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What causes the Citroen C-Quatre fan to keep running?

2 Answers

Brooke

08/31/25 7:08am

Citroen C-Quatre fan keeps running due to thermostat failure, replacing the thermostat can solve the problem. Meaning: The car thermostat refers to the valve that controls the flow path of engine coolant. Function: The thermostat automatically adjusts the amount of water entering the radiator based on the coolant temperature to ensure the engine operates within an appropriate temperature range, which can save energy consumption. Impact: The thermostat must maintain good working condition, otherwise it will seriously affect the normal operation of the engine. If the main valve of the thermostat opens too late or fails to open, it will cause the engine to overheat. If it opens too early, it will prolong the engine warm-up time and cause the engine temperature to be too low.

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MicahLynn

09/13/25 3:28am

Constant fan operation is quite common on Citroen C-Elysée models, often caused by a faulty coolant temperature sensor misleading the system into thinking the engine is overheating. A stuck thermostat failing to open can also trigger continuous fan operation for cooling purposes. Relay welding is another frequent culprit, especially when the fan control circuit ages and causes persistent electrical contact. While air conditioning system demands can activate the fan, continued operation after AC shutdown indicates an issue. First check coolant levels, then use onboard diagnostics to retrieve trouble codes for precise component identification. Neglecting this not only drains the battery but risks engine damage - professional inspection at authorized workshops is recommended for safety assurance.

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