having problem with undercarriage staying on during high pressure wash cycle. this is a problem we expereince about every 6-9 mos. usually is stuck u.c. valve. my question involves bypassing the under carriage valve or somehow plumbing around it and using a less expensive 24v or 110 v open/close solenoid valve. it has always seemed like overkill to me that the undercarriage runs off the giant lp123 pump. any expereinces with this issue??