oddjobski

Hello Forum Looking for some help. I have a 2011 8 person Master Spa Twilight spa. Very happy with spa over all. I do have one re occurring issue with the circulating pump failing. I had the original pump replaced in 2013 ( after 2 years of service). The local dealer was helpful and replaced the pump as part of the spa warranty period as a unit. Once again the circulating pump has failed after 1 1/2 years. The pump is a Laing Thermotech part No: E14-NSTNNN2W-10, 230VAC 115watts 140 degree f temp and 29 psi. I know that the impeller bearing is the cause. water leaks into the motor housing and causes the motor to "lock rotor". This in turn shuts the pump off ( as it is supposed to due to high current). If the heater happens to be on when the pump stops, in turn turns the heater off (heater circulates via the circulating pump) as it is supposed (due to the high temp high limit). After a time the circulating cools enough that the overloads cools and the pump starts again and the cycle continues. After some time (days or weeks , not sure exactly) the final locked rotor then causes the main spa breaker to trip. Now the entire tub is off. Has anyone else experienced this sort of issue? I feel the Laig pump is not suitable for this tub perhaps. Is there another suitable replacement out there? The Laig pump is an expensive part to have to replace on average every two years. PS I was lucky enough to be able to talk with the Master Spa Reps recently hoping to get an answer to avoiding this issue, is it a common problem, etc... There response was that they had only heard of a couple instances where the pump failed and it was due to filter plugged issues. I understand that is possible extra strain on the motor. I my case it is most definitely NOT the issue. Our filters are cleaned on a regular basis and the tub is NOT heavily used (only my wife and I) I appreciate any insights, recalls, suitable alternative the Laig pump. Cheers From Calgary