1. Jbevolves

    Dometic Tstat issues start with E1, then E5 now what seems to be low voltage to tstats (both)

    Hello All, My first post, although I have been reading the forum since my purchase in 2020 of my 2017 Landmark 365 Madison. Thanks to everyone who shares and contributes. I began this trip down the rabbit hole with a simple E1 error in my front HVAC unit which controls the furnace. I tried...
  2. G

    AC Thermostat and control board upgrade

    Hello, I currently have a 2019 Heartland Prowler Lynx 25LX with a Dometic B57915.XX1J0 non-ducted rooftop AC installed. I also have a standard "heat only" furnace/thermostat (see picture). I have been doing some extensive research and I would like to install a "digital" thermostat so that...