Got a smelly Dometic toilet? This could be the problem

By Steve Savage, Mobility RV Service


If by chance your new RV came with a Dometic Series 300 commode as standard equipment and suddenly your bathroom smells like a cesspool, here’s what might have happened. Unlike commodes in the past, the top and bottom halves of this appliance are sealed internally and are not to be separated. Do not attempt to separate them!

All goes well unless the seal breaks, and the rear of the commode becomes a storage container for bodily waste. When this happens the entire commode must be replaced. The Series 300 has been replaced by Series 310 at your service center.

If you choose to replace it yourself, shut off the water to your RV. Disconnect the water line at the rear of the commode. Unbolt the commode from the floor and lift it straight up. Do not tip it or turn it upside down or you will have an incredible mess. There are no parts from the old commode that will be reused on the replacement.

Editor’s note: Several RVers have commented about this problem; all have reported that Dometic was quick to respond by sending out a new 310 model toilet.

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Sherry Shumer
25 days ago

Who does one contact to get a replacement? What is needed to get the replacement?

29 days ago

I can verify that though this story is old, the problem still exists. We just had this exact thing happen on our 2019 Passport, which we purchased new, and dealing with Dometic on it is a royal pain. 2 hours, 45 minutes on hold to be told they will no longer handle the issue directly, but one must go through a dealer. I think most folks who have had things handled through their dealer knows what that means: Delays, excuses, and frustration.

I wasn’t going for that, as the written warranty clearly states that the customer has the option of either dealing with a dealer, or contacting Dometic directly. I called back and the person who initially answered directed me to a supervisor, who then took care of the issue. I’m waiting for my new 310 toilet to arrive. Internet searches reveal that problem with the 300 exists to this day, yet they are still putting them in new units. There probably needs to be a class-action lawsuit over this.

24 days ago
Reply to  C.Lee

Got the same issue with our 2019 FR VIBE THAT WE BROUGHT NEW LAST(2019) MAY. Sound like I may as well bit the bullet and buy a new toilet and replace it myself.

10 days ago
Reply to  C.Lee

Happened to us on a 2019 they replaced it and now 1 year later same issue looking to replace with different model these toilets are Trash

Michel Ricard
3 months ago

I had this problem and Dometic, through my service center, did not want to exchange toiletries. I’m in Quebec.