leveling jacks retract when ignition is turned on

[trigud]

Hi we have a 40´class A Monaco Diplomat 06
Our 3 leveling jacks go up before the air bags are filled to take over the leveling. It was not like this before and it is bad if we are not in a level parking spot. The body will twist. I´m afraid this will brake the windshield.
Can someone tell me what to check or do to fix this?
Tanks

[bdpreece]

If they go up immediately when the key hits the first position your problem is the Nason switch. The Nason switch is a switch on the bottom of the brake switch. This switch is used to indicate the jacks are down. Had mine fail while the step was out over the curb and when jacks went into what I call an emergency retract it bent the steps.

Nason P/N: SM-1C-66R/WP28
Hydraulic Controls in Phoenix .
Phone # 602-278-6088.

I understand there are several variations. So before ordering, remove your switch and you will see the part number on it.