a customer called the blower fan short cycle. when I got there , open the far compartment cover, take a thorough check. press the door switch, the fan work ok. but When I closed the door , just few minutes later, the fan start short cycle again.fileter is clean. when the fan is work, air is big.I measured voltage is 115v between the hotline and nuture of the fan moter when the fan is not working.so I think the fan overheated and thermal protection. checked the run capacitor, the rate is 15uf , but I measured only 5uf. changed the new capacitor. measured the current is 11.50amp( the old one is 12.5amp). the fan still short cycle. do you think the fan moter need to be change?