Upon arrival meet with customer and he said that unit has been doing a banging noise. Tried to turn on the ac but I didn’t turn on . The board was getting power but it wasn’t sending power . Board is bad . Also the fan shaft was rusted and dust in the bottom which caused unit to have that noise. Unit is 8 yrs old out of warranty and recommend for replacement . Customer want a quote for board replacement and a quote for a new unit . Need to send a comfort advisor tomorrow at 12-1 pm