I have a client with a Rudd UGPH-10EAMEA gas furnace with HSI.
The thermostat closes and the draft inducer starts. The airflow switch makes but the HSI never glows.
I unplugged the HSI and it never gets 120V
There are 3 LED's on the board:
From left to right there is an amber which I'm assuming is flame which is off.
The center green is flashing 3 times.
The right one is on.
Any help would be appreciated.
A link to Rudd flash codes would be great.