Thor Forums

[Judge]

It is likely one of two things causing the Jacks Down alarm.

There is either a hydraulic leak causing the pressure to drop and it is triggering the Jacks Down alarm even though they are in the up position. This would be easy to determine because you’d see a puddle of hydraulic fluid under the coach somewhere.

The other possibility is the pressure sensor on the power control unit is not working properly. The pressure could be fine and the jacks properly stowed but if the sensor is reading the pressure to be too low, it will send a Jacks Down alarm.

I had this problem on my old coach. It was a 2018 Outlaw 29H. After troubleshooting I determined it was a bad pressure sensor. I ordered one on Amazon and it fixed the problem. It was under warranty but I ended up fixing it myself and sent the info to Thor and they reimbursed me for it.

I would bet the pressure sensor is your problem. If the pump runs long enough during trying to get the pressure where it is supposed to be, it can trip the 100amp breaker as an FYI. I had this happen as well until I repacks we the sensor.

I also just has had this error happen on my new coach as well ... a 2020 Magnitude SV34. I had a small leak at my power control unit that got worse. I was going to have the dealer take care of it during an upcoming appointment this week but it got so bad it caused the Jacks Down Alarm when driving. I ended up fixing it this weekend because the leak almost drained the tank. Turned out to be a damaged o-ring on one of the return hoses at the T-fitting. Picked up one at the auto parts store and after refilling and cycling the Jacks the error cleared and no more leak.