Thanks for the model & serial number. Per your serial number, the unit was built in March 2008, so I checked all the service bulletins from 2007 forward that could apply to this and similar models. I found nothing listed regarding the control having problems like your machine.
I am a bit confused about one point. You state before that 'The front panel of my Frigidaire Affinity Front Loader has been forced to buckle in slightly inward at the center when mounted. This warpage has caused the speed control button, mounted in the front panel, to activate its associated microswitch, without anyone pressing it.'
however in your last post you state that that 'it worked fine for three years'
and 'Nobody ran a truck into the washer, or dropped heavy objects onto it.'
Since we are not able to physically inspect the unit, we have to go by your observations. So, if we base a diagnosis on the statement in your first post that you noticed that the control panel is being forced to buckle in the center when mounted, then that leads us to conclude that something got bent after three years of trouble-free use and needs straightened. However, going on your last post, there may be several possible issues to check and fix. I may suspect that the 'torsion' springs behind the buttons are weakening, which would necessitate a parts replacement (item #12, P/N 134884900
, Spring, push button) or somehow the control panel became warped and may need replaced. I have seen a number of these control panel corners crack and break at the end where the dispenser drawer slides in, which I suppose could lead to poor alignment and twisting, but I can't say I've run into one that warped on it's own.
I assume when you say you you have to loosen screws you are referring to those holding the main control board & housing (item #1 in parts breakdown) to the control panel? The best I can suggest at this time is to check and remedy the following, if you haven't already done so:
1 - Make sure the button area is clean around the openings in the control panel and control board, as softeners and detergents can dry and congeal, causing things to stick.
2 - Be sure the unit is sitting level, as the cabinet can twist and could cause a twist in the control panel (not normal, but possible)
3 - Verify free movement of buttons on control with panel removed from cabinet. If you have free movement of the buttons with the control tightened down on the control panel but the control panel out of the unit, but once mounted it sticks, then you definitely have a cabinet issue. If you tighten down the control on the control panel and the button sticks before you mount the control panel to the unit, then your issue is in that area.
4 - Check / straighten cabinet where control panel mounts if needed.
If all these seem OK, then you may need to replace the push button springs. Sorry if I can't give you a definite 'this is it' fix, as all we can do is try to guide you from your observations. This just isn't one of those problems with a clear cut solution.
Let us know how it goes.