We had a similar problem about a month ago while on the road. Turned out we had a 2 bad 6V batteries, even though all gauges indicated normal voltage. No low voltage alarm. Talked to Randy at Equalizer Systems technical support and he had me loosen a wire on the pressure switch and attempt to retract. He diagnosed 'faulty pressure switch' and drop shipped me another one. We didn't know about the batteries yet, that was a different issue that we were tackling while waiting for the switch. So, long story short, new batteries installed, hooked switch back up just for grins and leveling system worked like a charm. Equalizer Systems said we could return switch for refund.
Linear Mode
