washer problem

I have a Maytag Neptune mah4000. To make a long story short, the machine worked fine until some repairs were made to it. The repairs were done as part of the settlement which Maytag reached over a class action suit. Now, the machine won't go into the spin cycle. Three circuit boards and a month later, the problem is still not fixed. I opened up the front of the machine and found the plunger which pushes a microswitch is not hitting the switch. It passes just above it. The technician came out and said the switch was worn out and to get a new one. Tried this but it didn't fix it. A piece of well placed particle board fixes the problem, but I'd rather fix it properly. Any idea what I should do? Thanks for any info.