Originally Posted by gramps66
I m sure this has been discussed before. We have a 2009 HR Endevoure. I have tried the wand in the toilet, have hooked hose to tank clean out, tried chemicals, ice in toilet, heavy duty Dawn dish soap, hot water, In both tanks Black always flickers on the full and the Gray flickers between 1/2 and 3/4 all while empty. I have checked wires on tanks and on gauges all have good connections. I know we can go about 2 weeks between emptying. But it would be nice to press button and know. Next step is to take Coach in and have new sensors. Anything else to do or try. Its under warranty but taking it a dealer is pain in the ass!!!!!
Gramps Please note: As previously stated, use DAWN DISH WASHING SOAP, [not laundry soap]
You stated that you used the wand in the toilet but I doubt that is was the 'Camco 40074 RV Flexible Swivel Stick'.
Enter that full name on Amazon.com for the picture & description & scroll down slightly to see the brass shut off valve. Order both items & they ship free. Read the several pages of positive comments & they tell you to order he brass valve at the same time. It cleans my tank shinny clean. It makes one hell of a racket on the bottom of the tank but I don't worry about that. When I clean my tank at the end of the season I give it a second cleaning by tilting the entire motorhome up on the left side & I insert it thru the drain valve opening and give it another cleaning. Finish & close the tank valve before leveling the motorhome & draining the last amount.
I have a opening under my shower to the tank compartment that allows me to connect the water hose in the bathroom without dragging the hose thru the motorhome.
1995 F53 35U Bounder, Wide Body-Large Vertical Windows-NO SLIDES, Front Axle-Davis Tru-Trac Bar, Rear Axle-SuperSteer Trac Bar, TowBar/Brake System-NSA ReadyBrute Elite, Family Motor Coach Association F 513--F 513s