I have removed mine, not really a hard task. The hardest part to me was getting the lip unsealed from the coach, uky black sealant. After removing all the screws around the lip I used a putty knife and pliers to unstick it.
On mine I disconnected the LP line, & pulled it out slowly, to a point I could disconnect the 12V wire, and water lines, then pulled it out onto a bench. Then removed the 120V wire from the back and the motoraid coolant hoses (not sure if yours has motoraid or not.
They have changed their wiring on the newer models, where both the LP and AC sides are turned on and off by 12 volt relay. If you can't find one wired like yours, then you will need to add an additional 12V wire from the one place to heater, or rewire heater to use your existing 120V setup.
Dan & Sharon & Kasey (Our Yorkie Puppy (12 Yrs Old) On the Road (2012 Journey 36M, 2006 Jeep Liberty)
USN-Ret ('65-'93) Fulltimers, Class of 2012