I've been digging them, but my back can't handle it anymore. I'm dealing with four washes now, we just priced out having them pumped and they want $6000 twice a year. Time to buy a Ring-o-matic clamshell cleaner...
I strongly recommend the cog-style belts. They last longer because they don't get as hot from bending around the motor pulley. vbeltsupply.com has Gates belts really cheap, shipping is kind of high so I order spares for everything at once.
Replacing the PLC is very easy. The entire terminal strip comes off with a couple screws. You do have to buy a replacement from someone who can pre-program it, but if a simple component such as a relay fails, it should be able to be repaired without it losing the programming.
You can get a clamp-on amp meter for $30 and load test the motor in place.
Make sure the tank is being drained. Frequent starts and short runs will cause early failures.
You should hear a brief release of air every time it shuts off. If you don't, it's starting under load as JGinther mentioned.
Klean Wall will get them clean, but it etches that tile block, removes the shine, and makes it pick up marks and dirt even worse than before. If it's not already dull, try Nu-Wall. I've never used it myself, but it supposedly won't ruin the finish.
Now it's LGBTQIAPK, more than a third of the alphabet. Next it will be LGBTIQCAPGNGFNBA (Not a joke, they're literally trying to make the world's longest acronym).
Not frowned upon, but when the same question is brought up in multiple threads it can get difficult to follow. You can always bump your old thread to bring it back to the top.
There were at least 12 in Austin Tx. A group of guys I worked for bought them around 1990 in a package from the bank. One was so bad the bank literally threw it in for free.
Then assuming all the "commons" are connected together somewhere, I would recommend checking all the 24V outputs against each other. If you use a voltmeter and touch one probe to bay 1 "hot" and the other to bay 2 "hot," the voltage should be at zero; same with the commons. If someone has...
It would help to know what that component is that keeps burning up. Does it happen again on a board that's been repaired? Could be something that's just failing with age.