What can you tell me about the sensors in my black holding tank? It reads full all the time and I know it isn't. All the other sensors work (grey tank, fresh water, propane, battery). Is there an easy fix or can it be fixed without replacement? I am very mechanically inclined and am sure I can fix it if I knew what to look for. Thank you!
Keith, (Mill Hall, PA)
Well Keith, what I can tell you is that I get a ton of emails regarding your exact problem! So much so, I've researched a new product available to all RVers. Please see my review of the Horst Miracle Probes here.
Keith, (Mill Hall, PA)

(Note: the original response to Keith was edited in the spirit of consolidation here on the RV Doctor Website).