I have a fisher & paykel E521T.recently noticed frost building up at back of freezer & the fridge is not as cold as it should be.inside fridge temp control beeps twice & flashes red.what is wrong.

If your Fisher and Paykel E521T fridge isn't cooling properly, check the temperature settings, clean the condenser coils, ensure proper ventilation around the fridge, and inspect the door seals for any leaks. If issues persist, consider contacting Fisher and Paykel customer support or a professional technician for assistance.

check the fan that blows the cold air from the freezer to the fridge,this is a common fault it is located between the fridge and freezer compartments

Did you try an other electrical outlet? Can you test the outlet has any voltage?
does the fridge have an on / off switch? I don't think so, so if nothing works also check the cable and the plug going in the outlet.

Have they cleaned the drain tube that runs down the back of the fridge? If not and the tube is clogged water will back up and give you the problem that you are having. The only other thing that I can think of, is that the defrost cycle may not be set to a minimum amount of time to where this can be increased to allow the freezer not to let the ice build up.

Clear ice build up from drain plug using hot water in a syringe. Works well I just did mine. Located behind access panel inside fridge. Blue tube running down the back. Pull down and remove ice from the drain at the top.

check the thermostat level

trn your thermostat right down see if that helps

is there frost building up in back of freezer?

hi .thanks for the question .it could be dirt behind the fridge, on the coils. pull fridge away from wall .remove the back panel. clean all coils .if not dirty check to see if fan is going in freezer, also check for frost build up in freezer. thanks the appliance doc