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Old 09-26-2020, 03:17 PM   #1
Junior Member
Join Date: Mar 2019
Posts: 2
Unhappy Dometic 8700 Toilet - Flashing Green Light

Got the dreaded red light the other day on the rear toilet, and had to turn off the house batteries to reset. Toilet worked fine for several days. Today, the green "power on" light started flashing continuously, like when changing flush modes, but it won't stop. Toilet won't flush, won't fill. Tried cutting the house batts. again but no luck. Any ideas?

Kris S.
2018 Ventana 4369
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Old 09-26-2020, 03:57 PM   #2
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Join Date: Nov 2015
Posts: 14,522
Flush switch is malfunctioning
Circuit board in control module is

Try unplugging the cable from control module or flush switch panel and see if it will reset
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Old 10-27-2020, 06:23 PM   #3
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Newmar Owners Club
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Posts: 19
flashing green

Mine is doing the same thing. Called Dometic and disconnected all the cables. reset power. no luck.
2015 DSDP 4366
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Old 10-28-2020, 09:31 AM   #4
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Join Date: Mar 2019
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I disconnected the cables as suggested as well, and had no luck. However, the issue resolved itself after driving down the road a while. We got to our next campsite and everything was functioning normally. My only guess is that once the sensor in the tank cleared (which in my experience sometimes requires bouncing down the road a bit) the circuitry must have reset properly. Lesson learned: Yellow light means DUMP NOW !!

Kris S.
2018 Ventana 4369
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dometic, light, toilet

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