Frost control

I don't know about RV refrigerators but residential units have not used stile heaters in many years. They route the return line (which is hot)around the door and mullion area to reduce moisture.

My 94 rig has the switch on the outside of door to set off or on. It is another one of those improvements on newer units that probably should have been left alone

'tiredTeacher wrote:
So, how do I determine if my Dometic model DM2652LBX (ser.#31389593) has such a situation?

Our 2014 Coachmen Freedom Express has the same fridge, it does have the climate control heating element but no switch for turning it off regardless of the schematics that indicates it does. The solution is simple though - just add your own switch, just as I did ... no need to open any "control panel". Pics are in my gallery.

'tiredTeacher wrote:
The reefer in my 1995 Sunline had a switch on the front to operate the frost control for humid conditions. The reefer in my 2014 Rockwood has no switch, BUT I've seen on forums where folks have discovered that their units had such a heating device, only it was always "on" instead of being switched. Now, having a 12V heating element on all the time isn't good for boondocking.
So, how do I determine if my Dometic model DM2652LBX (ser.#31389593) has such a situation?
My manual covers several models so it is no help.

Thanx,
Teach

I think it's same to assume your fridge has one, and it's always on.

Feel the door-seal area of your reefer. Mine is noticeably warm from the always-on heater (Norcold here).

An old resi-reefer at my folks had an "ECO SWITCH" that turned the door seal heater on/off. They bought that in the late 80s. The fridge from my dorm, and the one I bought after buying my first house both have always-on heaters, as well as the Norcold in my RV.

If you're feeling brave, you could open up the control panel, find the plug for the heater on the control board and splice in a switch.