The radiator fan is most often not working on a 2015 Versa due to an electrical fault (like a blown fuse or faulty relay), a failing fan motor, or a problem with the cooling-system sensor or wiring. Other common causes include low coolant level or a stuck thermostat that prevents proper cooling.
In more detail, the Versa’s radiator fan is an electric unit controlled by the engine computer, engaging to cool the engine when it reaches operating temperature or when the air conditioning is active. If the fan fails to run, the engine can overheat, particularly in stop-and-go traffic or hot weather. Diagnosing the issue typically starts with checking fuses and relays, then inspecting the fan motor and its wiring, and finally evaluating cooling-system components such as coolant level, thermostat, and the coolant temperature sensor.
Common reasons the radiator fan stops on a 2015 Versa
The following are the most frequent culprits when the radiator fan won’t operate. Inspect each area or have a mechanic test them to determine which one is at fault.
- Blown fuse or faulty radiator fan relay
- Bad radiator cooling fan motor
- Faulty coolant temperature sensor (ECT) or problems in the PCM/engine control logic
- Low coolant level or air trapped in the cooling system
- Thermostat stuck closed or failing water pump, causing improper coolant flow
- Wiring harness corrosion or a damaged under-hood fuse box
In most cases, addressing the electrical components (fuse/relay and wiring) or replacing a faulty fan motor resolves the issue. If the cooling-system components are at fault, those repairs restore proper operation and prevent overheating.
How to diagnose the radiator fan problem
Below are practical steps to identify the root cause, starting with quick checks you can perform and progressing to more involved diagnostics. If you’re not comfortable with electrical work, a qualified technician can perform these steps.
- Check for warning lights and temperature gauges on the dashboard to confirm overheating or abnormal readings.
- Inspect the under-hood fuse box and relay panel for a blown fuse or a faulty radiator fan relay. Replace if necessary.
- Visually inspect the fan wiring and connectors for corrosion, damaged insulation, or loose grounds.
- With the engine cool, check the coolant level in the reservoir and radiator; top up if needed and bleed any air from the system if your model requires it.
- Start the car and, with the A/C on, see if the radiator fan engages. If it does, the issue may be related to temperature sensor input or the fan control circuit when the engine is hot.
- If you have a multimeter or a service manual, test for voltage at the fan connector when the engine is hot or the A/C is on. If voltage is present but the fan doesn’t spin, the fan motor is likely faulty; if no voltage, the problem is upstream (relay, control module, or wiring).
- Check the coolant temperature sensor readings with an OBD-II scanner; abnormal codes (or a P0115–P0119 range for ECT) can indicate sensor or wiring issues affecting fan operation.
- If the fan spins when power is applied directly from the battery (bypassing the relay and control circuit), the fan motor is good and the fault lies in the control circuit or sensors. If it doesn’t spin, the motor should be replaced.
Diagnosing in this order helps distinguish between electrical faults, sensor faults, and mechanical cooling issues, reducing the chances of unnecessary replacements.
Remedies and when to seek professional help
Once you’ve identified the likely cause, these repairs are commonly effective. If you’re unsure about any step or test, consult a licensed mechanic to avoid property damage or personal injury.
- Replace a blown fuse or faulty radiator fan relay
- Replace the radiator fan motor if testing shows it is defective
- Repair or replace the coolant temperature sensor or fix related wiring
- Repair damaged wiring or connectors; ensure solid ground to the fan
- Top off or flush the cooling system and replace a stuck or failing thermostat
- Check for and repair any coolant leaks, and ensure the water pump is functioning correctly
After performing these repairs, monitor the system to ensure the fan operates as intended across temperature ranges and that the engine no longer overheats. If overheating persists despite a new fan or cures in the electrical system, pursue a broader cooling-system evaluation with a professional.
Other related cooling system checks
In some cases, issues that mimic a radiator fan failure come from other cooling-system components. The following checks can help ensure there isn’t a related problem masking as a fan failure.
Thermostat and coolant level
A thermostat that is stuck closed or a low coolant level can cause overheating even with a healthy fan. Inspect and replace the thermostat if necessary, and ensure the coolant is at the correct level and free of air pockets.
AC system interaction with the radiator/condenser fan
The Versa’s radiator/condenser fan often runs when the AC is engaged. If the AC pressure high-side remains elevated or the condenser is blocked, the fan may activate differently or fail to run as expected. Diagnosis should consider AC performance and refrigerant condition.
Addressing these related components can resolve symptoms that resemble a fan failure and help prevent future overheating events.
Summary
A non-working radiator fan on a 2015 Nissan Versa is most often caused by electrical issues (fuse/relay), a bad fan motor, or sensor/wiring problems in the cooling system. Start with a quick check of fuses, relays, and coolant level, then test the fan’s operation and wiring. If needed, replace faulty components such as the fan motor, sensor, or wiring harness, and consider thermostat or coolant system service if overheating persists. When in doubt, a qualified technician can perform a thorough diagnostic to ensure the cooling system functions reliably.
What is the most common problem with the Nissan Versa?
What Are the Most Common Problems With the Nissan Versa? By far the biggest issue with older Nissan Versa models is transmission failure. This issue only affects vehicles with a continuously variable automatic transmission, not a standard automatic or manual transmission.
Why is the radiator fan not working on my 2015 Nissan Versa Note?
The most common reasons a 2015 Nissan Versa Note radiator fan isn't working are the fan assembly, the fan clutch, or the coolant temperature sensor. Fan Motor or Clutch: A faulty fan motor or a malfunctioning fan clutch can result in inadequate cooling, causing the engine to overheat.
What would cause my radiator fan not to kick on?
Some of the most common causes of a faulty radiator fan include a blown fuse, a faulty temperature sensor or a defective fan relay. If the fan stops working, your engine could overheat and be damaged.
How much does it cost to replace a radiator fan in a Nissan Versa?
between $511 and $599
The average cost for a Nissan Versa Radiator Fan Assembly Replacement is between $511 and $599.