I know that this is an older post, but earlier this week our coach exhibited the same symptoms as originally posted here by Paul Champagne. I wanted to include my findings under the same topic.
2006 Patriot Thunder with HWH 2000 Series Air Leveling System (air only).
Symptoms;
- The HWH touch pad appeared to be functioning normally (including the green travel mode indicator).
- Travel Mode worked as expected.
- Level (auto and manual), Raise, Dump and Tag Lift functions were all INOP.
Looking at the HWH control box, I observed that;
- The Travel Mode LEDs indicated normal.
- The yellow ‘level’ LEDs lit as expected, indicating that the ‘level’ relays were receiving a close signal.
- The red ‘level’ LEDS were dark, suggesting that there was no power on the output pin of the relays (power to the 6-pack solenoids).
I looked in the Front Run Box and found that there are at least five fuses labeled ‘AIR LVL’ or ‘LEVEL’. The 20-amp fuse on board #12, labeled ‘AIR LVL’, was blown. I replaced the fuse and, so far, all is good.
Travel Mode worked because because its power is sourced from a separate 12-volt circuit (I assume one of the 15-amp fused circuits).
I have communicated with Paul and it turns out he also discovered the same 20-amp fuse was blown.