Volvo Workshop Service and Repair Manuals

Coolant Temperature Sensor / Switch HVAC: Service and Repair

Engine coolant temperature (ECT) sensor (A/C)

Removing the engine coolant temperature (ECT) sensor

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Remove the soundproofing panel according to  Passenger side soundproofing See: Body and Frame/Sound Proofing / Insulation/Service and
Repair/Passenger Side Soundproofing 

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Disconnect the 4-pin connector

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Carefully remove the sensor from the sleeve.

Installing the engine coolant temperature (ECT) sensor

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Check that the retaining clip is positioned correctly in the heater unit

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Install the sensor carefully in the casing. Check that it is installed correctly

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Connect the connector

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Check the function

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Install the soundproofing panel according to  Passenger side soundproofing See: Body and Frame/Sound Proofing / Insulation/Service and
Repair/Passenger Side Soundproofing.