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Thermostat in motorhome quit working

It is lit up, but cannot change any settings, can't select zones, and heater/ac is not working now at all apparently because the thermostat is no longer controlling it. It worked last night, but quit sometime before daylight.

It is a heat pump/AC system by RV Products, a division of Airxcel, Inc. Thermostat is by RV Products and is called a 8330A335 multi zone thermostat controller system

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Try removing power from t-stat and leave off for one minute and power back up see if resets

Posted on Nov 24, 2008

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Hi zone controlled thermostats are controlled normally by a master control stat that is wired ( linked ) to each zone. If you had them installed, they should have left you with the sequence of operation to explain to you how these stats work, and what to check in case of light trouble shooting? This I would insist on getting from them.Yes, I am sure they will click as each one is energized, but like I have said on all commercial heating and cooling thermostats that are zone controlled, even on a residential application, they came with a master control that sensed the temperature in that area where the zone covered, and the master received a signal to shut off the zone and automatically checked the other zones to see if they were calling for heat or cooling and would control the zone as needed. It doesn't make sense to me to have lets say 6 zones you are covering in the area of your cottage all alone like a thermostat.The click would be that it is either turning on the heat, or turning it off. This would be OK I assume, if they are controlling the heat and shutting the heaters off when you want them off, to save on your heating bill, but a programmable thermostat would do the exact same thing as the zone controllers, as these are used in office buildings, and for controlling hot water valves and dampers in the ceiling, as they have zone sensors located around the building to sense the temperature and send it back to a main controller. The zones are called slaves to this controller.I have never heard of this brand, most controllers for zone control are Johnston, Honeywell, Barber Coleman. I'm sure they are good, but I will need to find the sequence of operation, which I will get right on now. Hopefully, I can find out. If not, go back to the installer to get the paper work he should have left you explaining all to you and showing you the schematic on how they are arranged and operated either alone, or together. It just sounds to me like they are a digital sensor that senses the temperature, and maybe preset, or is adjustable inside for a certain comfort temperature, just like a programmable thermostat would do in this case. Please do what you can, and rate me on this, as I know you will be kind, but without a main control, I sincerely believe you are back where you started.
Sincerely,
Shastalaker7
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