No more than a thermostat costs, I would replace it.  Get a 180 degree or higher.  I believe the stocker is 192.  Don't get a 160.  Most people tend to have many problems with anything much lower than a 180.  Will you be performing this yourself, or have someone do it for you?  IF you are not doing it yourself, then I don't know if would pay someone to do that when I wasn't for sure.  Hope this helps. 
		
	
		
		
		
		
		
		
			
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