figure 7: Glow Plug; Figure 8: Exhaust Temperature Sensor - Webasto Air Top Evo 40 Series Service Manual

2.4

Glow Plug

The mixture of fuel and air is ignited by the glow plug when the heater is started. The glow plug designed as an electrical
resistor is positioned in the burner assembly (evaporator mount with combustion pipe) on the side facing the flame.

Figure 7: Glow Plug

2.5

Exhaust Temperature Sensor

The exhaust temperature sensor is a low-resistance PTC resistor which changes its resistance in dependence on the
temperature change of the exhaust gases. This change in resistance is also used for flame monitoring.

Figure 8: Exhaust Temperature Sensor

Air Top Evo 40 / Air Top Evo 55 Service Manual
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