For the air conditioner heat exchanger fan, the capacity of one of the fuses is higher than it should be, and therefore, when the fan is stuck or rotates under a high road due to an external factor such as caked mud, the fan motor may overheat. If this problem is unattended, heat can cause the motor to emit combustible gas, and also it can cause the motor brackets to melt. If the motor falls and comes in contact with the air conditioner heat exchanger, causing a spark, in the worst case, the combustible gas could catch fire, which could result in a fire.