this unit had a bad evap motor
replaced it with a U291, half hour later customer called to say that the motor quit..
p/u 2nd one from wholesaler..... same thing after 1/2 hr.
called a.o. smith rep, tell us that these motors are air over only, in this cabinet though the shaft protrudes through the cabinet, motor on outside, no air over, this motor won't cut it, even though physically and watts, voltage...look identical
ok... order one from cornelius rep in canada, QBD, install this (I asked customer to install a small fan above by motor to give it external cooling, this worked, took two weeks to get motor from QBD)
1/2 run time this motor quits, internal overhead too... like previous ones, call QBD and told that need to install a gasket, nothing more that a 3 in diam, self adhesive 5/8 thick foam doughnut.... 1 1/2 week later, gasket arrives...
install gasket,.... 1/2 hour later motor quits...
QBD says is blade bent,? shaft bent? (is a new motor, isn't it, you supplied it)
just another day in making a living, can't bill for 5 trips can I...