Hi all. I'm back. Years ago, 2012, I posted about a float valve above my boiler leaking. It sat above the expansion tank, which sits directly above the boiler. It left a puddle on top of the boiler which I cleaned up and promptly had the float valve replaced. What I did not notice was that the water had run down inside (at the top) and along the slanted metal plate into the front of the boiler (on all of the electronic boards at the front). Over the past several years, the boiler has run with some issues and progressively gotten worse (Lochinvar Solution hot water). It wasn't until the winter of 2015/2016 that I opened the front panel and saw that some of the stickers had at one time gotten wet (from 2012). You could also see dried water spots on the ledge below the boards. Everything looked to have been completely dry, but it wasn't until my inspection that I saw a warning on the spark ignitor that it should not be used if it has gotten wet (!) Naturally I thought this was where my problems stemmed from and had a heater repairman come out to replace it in early 2016. Sadly, the boiler continued to operate poorly so he called another technician out. The next guy said it was the gas valve and that was also replaced. This did not fix it either. By this time I was $1100 poorer and with no heat and couldn't afford any more repairs to be made. Last fall 2017, I turned on the boiler, it worked for 3 days, it started making the loud buzzing on and then off cycling and then it stopped. This time, it seemed to be dead. No lights on the spark ignitor, nothing. The circulator pump seems to work just fine and circulates the water when the thermostat is turned on, but that is all. When I turn on the power switch at the boiler, I can 'hear' electricity, but there seems to be none going into the boiler. Last winter 2017/2018 I went without any heat. I drained the boiler to keep the pipes from freezing.
*** An explanation of what was happening throughout this (noises and such)***
You could hear the gas valve open, the pilot light would light the gas with a whoosh!, then poof! it would shut off with a little clunk. It would do this repeatedly and every so often it would catch, heat up like normal and then shut off until there was another call for heat and then start/shut off all over again. Sometimes there would be a very loud buzzing sound and it would shut off. Then it would make this buzzing noise again. I would watch the light codes on the spark ignitor to try to figure out what was wrong, but the codes were not always the same. The solenoid (I looked up the part!) is rusted and there is rusty dust below it on the small ledge beneath it. Could this be the problem? Is it the aquastat?
In closing, I wish I had realized that the water had gotten onto the front controls. It never dawned on me that it had rolled down under the front cover. I am at my wit's end as to what to do. Now I'm not sure because nothing turns on anymore. The boiler is 10 years old... I'm on here hoping for some suggestions. I have a repairman/plumber coming this Friday and I'd like to be able to help and have some hope that it isn't toast. Thank you all in advance for sharing your expertise.