We have a 17.52 Jayco Outback Expander with a Dometic B2200 Roof Top Airconditioner & we live in North Qld. From new this Aircon has been noisy & doesn't cool our van very well at all when it is hot, typically during the day, we were just wondering if we are the only ones with this problem, did we get a dud? & if anyone can give us a review on how their airconditioners work, any brand, we are thinking of replacing ours as we have young children which still need a sleep in the middle of the day.