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Old 09-24-2016, 11:17 AM   #1
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Dometic Masterflush 8759

I have a 2011 American Tradition with a Dometic Masterflush 8759 toilet and I am having a recurring problem with the red light coming on preventing the toilet from flushing even when the black water tank is empty and the tank level sensor shows empty. Anyone else had this problem and if so did you find a way to fix it?

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Old 09-25-2016, 04:26 AM   #2
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If there is a short to ground on the circuit the red light comes on and flushing is prevented. Run a new conductor to the "Full" level sensor.

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Old 09-25-2016, 05:28 AM   #3
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I have a similar problem with my vacuflush system.it thinks the tank is full and will not operate, I followed the wiring diagram for the tank float and jumped them together.everything works.I think the float sometimes sticks I plan on wiring the float to a switch of my own asap. Everything works but I don't have the added safety of it not working if the tank is full. Had it to the dealer (It's a 2016 Bounder still under warranty) and after them being stumped for 3 weeks I said I'll take it and fix it myself.
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