I did a similar mod to this and it has worked great for 4 years now. Instead of a key I used some thin but very stiff spring steel that was cut to make a tab that can be rotated over the switch to hold it down. A hole was drilled in the upper end of the tab to attach with the upper switch screw. A key would work fine. Actually, it may serve as a nice place store a backup key.
Pete
2006 RT 210P
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Posted By: PSW on 12/03/11 06:27am
I took an old house key and then removed the top mounting screw on the RT macerator switch in the door. I then reinstalled the screw with the key mounted just like a washer, inserting the screw through the key ring hole at top of the key. What this makes then is an elongated washer which is really a lever.
This does not affect the door at all and all you have to do is depress the switch and swing the key down over it to hold it in place. To stop it, just swing the key back off the button. Free solution, no wiring, no nothin'. Did that five years ago and works like a charm. The price is right, too: free.
Came from this site that has other ideas too.
http://www.rv.net/forum/index.cfm/fusea ... t/true.cfm