aqua rite t-3

My salt reading is 2000 so I added salt. Still reading 2000 but the pool test co says 4400 ppm The cell votage reads 32.4 and amps are zero. Reset the ppm but it still reads 2000. The cell center around the cell where the logo is has turned brown for some time as if it has been over heated. The cell size is correct all the voltages are correct on the main board as are the amps. The cell is 3 years old.

Any help would be appreciated

What you’re describing seems to be the symptoms of an aged cell that needs to be replaced. 3 years is the average lifespan for most of the salt cells.