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Old 01-03-2021, 07:12 PM   #1
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Dometic electric Opus toilet won’t close.

Have a Magnum Opus toilet that remains open after flushing. Cycling the service switch (usually fixes most issues) didn’t work nor did removing the 12 V power to the control board. No problem, I have a spare board BUT the connectors are different and the needed ones are 700 miles away...a OH Schizer moment.

By removing the 12V power at the right moment I could get it to shut... not something the DW would be happy trying to do. Discovered led #11 would start blinking when it stayed open. Found the following Utube video that happens to have #11 blinking when a limit switch doesn’t work.

Fast forward an hour... one of the limit switches is bad and by connecting a pair of wires to its connections I can now use the toilet by shorting them together at the end of the flush cycle so the ball stays closed. This will work until I can get a replacement limit switch and a deep socket to remove the ball valve and motor.

https://www.google.com/url?sa=t&sour...-ewUf8PkEgX5ss

PSC Electronics is in Columbia, MO (573-814-3131) turns out they work on a lot of different RV items including the Opus control board based on several videos I watch trying to find their location.

Naturally the hole in the side doesn’t line up with the straight slot bolt head that’s supposed to let you manually open/close the ball valve with a screw driver.
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Old 01-03-2021, 08:44 PM   #2
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Finally found a good troubleshooting guide: http://pdfstream.manualsonline.com/9...c51d7523a8.pdf
Now if I can find the 342541 Snap-actionSwitch.
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Old 01-13-2021, 06:08 PM   #3
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I ordered the limit switches, neighbor needed some too so ordered the 6 of them...all of $8.50.
https://www.amazon.com/dp/B07NVDXGPS
They are the correct ones...fixed my problem. Was able to remove the switch without removing the entire mechanism but getting the new one back in was going to be difficult with the tools I had... removed the 3/8th nuts that hold and center the flush mechanism. After several tries I finally got the ball and seal lined up so the water stays in the bowl. In hindsight it would have been easier to put the new switch in without removing the flush mechanism than what it took to get the toilet to hold water again.

The black switch is the replacement and the bottom 2 lugs are the ones used...normally open.
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Old 01-18-2021, 11:12 AM   #4
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Over the weekend it started doing the same thing, not staying closed after flushing. Put the wires back on the control board plug so I could make it close. Got around to working on it this morning...Can’t imagine having to take a rig to a dealer every time something goes wrong, even when one is close bye and could get you in.
Anyway, I’ve gotten good at taking the screws out and turning it upside down. The cam that activates the switch had moved over, not contacting the switch. Was able to just push it back in place...kind of snapped back. Didn’t see any way of holding it in place so hopefully the ‘snap” is what holds it. Left the wires hooked up so I will not need them again.
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Old 01-22-2021, 01:04 PM   #5
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Needed the wires again ^^^^ and same problem...cam moved sideways again. On day one when trying to close using a straight slot screwdriver to close (didn’t lineup well) it appears I bent the motor mount so the activator arm is pushing the cam to the side. Bent the motor mount back so HOPEFULLY it’s finally FIXED!
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