Three times now, my HWH 310 Series room extender has become unresponsive to the Extend/Retract rocker switches. One is on the dash, the other in the bedroom. The LR slide is a flat floor type with two rams, the BR slide moves the closet with a single ram.
All three times this has happened it was on the day I was leaving a RV park, so very annoying. It's never cost me more than an hour so far but I'd like to be ahead of the issue.
I have never found the exact cause. Once I thought that a small 2-wire connector (marked Travel) had fallen off because the system came to life after I replaced it. I was mistaken about that because the next time it happen, I checked and that connector was nice and tight.
This last time it happened, I messed with the wires and connectors under the dash going to the controller, checked the fuses (all good), and no go. Then I went outside and wiggled the wires out there. No go. Then I went out with a rubber mallet and gave everything a good whack. Here's a pic of my manifold. It is under the LR slide, aft.
Whacking on things may or may not have had something to do with the restoration of operation this time but whatever, the slides started operating immediately after. This time I left the RV park just 1/2 hour later than expected.
There are no weird noises I can detect when I press the retract switch when it's not working, the batteries are new, the BR slide gets operated once a week when I dump, without issue so far except the 3 mornings when it's failed when I've been ready to travel. When the slides are working, they are smooth, no jerking, hesitation, grinding noises. They sound and work great...when they work.
This situation is annoying and I'm hoping someone has run into this intermittent type operation with the HWH system before and might have some suggestions.