When you say relay board, I assume you mean the MRCB which lays horizontal on top of the controller. what do you mean when you say it had a bad switch? Have you checked the slowdown switches on the car top. If both boards are showing the same problem, then the problem lies elsewhere. check the COB board in the Cab COP. This board is where the sldn switches terminate. The problem seems to be you aren't slowing down at intermediate floors. Does the user interface show any error's? These units will run and run. However they are fairly complicated. When they have a problem you need a manual and a print. you can make all adjustments from the U.I. If the U.I. is not operable, you need a service tool to release it.
