Controllable or non-controllable? I'm wondering if it's the variable speed that is the problem and supposing for a moment that's the real issue then I'm not real surprised to hear that Vortech's are probably subject to the same kinds of issues..  
 
Annoying as hell, I hands-down just can't afford to buy another Tunze to replace this one. If it's unserviceable I'm going to have to make do with less flow in the tank for a little while. 
		
	
		
		
		
		
			
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				 -- Tony 
 My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills.  Whee! 
 
			 
		
		
		
		
	
		
		
	
	
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