[randman1]

Blinking ECC indicates a fault in the system. Low freon, low pressure or voltage, air mix door... could be lots of different things. Through 93, the ECC has an on-board diagnostics where the codes could be displayed right on the VFD display. Starting in 94, the codes need to be read with a scanner of sorts. You will need to get the code(s) to find out what's at fault first.