Quoted from Zalandrys:Tried a few more things. Increasing the flipper hold boost from 3 to 4 definitely reduced the knockdown, but you can tell that the coil is getting hotter. The right flipper started to really weaken when compared to the left, I’d assume because I tend to hold it more often. I saw a suggestion somewhere to lower the flipper hold boost to reduce heat, but that did not work at all. With flipper hold boost set to 2, the flipper just collapses the first time it is hit from the scoop.
Still on the hunt to see if there is a remedy.
This is odd, because it should not overheat, but at hold boost level 4, I could see that happening. I would leave this at hold boost 3 and look into other issues. Do you know how to real an ohm meter and test the main power winding of the coil? I wonder if that coil has been overheated pretty severely in the past and having issues. I know that I have not heard of flipper issues on TNA in quite some time, so we will get this working for you. Also, yeah, if the hold boost is set to 4 and you are holding the flipper up all the time, it will get pretty hot.
Also, this is a key piece of information that I am not sure many people know about. About halfway through the run (estimated as I have no clue exactly when this was done, the flipper coil stops were switched to the A-12111 stop to help with the flipper hold.
Here is what the A-10821 coil stops look like:
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And here is what the A-12111 coil stops look like:
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If you have the A-10821 coil stops in your game, I would recommend swapping them with these:
https://www.pinballlife.com/williamsbally-flipper-coil-stop-a-12111.html
All the spooky games after about half the run of TNA use the A-12111 coil stop and all of the Pinball Life rebuild kits for spooky include the A-12111 coil stops.
--Scott