All, I just learned something new about smart bed creep which I will confirm with HWH tomorrow or so (waiting on a call back). After having no creep issues for about two years now, this week-end my #4 smart bed (front PS) repeatedly moved out about 4 - 6 inches in about 30 minutes. Since I don't have the pressure gauge and fittings to do a test to see if the problem is isolated to a leaky cylinder extend solenoid valve or a piston leak in the smart bed hydraulic cylinder buried under the basement floor boards (see HWH ML42737/MI15.8330 07UG09), I was already to replace the "extend" solenoid for this particular smart bed (#2E on the HWH MI15.9502 01APR04 "Room Extension Solenoid Valve Replacement" Instruction Sheet schematic) when I decided to try something that HWH supervisor "Lon" did when he had his technician replace this same solenoid in 2011 at the HWH factory. All I did was run the smart bed out it's full length with about a 2-to-3 second hold at it max extension, run it back all the way in, again a 2-to-3 second hold, and repeated this process one more time. My smart bed creep problem disappeared. My guess is that either this little exercise either dislodged something in the solenoid valve seat preventing a full seal which is essential or I had some air bubbles in the line from frequent partial extends and retracts or just had not achieved proper pressurization of the cylinders due to the many partial extends and retracts of the smart bed. The only place I could find any HWH instructions about this fully extend, fully extract process was in a very old HWH brochure (MP35.6042 18SEP03). Hope the above info is useful. It saved me about 4 hours of solenoid valve replacement time which may not have fixed the problem. ray
Ray & Marilyn Robinson
2008 Alpine FDDS 36'