Louong is right on. Go through the steps he mentioned. If that does not fix it, it is in the control board. These boards are very expensive. (because you cant get them from anyone else) They are about five hundred dollars. To help some of my cash strapped customers, I placed a switch under the control panel,Ran 12 volts to it, then ran that wire to the ind. jack solonoid. To operate that jack, you will have to hold the switch closed while you are operating the panel. This is for both up and down.
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