We have a 2015.5 Leisure Unity TB. We've been on the road since August 23rd (over 2 months now) and all the sudden last night at 3 am guess what! Beeping starts from the fridge!
The only way we could find a way to get back to sleep was shutting the fridge down. This morning we started research and started with the manual we got with the Liesure Travel Van. Nothing in there seemed to help.
We were about to call Triple E/Leisure and Dometic for help and/or repairs. (Off warranty I'm sure).
Here's what our research showed and it worked!
This is an ongoing problem with these fridges. (Humidity) Usually from what we've seen the techs at the shops do NOT know the real problem and simply replace the switch. This is not fixing the problem!
I continued my research to find that the problem is a build up of too much moisture where the wires connect to the inside fridge light. The moisture comes in to that area under the tape where the wires are covered by same. So I simply disconnected my light for now and yeahhhh NO beeps!
Apparently the fix is to take a small amount of silicone and seal the area where the wires come out under the tape which apparently stops the moisture from reaching the connectors at the light. Also remember to blow or wipe dry the wires, their connectors and the light connectors. My wife used a hair dryer.
This all began to make sense to us as yesterday afternoon (9 hours earlier) we had just arrived from inland to the Outer Banks in North Carolina (camped ocean side). It's very damp here right now - Humid!
Remember even if the inside fridge light goes out when the door is closed it may be on by such a small amount that it's barely noticeable which is still enough to set off the sensor and audible alarm (beeps). Good luck and I hope this helps!