Checking The Overheat Protection Thermostat

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS CORPORATION

• Ignition off.

  Measure between the overheat protection thermostat terminals using an ohmmeter. The resistance must be approximately 0 Ω.

  The overheat protection thermostat must be replaced if the value is not correct.

  Other information: 

  • To access or replace the overheat protection thermostat, see OVERHEAT PROTECTION THERMOSTAT / FLAME SENSOR / ENGINE COOLANT TEMPERATURE SENSOR, REPLACING .
  Fig 2: Identifying Overheat Protection Thermostat

  Courtesy of VOLVO CARS CORPORATION
  Fig 3: Identifying Ohm Meter

  Courtesy of VOLVO CARS CORPORATION

Was a fault detected? 

• YES 

  Refer to VERIFICATION 

• NO 

  Refer to CHECKING COMPONENTS AND WIRING