Took it apart today. Pump shaft ok, but motor seized up. Called Thetford, they want $279 for the motor/pump assembly! No longer sell just the motor alone. Was able to free up the motor shaft w/ WD 40. Smeared silicone grease around the shaft and put it back together, works ok now (but for how long?). Poor design, motor exposed to 100% humidity when toilet is in operation, they should have used a sealed motor.
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