[1retired06]

Welcome to the forum. There have been some issues with the new whisper air systems, recently being installed, not so much with the traditional noisy ones. Our first Montana was a front living room and We did not have any cooling issues. You might check for blocked ducting, dirty vent filters, and the possibility the AC in front is not operating properly, i.e. loss of coolant or compressor failing. Certainly a fan to enhance air circulation would help.