this pump will run for 10 minutes and cut off...how do I fix it?...

father-in-law gave my wife an old 'OHECO' hot tub...[1990s era]...I can't find manufacturer to get in touch with them...

anyway, the pump will run for 10 minutes, then cuts off and won't restart for several hours, usually until the next day...then again it'll run for 10 minutes and shut off...

what would cause this and how can I repair pump?...

could it be a relay?...I know that first it stopped heating water...[pump heats water by a coil wrapped tightly around pump and both coil and pump are covered in insulation...

the pump's model number is 'A5YE 1331 [or L, hard to see]

there's also this number 1089, which I figure is date manufactured