Are you familiar with tankless water heater igniter control board ?
The problem is it won’t ignite electric arc.
I tried recaping the electrolyte capacitors, 100uF 10v which was faulty measured by ESR reading.
I measured the elco 10uF 16v, ESR reading is fine. So I let it alone.
I did replace the 3 micro switches.
2 of them are short circut, I tested the connectivity while they’re still soldered to the board.
But strange thing is, when I desoldered the 2 of them.
These 2 micro switches are fine, nothing is wrong with them.
But I replaced all of them anyway.
The igniter still is dead silent.
My suspicion is these little diodes are shortcircut or faulty.
I can’t find its schematic (tankless Paloma water heater PH5-WX)
to find out what are these diodes.
Anyone knows what these diodes are or has any ideas of how to fix it ?