I bought a used (2000) DP a couple of months ago. I spend a lot of time worrying about what can go wrong (as it sits in the driveway). I live in WA and it has been well below or just above freezing for about three weeks. I winterized the MH and have it plugged in to a 50 amp service with the heat on at a very low temp (~40 deg.). After reading several posts, on a couple of boards, I decided not to start the MH while the temp was in the low teens. Today with temps in the low 30s I started the MH and generator (unpluggin the mh) and ran the systems to operating temps. In doing so I noticed that the air pressure gage was either pegged over #150 or at zero. (Over thanksgiving we took it out for a day and the pressure was between #105 and #120). Being a civilian/govt. nuke and having it drilled into my head to always believe my indications, I have to wonder if it is even possible for the air presssure to be pegged and, even with diminished eyesight ( I did not turn on the lights), do not really believe that it is zero. I have also seen reactor trips cause by frozen sensing lines. Is the indication correct? Should I take it off the jacks to see if the airbags are still inflated? Any opinions will be appreciated.