HWH Jacks won't go down

Dachristianman wrote:
I took my daughter on a nature walk while I pondered motorhome ownership. When I returned, the power to the panel lights up. Strange thing is that when I open one of the T-handles and try to extend the jacks, the power to the control panel dies. There must be an internal breaker, because I can turn the power off and back on and everything comes back on. If I try to extend the jacks without the T-handle open, the pump will run but nothing happens at the jacks. The HWH manual says that if I have 3500 psi at the manifold, then it's the shuttle valve. I have no way to check to see if I have pressure, but since the slide operates, seems like their should be pressure there. Either way, I think I'm getting it narrowed down.

Tom

OK, THINK about what you just posted. You do NOT have a pressure gauge which puts you at a disadvantage, BUT, the fact the slides operate shows you have 3000 psi. IF you do NOT open the T handles, and the solenoids are defective OR there is NO 12 volt power to the solenoids, then the pump WILL run, but nothing will happen. You stated "Strange thing is that when I open one of the T-handles and try to extend the jacks, the power to the control panel dies". THAT points to an electrical problem, NOTHING else. Opening a T handle does nothing to the electrical system. Open all 4 and run the pump. You can run the pump by jumping the large posts on the 2nd solenoid, you do NOT have to go thru the touch pad. By jumping the battery power straight to the pump 12 volt motor and the T handles OPEN, you are supplying 3000 psi direct to all 4 jacks. IF they do not move, then replace the Shuttle valve. If even 1 jack extends and extends while you supply power, then the shuttle valve is OK. You seem to be hung up on the shuttle valve, BUT, on a 2001 HWH system, which is in the old years when they did have problems with shuttle valves, I would replace yours. The old Shuttle valve problems were ALL failure to retract, NEVER a problem extending. Doug