Re: HWH level light won't stay on
Reply #1 –
Primarily responding to bump this topic for visibility for the OP.
I recall in our 2003, the front (tank) gauges responding to the aux compressor running was an indication of a leaking or failed check valve or solenoid valve. In that model year, the only way to intentionally air up the main tanks with the aux compressor was to use the "air tank" switch, but I didn't think previous years had that option.