It is possible that the wires and connectors are faulty. If you notice that the fan does not work even when the car is overheating, there might be a wiring issue or a bad connection. If this is the case, you must fix them. You should check the wires from the control unit or relay to the radiator fan.
The most common reasons a Volvo S80 radiator fan isn't working are the fan assembly, the fan clutch, or the coolant temperature sensor. 0 % 45 % of the time it's the Fan Assembly 0 % 45 % of the time it's the Fan Clutch 0 % 10 % of the time it's the Coolant Temperature Sensor Common Repairs Serpentine Belt Replacement
If the clutch assembly isn't working properly, or begins to fail itself, it can cause the fan to stop working. Over time, the clutch assembly will begin to wear and require servicing. Inspecting the clutch assembly for your cooling fan should be a part of routine care for your Volvo.
Below are four signs that cooling fan failure may be imminent in a Volvo: The engine temperature gauge rises into the red zone: If you notice your dashboard engine warning light illuminating, it is most likely because the engine is overheating. Immediately pull over in a safe area and turn the engine off.
Reasons a Volvo XC90 Radiator Fan Isn't Working. The most common reasons a Volvo XC90 radiator fan isn't working are the fan assembly, the fan clutch, or the coolant temperature sensor.
If the fan does work when the engine is hot but does not when A/C is switched on, then could be either low refrigerant charge, bad pressure sensor, or bad compressor/clutch. I'm not sure what you are referring to as the 5 A ECU fuse, but it can't be the fan power source as this is far too low to support the fan.
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volvo cooling fan not working
