I have two Tunze 6105's purchased in July 2014. I am using an Apex to control them. I have noted the Tunze instructions stating that other manufacturer's controllers are not to be used with this pump. However, it seems that everyone with an Apex uses it to control them. Also, the Apex instructions say that the pump should not be operated at less than 30% which I have complied with for all the programming.
Anyway, I have had both pumps to lock up about the same time in two different instances. In November, both were locked up and I cleaned them both with a vinegar bath and they began to operate again. I noticed that the impellers were very tight. But, after the vinegar bath, it seemed to be better. Now, three weeks later, they are both locked up again. It seems that the magnets are frozen to the shafts in both pumps. It is really strange that both seem to fail at the same time or at least within one or two days of each other. I'm currently cleaning again in vinegar but I am doubtful that it will work this time.
Has anyone had similar problems with this pump? If it not for the Apex, what else could be causing the problem? I have not contacted Tunze support yet but will on Monday morning.
Anyway, I have had both pumps to lock up about the same time in two different instances. In November, both were locked up and I cleaned them both with a vinegar bath and they began to operate again. I noticed that the impellers were very tight. But, after the vinegar bath, it seemed to be better. Now, three weeks later, they are both locked up again. It seems that the magnets are frozen to the shafts in both pumps. It is really strange that both seem to fail at the same time or at least within one or two days of each other. I'm currently cleaning again in vinegar but I am doubtful that it will work this time.
Has anyone had similar problems with this pump? If it not for the Apex, what else could be causing the problem? I have not contacted Tunze support yet but will on Monday morning.