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In the Lippert system, there is a pressure switch. I have a similar problem. when raising the jacks, the computer knows the jacks are retracted by use of pressure differential, in other words, when the jacks are fully retracted, a pressure switch flips and tells the controller the jacks are retracted. If this switch does not flip, the controller "Thinks" the jacks are down, when in fact they are not. There could be several reasons why, but here are the most obvious items to check first:
1. Fluid level (remember to check the fluid only with the jacks fully retracted).
2. Obvious sings of leaking (could cause a pressure loss over time).
3. Bubbling or leaking hoses or fittings around the pump.
4. Bad pressure switch
5. Bad controller board
6. Bad pump.
You can still use the jacks, however, they must be used in manual mode only, and you must pull the fuse for the pump motor once the jacks are retracted, otherwise it will keep running and the alarm will continue to go off.
Good Luck with it...
Bill
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2020 Grand Design Reflection 315RLTS
2019 GMC Sierra Denali Duramax
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Linear Mode
