Here's some basic info to help in identifying the issue:
- RV steps generally are powered by the Chassis battery(s), not shore power, and they are also tied into the ignition, since the steps must come in when the vehicle is moving.
- If the batteries are not charging, while on Shore Power, then you have lost the 120v incoming power to the Converter. Or, the same if you have an integrated Inverter/Charger.
- the ATS(automatic transfer switch), which is a switch between the Shore Power and the Generator power, is not effected, or connected, to the USE/STORE 'house disconnect' switch.
The ATS is working properly if you have Shore Power.
-the USE/STORE 'disconnect' switch is ONLY for the 12v system, otherwise for disconnecting the Fuse Panel, even though 'some' 12v devices may StILL continue to draw from the HOUSE Battery bank, such as C02 or Smoke detectors, etc.
Yes, it 'should' make an audible 'click' or 'clunk' when switched, but it's not always as audible on some RVs as on others. Turn on any interior LIGHT, then use the USE/STORE switch to get a VISUAL confirmation of whether it's operating properly.