2019 Ram ProMaster 1500 Radiator Fan Isn't Working

Radiator fan not working in 2019 Ram ProMaster 1500: causes and solutions

Find Repair Location
Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
34% chance it's the
Fan Motor or Clutch
0%
28% chance it's the
Fan Relay or Fuse
0%
23% chance it's the
Temp Sensor or Fan Control Module
0%
15% chance it's
Something else
The most common reasons a 2019 Ram ProMaster 1500 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.
  • Fan Relay or Fuse: A faulty fan relay or blown fuse can prevent the cooling fan from operating, leading to engine overheating.
  • Temp Sensor or Fan Control Module: A faulty temperature sensor or fan control module can result in incorrect readings, causing the engine to overheat or the cooling fan to operate improperly.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2019 Ram ProMaster 1500 radiator fan isn't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

Over time serpentine belts stretch, crack, and the ribs that ride on the accessory pulleys being to wear smooth. A squealing noise that increases with engine speed or as engine driven accessories are turned on may be noted. The noise is caused by the belt slipping on the pulleys, insufficiently driving them. Ineffective air conditioning, a battery warning light, or intermittent power steering assist can result from this.

»MORE: Symptoms of a bad serpentine belt

The bad thermostat can cause two different sets of problems, depending on whether it's stuck open or stuck closed.

A thermostat that is stuck open can cause the engine to run colder than normal and turn on the check engine light. It may also cause poor fuel mileage and the heater to blow cool air.

A thermostat that is stuck closed will cause the vehicle to overheat. If a new thermostat doesn't resolve engine temperature problems, the cooling system needs to be checked for other issues.

» LEARN MORE: Signs of a bad thermostat, and how to fix it

When the engine coolant temperature sensor fails, it will send inaccurate information to the vehicle’s computer, causing the computer to react to false operating conditions. This will cause the engine to consume more fuel than normal, depleting fuel mileage, and causing black, sooty smoke from the engine under moderate to heavy acceleration. The check engine light will illuminate, and on-board diagnostic trouble codes may be stored for exhaust and emission system failure, fuel delivery system failure, and engine cooling system failure. Overheating may also occur, as the coolant sensor may be leaking fluid out of the engine, creating a an air pocket in the system.

When the radiator fans stop functioning properly, the engine temperature will rise. The spike in temperature will be highest when the vehicle is idling at a stop, but should subside once the vehicle begins moving again.

Additionally, the air conditioner typically won't blow as cold. This is because the air from the radiator fans also blows across the air conditioning condenser, so when the fans fail, both systems suffer.

You'll also usually see the check engine light and notice a drop in fuel economy. It's possible the fan will start making noise if it's failing, as well.

What are the steps to diagnose the non-functioning radiator fan in a 2019 Ram ProMaster 1500?

To effectively diagnose a non-functioning radiator fan in your 2019 Ram ProMaster 1500, begin with the simplest checks to avoid unnecessary complications. Start by examining the fuse associated with the radiator fan; a blown fuse is a common and easily fixable issue that can halt fan operation. If the fuse is intact, proceed to inspect the relay, as a malfunctioning relay can disrupt the electrical flow to the fan. Next, test the fan motor directly by applying power to it; if it fails to spin, replacement may be necessary. Additionally, check the wiring for any signs of damage or loose connections, as these can also impede functionality. Utilizing a diagnostic scanner to check for error codes can provide insights into specific problems within the fan system. Lastly, ensure that your coolant levels are sufficient, as low coolant can lead to overheating and affect the fan's performance. By following this structured approach, you can systematically identify and resolve the issue with your radiator fan.

What are the common causes for the radiator fan not working in a 2019 Ram ProMaster 1500?

When dealing with a non-functioning radiator fan in a 2019 Ram ProMaster 1500, it's essential to consider several common problems that could be at play. One of the first things to check is the fan motor itself, as a faulty motor is a frequent culprit behind fan failure. If the motor is operational, inspect the fuses, as a blown fuse can easily interrupt the power supply to the fan. Additionally, the relay that controls the fan may be defective, so testing or replacing it could restore functionality. Another critical component to examine is the coolant temperature sensor; if this sensor is malfunctioning, it may not signal the fan to engage when necessary. Lastly, ensure that the wiring connecting the fan to the vehicle's electrical system is intact, as damaged or loose connections can also prevent the fan from working. By systematically checking these areas, you can effectively diagnose and potentially resolve the issue with your radiator fan.

How urgent is it to repair the non-functioning radiator fan on a 2019 Ram ProMaster 1500?

Repairing a non-functioning radiator fan on a 2019 Ram ProMaster 1500 is an urgent matter that should not be overlooked. The radiator fan is essential for maintaining optimal engine temperature by effectively dissipating heat generated during vehicle operation. When this fan fails, the risk of engine overheating significantly increases, which can lead to severe damage such as warped cylinder heads or blown head gaskets. These issues not only compromise the engine's integrity but can also result in costly repairs that could have been avoided with timely intervention. Additionally, a malfunctioning fan can adversely affect other components like the water pump and thermostat, creating a cascade of mechanical failures. Therefore, addressing the radiator fan issue promptly is crucial for ensuring the vehicle's reliability and longevity, making it imperative for DIY enthusiasts to prioritize this repair to avoid more extensive and expensive damage down the line.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.