Why is the cooling fan not working in my Dodge Durango?

The most common causes are electrical issues (a blown fuse or faulty relay), a bad cooling fan motor, or a faulty coolant temperature sensor or fan control module. Start by checking fuses and relays, then inspect the fan and sensor, and avoid driving if the engine is overheating.

Common causes of a non-working cooling fan

Below are the typical categories and specific failures that can prevent the Durango’s cooling fan from operating correctly.

• Blown fuse or faulty radiator fan relay


• Damaged or corroded fan wiring or connectors


• Failing radiator cooling fan motor


• Faulty fan control module (FCM) or engine control module (PCM) signaling issues


• Malfunctioning coolant temperature sensor or dedicated fan temperature switch


• Low coolant level or a thermostat stuck closed, leading to overheating


• A/C system issues that affect fan operation (e.g., refrigerant problems or a shared relay/wiring fault)

Understanding these categories helps narrow down whether the problem is electrical, sensor-driven, or coolant-system related. If you’re unsure, start with the simplest checks and seek professional help for electrical diagnostics.

Diagnostics and fixes

Before you begin, ensure the engine is cool and you have basic tools handy. This section outlines practical steps to identify the faulty component and guide you toward a fix.

1. Check the radiator fan fuse(s) in the central fuse box and any related sub-fuse boxes to see if they’re blown.


2. Inspect the radiator fan relay(s) and, if possible, swap a known-good relay to test whether the fan operates.


3. Examine fan connectors and wiring for corrosion, fraying, or loose grounds; unplug and reseat connectors, cleaning any corrosion if found.


4. Test the fan motor by applying 12V directly to the fan harness (with the engine off and disconnected from the vehicle’s electronics) to verify whether the fan spins.


5. With the engine hot (or when A/C is on), check whether the fan should come on and whether it actually powers up; if not, the issue is likely with the sensor/control circuit or the fan module.


6. Check the coolant level and inspect for thermostat or water-pump issues; a stuck thermostat can cause overheating even if the fan is working.


7. Scan for trouble codes using an OBD-II scanner to identify sensor or PCM/FCM faults related to cooling fans or temperature readings.


8. If you identify a faulty component (fuse, relay, motor, sensor, or control module), replace it and re-test the system to confirm the fix.

Following these steps will cover the majority of Durango cooling fan failures. If the fan still does not operate after these checks, a professional diagnosis may be required to test more complex electrical control modules or wiring harness integrity.

Additional considerations

Be aware that some Durango models have dual cooling fans and distinct control schemes for engine cooling and the A/C condenser. The A/C system can trigger the fans independently of engine temperature, so a fan that runs only when the A/C is engaged may indicate a normal function rather than a fault. Conversely, if the fans do not engage at high engine temperatures or when the A/C is on, that points to a sensor, relay, or control module issue.

Model-year variations and notes

Durango generations differ in cooling system design. Modern Durangos often use electric cooling fans controlled by the PCM or a dedicated Fan Control Module, with fans that operate at low and high speeds and respond to both engine temperature and A/C signaling. Older or base models may have simpler wiring and fewer fan speed options. If you’re troubleshooting, knowing whether your Durango has dual fans, a single fan, or a combined cooling-A/C setup helps pinpoint the likely failure mode and the correct replacement parts.

Summary

A non-working cooling fan in a Dodge Durango is most commonly caused by electrical issues (fuses/relays), a failed fan motor, or a faulty coolant temperature sensor or fan control module. Start with simple checks—fuses, relays, and wiring—then test the fan motor and sensor signals, and verify coolant level and thermostat function. Use an OBD-II scan to uncover related fault codes, and consult a professional if tests reveal a control-module problem or if you’re uncomfortable handling electrical diagnostics. Addressing these issues promptly helps prevent engine overheating and potential damage.

Why is my cooling fan not kicking in?

If the radiator cooling fan doesn't turn on, first check the fan fuse and relay for continuity. Inspect the coolant temperature sensor, as a faulty sensor may not signal the fan to activate. Also, test the fan motor directly by applying 12V power to ensure it runs. Clean any debris blocking the fan blades.

What is the most common problem with Dodge Durangos?

Transmission Problems
Transmission issues are common in 2021-2025 Dodge Durango models. Many owners report hard shifting, transmission slipping, and overheating.

Why did my fan suddenly stop working?

