In an engine that is overheating and the sensor, thermostat, and engine flush do not resolve the issue, it is possible that the problem may lie with a fuse or relay switch for the fan.
Fuse: Check the fuse box for a blown fuse related to the fan circuit. A blown fuse can prevent the fan from receiving power and causing the engine to overheat.
Relay Switch: There may be a relay switch that controls the fan's operation. If this relay is faulty, it may not be able to provide power to the fan when it is needed, resulting in overheating.
To determine if the fuse or relay switch is causing the problem, you can use a multimeter to check for continuity and power. If the fuse or relay switch is found to be faulty, it should be replaced with a new one.
Other possible causes of overheating that should be considered are:
- Water pump failure: The water pump is responsible for circulating coolant through the engine. If it fails, coolant cannot circulate properly and the engine will overheat.
- Radiator problems: A clogged or damaged radiator can restrict coolant flow and cause the engine to overheat.
- Head gasket failure: A blown head gasket can allow coolant to leak into the combustion chambers, causing the engine to overheat.
If the cause of the overheating cannot be easily identified, it is recommended to have the vehicle diagnosed by a qualified mechanic who can accurately diagnose and resolve the issue.
