volvo Workshop Repair Guides

Volvo Workshop Service and Repair Manuals

Evaporator Core > < Programmer, Climate Control|Page 2489
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Coolant Temperature Sensor / Switch HVAC: Testing and Inspection

Thermal Switch

1.

Disconnect wire from temperature switch.

2.

With the engine cold (below 75° F) connect an ohmmeter between the switch and ground.  Circuit should be open.

3.

Start the engine and warm up to 86-104° F.  Circuit should close.

If the temperature switch fails either test, replace and recheck.

Evaporator Core > < Programmer, Climate Control|Page 2489