SEAT Workshop Service and Repair Manuals > Leon Mk2 > Heating, ventilation, air conditioning system | Supplementary heating | Aux. heater/heater booster | Auxiliary heater -B5W- S / -D5W- S, vehicles 06.2000??

Checking overheating sensorG189

Checking overheating sensor -G189-

Before beginning repair work, perform the following jobs:

–	Remove heater unit → Chapter.

–	Remove heater control unit -J162- → Chapter.

–	Pull connector housing off control unit.

–	Measure resistance between chamber 5 and chamber 6 at red cables.

R = resistance in KΩ

t = temperature in °C

–	Please measure resistance at prevailing temperature.

Evaluation:

t	Defective > 2M Ω = open circuit

t	Defective < 50 Ω = short circuit

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