I had an almost identical problem with my 2004 Winnebago Brave. The first dealer I took it to replaced both front solenoid valves which didn't solve the problem. The second dealer replaced the return springs on both front jacks with the new style tapered springs. That solved the problem. I've attached the HWH service bulletin that addresses jack retraction times. Read page 2 for a description of the new style jacks.
Thank you!! It's great to get advice from folks with WAY more experience and knowledge than I.
The paragraph below caught my eye (emphasis added). I will probably get the new springs but am expecting a new cylinder.
If the jacks will retract completely but exceed the allowable retraction times, replacing the return springs will in most cases resolve the problem. In normal conditions above freezing, if a jack will retract with a little assistance, replacing the springs may resolve the problem. If a jack has to be forced up, as with a
pry bar, the cylinder will most likely have to be replaced.
If replacing the springs does not solve the problem, the cylinder must be replaced. NOTE: If the jack is equipped with the new style tapered springs, do not replace the springs, replace or repair the cylinder.
I'll check it like HWH said and go from there!!