Hi , have just replaced the circuit board in a Fisher and Paykel fridge freezer , turned on ok but the display lights and door light werent working , pressed buttons on display and they started working , 3 minutes later when either door was opened a loud alarm sounded with display lights flashing red and green , the alarm stopped when any button on display was pushed or either door was closed - them start again when any door was opened . Everything else appears to work . Manually put it into Sabbath mode - which works , motor cuts off when fridge gets down to temp . Earlier , I replaced the lower door seal - then noticed a small rectangular magnet on the ground , not sure if it fell out of the old seal or door ?? Any help would be appreciated - also recently replaced the defrost element in the freezer .

Refrigerators - Fisher and Paykel