Temp warning system Volvo 240 (F(J) (-1984)

A temperature warning lamp that glows faintly, flashes or fails to light at ignition should not be read straight away as an overheated motor – often the fault is in the warning circuit itself. On early 240 up to 1984 (F(J) version) the function sits in the instrument panel, and a tired bulb, poor contact in the bulb socket or an aged diode are common check points before the sensor is suspected.