A fan may stop working suddenly due to a power supply issue like a tripped circuit breaker or a bad outlet, or it could be a mechanical or electrical problem within the fan itself, such as a burnt-out capacitor, worn-out motor, or loose wiring. Obstructions like dust or debris can also prevent the fan from moving smoothly. 
Power supply problems

• Tripped circuit breaker: The fan's circuit may have been overloaded. Check your home's electrical panel and reset any tripped breakers. 
• Wall switch or plug: Ensure the wall switch is in the "on" position or that the fan's plug is securely in the outlet. Try plugging another device into the same outlet to test if it's working. 
• Blown fuse: Some fans have an internal fuse that can blow due to a power surge. You may need a multimeter to test if the fuse is blown. 

Mechanical and electrical issues

• Dust and obstructions: Over time, dust can accumulate on the blades and in the motor, causing resistance. Clean the fan blades and housing, and check for any loose screws or other blockages. 
• Faulty capacitor: A burnt or failing capacitor can prevent the motor from starting up properly. 
• Worn-out motor: The motor can wear out over time and eventually stop working completely. You may notice signs like slow or intermittent operation before it fails. 
• Loose wiring: Wires inside the fan or in the ceiling box can become loose, interrupting the electrical connection. This can cause the fan to stop working suddenly, or to work intermittently. 

Other issues

• Remote control problems: If you have a remote-controlled fan, the batteries may be dead or the remote may have lost its pairing with the fan. Try replacing the batteries or re-syncing the remote. 
• Stuck pull chain: The pull chain can become stuck or broken. Gently try to move it to see if it feels stuck or if the fan responds. 

You can watch this video to learn how to troubleshoot a fan that doesn't turn on: 56sRealHouseDIYYouTube · Jul 11, 2025
This video demonstrates how to identify if a capacitor is faulty, a common reason for a fan to stop working: 55sDuctTape MechanicYouTube · Aug 29, 2021
You can watch this video to learn how to test a fuse: 54sElectro UniversityYouTube · Nov 22, 2022

Why is the fan not working in my Durango?

A Dodge Durango's fan not working can be caused by a blown fuse, a faulty blower motor resistor, or a problem with the motor itself, such as melted wiring at the resistor. To troubleshoot, first check the relevant fuses and relays, then inspect the blower motor resistor and its wiring harness, and finally test the blower motor. If it's a cooling fan, also check the fan relay, temperature sensor, and wiring connections. 
For the HVAC (heating and AC) fan 
This video demonstrates how to test and replace a Dodge Durango blower motor resistor: 54srichpin06aYouTube · Sep 26, 2014

• Check the fuse and relay: Start by checking the blower motor fuse and relay for continuity. A blown fuse is a common culprit, and a failing relay can also prevent the fan from working. 
• Inspect the blower motor resistor: This is a very common failure point on Dodge Durangos. 
  • Look for melted wiring or a damaged connector at the resistor, which is often located near the blower motor. 
  • Wiggling the wiring at the resistor can sometimes make the fan temporarily turn on, indicating a bad connection or melted wires. 
• Test the blower motor: If the fuse is good and the resistor looks okay, the motor itself may be faulty. 
  • Test the motor for operation by applying direct power to it. If it doesn't run, it needs replacement. 
• Examine the climate control module: In some cases, a malfunctioning climate control module can cause issues with fan operation. 

For the engine's cooling fan
This video demonstrates how to diagnose a Dodge Durango cooling fan problem: 58sSuperBee79YouTube · Jul 27, 2025

• Inspect the fuse and relay: Check the cooling fan's fuse and relay. A blown fuse or faulty relay is a common cause. 
• Test the fan motor directly: Apply 12V of direct power to the fan motor to see if it runs. If it doesn't, the motor is likely bad. 
• Check the fan's wiring harness: Look for any signs of damage, loose connections, or corrosion, especially at connectors behind the headlights. 
• Verify the temperature sensor and AC pressure switch: These sensors trigger the fan. If their signals are inaccurate or if the wiring is faulty, the fan may not activate correctly. 
• Inspect the fan clutch: For models with a fan clutch, a failing clutch can prevent the fan from engaging properly. 

General advice

• Safety first: If the cooling fan isn't working, do not drive for long distances, especially in hot weather, to avoid engine overheating and potential damage. 
• Look for specific model issues: Some model years of the Durango are known for specific problems, like melted wiring at the HVAC resistor. Researching your specific model year can be helpful. 
• Consult a professional: If you are not comfortable with electrical diagnostics, it is best to consult a professional mechanic to properly diagnose and fix the problem.