Good work, whenever I come across pressure switch issues, i made it a habit to take out my manometer take readings so it prevents nuisance repeat calls.
Because I think that pressure switch is normally closed and the other side of the gray wires goes to the gas valve. It just won’t allow the gas valve to open.
As mentioned, always good to check pressure switch with a manometer. Also, on this installation, should the furnace condensate line be "T'd" before it drains into the condensate pump? Do you have a double trap here? I enjoy your posts. Did you get new glasses?
This was a hack install, in the works of Getting new equipment with these customers. I went through the pressures last year but yes I should have checked. This call was obvious of what the cause was. I were two different pairs of glasses. It’s about time to get some different ones. 😬🥸
