[hypoxia]

Aha!  That's good to know.  The left hour meter quit a couple of years ago & I replaced it a week ago, it is for the Jun-Air.  I need it working to keep track of oil change times for the Jun-Air.  The right hour meter for the right side Thomas compressor is probably accurate.  I'll use the Jun-Air when occupying the coach & the Thomas when it's parked.  The compressor cycles once every couple of days when not occupied.