This may be the answer re the A/C. It concerns the fresh air intake. <br><br>http://tab-rv.vanillaforums.com/discussion/3564/air-conditioning-unit-change-out-part-2-ac-cabinet-modificatio… (View Post)
We find the need to rock the Tab a little to get the coupler to seat. Once it is in the correct position, then it locks down or releases easily. If you are not level, it can also be a challenge. (View Post)