I had a similar issue after picking my 2018 Outlaw 29H from the dealer after service early last spring.
First problem was the 100A breaker under the rig next to the battery box was tripped and kept tripping occasionally.
Then I found that I was getting a Jacks Down error even when the levelers were all the way up.
When doing an Auto Retract the pump would keep running until it tripped the 100A breaker..... leading to a low voltage alarm.
After a bunch of troubleshooting, I ordered a new pressure switch from Amazon because I didn’t want to drive 5 hours back to the dealer. That solved my problem.
Turns out the pressure switch was not sensing the pressure buildup when the jacks were retracted to trip the switch and shut off the pump. It’s been working just fine since.... and I wrote Thor and they reimbursed me for the part.
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