I have a friend that has suffered from depression - severe - and has found the one thing that helps is a cold plunge.
Weird but it works. Ans yes, he has tried all the usual "remedies".
My GF has Martin that might be for sale so I was doing a bit of looking and perhaps came across the most talented bass player ever.
https://www.youtube.com/watch?v=IXnse1iniNk
https://www.youtube.com/watch?v=_UlDlkQcHTM
If it's icing the coils it's not a lack of refrigerant, it's a cycling problem. Your fridge would do the same if it just kept on cooling.
Put a timer in the circuit and it will work, it will ice the coils, shut off, the ice will melt, repeat.
99' bird with 65K so I'm thinking this winter might be time to have a look at valves. I stop at the Honda shop and ask if anyone has adjusted valves on a Blackbird.
I get a somewhat blank look and he asks me what brand bike is that. I'm not kidding. Then I find out the oldest guy in the shop was born in 82'.
It takes the service manager more than a half hour of looking at books so I leave and have them mail me an estimate, here it is.
I can do it myself 'if' I can get shims.