i have a problem with one of the four pumps on my jacuzzi. we drained the hot tub about two months ago then filled it a few weeks ago. it was below freezing both times. after i started it back up, the 2.5 hp pump on the left never worked. all the others work fine. so when i hit the button to activate this pump all i hear is a click. i removed the access panel and then the cover to the electronics. what should i look for? there is a cylinder on the top of the pump, what is that. should i check anything simple? getting service isnt easy where i am. we had an indoor pool in our house and the service guy was miserable. the nearest jacuzzi store is more than 100 miles away. any clues would be appreciated. i am pretty decent at fixing things without getting hurt or messing up too much. thanks, robert