Try to identify your unit here:
Slide-Outs - Customer Support
In each selection you can find FAQs and documents where you can find trouble shooting and adjustments. There will be a control panel somewhere in the coach. Many of the coaches I have had, had the controller on the ceiling of the basement compartment most below the slide. Many of these controllers will have error code LEDs on them, but with your issue, there is not likely any error codes. You will need to look at the adjustments for the issue you are experiencing.
If you can find more details of which model you have, I maybe able to be of more help. I hope this is of some help at least?