I've had a delightful time with my Duo-Therm Penguin II. I wanted the manual (non-electric) shroud-mounted thermostat; after the third failure I replaced the shroud (different shroud for each!) and had the remote analog electric installed.
I'm on my 3rd remote - the original eventually couldn't hold a temp, the second just didn't work, and the last one turns on the heat strip and compressor at the same time, whether on heat or cool.
This thermostat is being phased out for digital, which naturally needs a different control board.
Fortunately, I took the extended warranty...
'94 Barth 28' Breakaway M/H ("StaRV II") diesel pusher: Spartan chassis, aluminum birdcage construction. Peninsular/AMG 6.5L TD (230HP), 18:1, Phazer, non-wastgated turbo, hi-pop injectors, 4L80E (Sun Coast TC & rebuild, M-H Pan), Dana 80 (M-H Cover), Fluidampr, EGT, trans temp, boost gage. Honda EV-4010 gaso genset, furnace, roof air, stove, microwave/convection, 2-dr. 3-way reefer. KVH R5SL Satellite. Cruises 2, sleeps 4, carries 6, and parties 8 (parties 12 - tested).
Stand-ins are an '02 Cadillac Escalade AWD 6.0L and an '06 Toyota Sienna Limited.