Problems with a bad fan clutch are usually the fan making noise all the time, getting spongy or shaky, plus you might spot silicone fluid escaping from the clutch. By hand, move the fan side to side to find out if the bearing moves too much. After that, push the blades by hand; the fan should swivel easily. Check the fan clutch if you see fluid dripping from its components, see a twisted bi-metal spring, or spot grease coming from the cooling fan's bearing. Begin by turning on your engine and letting it heat up like you normally would. When the engine is up to its regular working temperature, turn off the engine and push the fan manually - you should feel a normal amount of turning force. If that turning is too easy, replace the fan clutch. To test the condenser fan for Durango models, unplug the motor connector and join one motor wire to the battery directly, through a connection with a fuse. The other motor wire requires another fuse to ground it. If the fan motor does not work, change it. When the air conditioner works fine, but the fan doesn't turn on as it should or the engine gets too hot, the fan relay could be damaged, and it's best to leave any control circuit checks to a professional. Check that the fan relay located in the fuse/relay box works correctly. Then test all connections leading to the fan motor. When everything looks normal, the engine coolant temperature sensor or Powertrain Control Module may be causing the issue, which a trained auto repair shop must identify. When replacing cooling fan parts on reverse-direction engines, get sure to only install fans and clutches labeled REVERSE to prevent engine overheating. When restoring the cooling fan/viscous fan clutch assembly, keep it upright as you store it to avoid fluid problems. First, take out a portion of your car's coolant, then remove any air filter housing and top radiator pipe. Hold the water pump pulley still with a special pin spanner wrench, then remove the fan clutch nut by turning it counterclockwise. With care, drop the fan system from the shroud into place, keeping the radiator fins safe, and unfasten both sides of the shroud to pull out the combined fan system. Take off the two fan clutch bolts on the performance bench, then reinstall it the opposite way, making sure you close the fan bolts and tighten the clutch nut tightly. Before you can replace the condenser cooling fan on a Durango, have an expert vent the AC system, disconnect the battery's negative terminal, uncover the radiator support, disconnect the power from both the fan and high-pressure AC switch, and move the wiring out of the way. First, disconnect the air conditioners lines connected to the condenser. To avoid contamination, cover them with tapes or plugs. Remove the four bolts holding the condenser/radiator bracket above it. Next, loosen one hex bolt holding the condenser and pull it out. Refrain from moving the radiator forward until needing more space below it. Once both are free, lift up the entire condenser/fan assembly out of the engine bay. Pull out the fan and shroud from the condenser, keeping track of each screw so you can put everything back correctly. Professional technicians need to pump your engine's air conditioners, fix any leaks they find, and fill it again.