FWIW:
I know others smarter than I have posted that these RV AC units do not come with the fittings required to recharge them. So they are "one time use only." There is a thread somewhere here on the forum in which someone added the required fittings and then recharged. You might want to do some searching, if you know someone who would be able to actually do the work.
There are also postings concerning a bad batch of Dometic AC units. IIRC, they were from around the year of your TT.
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1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybrid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
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