What Causes Low Water Temperature in Cummins Engines

[LeAmelia]

Cummins engine low water temperature is generally caused by a damaged thermostat or a constantly running cooling fan. When the vehicle's water temperature is low, it is necessary to check the coolant level and whether it has deteriorated; inspect the engine oil level; check for any foreign objects blocking the water radiator; examine if the fan blades are deformed; verify the proper functioning of the water temperature sensor and its circuit; and perform a disassembly inspection of the thermostat. If the thermostat fails and the valve cannot close, the coolant will continuously circulate in the large loop, potentially causing the engine's water temperature to be too low. Alternatively, some vehicles may have their thermostat removed during summer to reduce high temperatures, which can also result in very low engine water temperature.