Fig. 814 Burner Head And Exhaust Gas Temperature Sensor; Fig. 815 Checking Mica Insulator On Sensor - Webasto Thermo Pro 90 Series Service Installations

8 Repairing and replacing components
ATTENTION
• Take particular care when handling the exhaust gas
temperature sensor - as it is a sensitive electronic/ceramic
component!
Avoid pulling the cable of the exhaust gas temperature
sensor at the sensor head during installation and while
the heater is in operation.
Avoid sharp kinks in the cable at the sensor head to
prevent damage to the Teflon cable insulation.
Do not pull the cable after fitting the exhaust gas
temperature sensor!
Replace the sensor if it is dropped while carrying out
maintenance work.
When fitting the sensor, make sure the mica insulator on
the sensor is okay, the cable clip of the exhaust gas
temperature sensor is fitted without stress and the cable
from the exhaust gas temperature sensor is installed
loosely to the control unit.
• The cable of the exhaust gas temperature sensor is
designed as a high temperature resistant cable with
Teflon insulation.
The material can withstand permanent temperatures of
up to 185 °C but is sensitive to external mechanical
impact.
Before finally determining the installation location of the
heater we recommend that you assess the possible risk of
damage to the cable as the result of stone impact. If
stone impact cannot be ruled out in the place the heater
is installed, precautions should be taken to protect the
cable of the exhaust gas temperature sensor, e.g. fitting
suitable cover.

Fig. 814 Burner head and exhaust gas temperature sensor

Fig. 815 Checking mica insulator on sensor

807
< 10 N
(single con-
ductor)
< 30°
Thermo Pro 90