Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to test a fan clutch [title] Pay attention to changes in air temperature. [step] One of the most common symptoms of a fan clutch on the outs is an inability to properly cool the air circulating through the vehicle. Switch on the a/c and turn it down to the coldest setting.

Ending1: Too much heat may crease the wires of the clutch. [substeps] Other common behavioral changes that may happen while the clutch is off include heat exhaustion, odor, mechanical problems or even a hardening of the interior of the clutch mechanisms. Ending2: [substeps] You may notice that air feels condensing around the drive shaft or cold settling in between the clutch shaft and the stick. Bring the vents down and let the air circulate in comfortably by turning the air pressure down to a milder setting. Ending3: If it fails to cool down after several minutes, or seems to be emitting unusually warm air, there could be a problem. [substeps] Hold your hand a few inches away from the vent so slight variations in temperature will be more noticeable. Ending4: This process can be performed while you're idling or at the gas station or pumping gas from your steering wheel. If the temperature is above 65 ° f (21 ° c), your clutch may not be adequately cooled.

Answer format: ending1/ending2/ending3/ending4