Yours may be similar to our previous 03 Adventurer 33V. The panel has an L bracket at bottom inside corner, 2 screws. Open heater door and there should be 3 or 4 screwas going into end of board. On mine the water pump, water pipes and a light were also installed on board. I removed pump outlet connection and placed pump on shelf. Removed light and inserter butt connectors on wires to facilitate removing lite. Unscrew piping from board and move carefully to the left. Board then is worked out.
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