Model E372b Fisher & Pykel - Beeps with Fridge Door closed periodically-Higest shelves warm lower down freezes things

First I would like to say thanks for all the information on the Fisher-Paykel active smart fridge freezer problems. This was a lot more useful than their customer support help line… After a week of hanging on for ten minutes without any answer I had a look on the net and found your site with descriptions of similar problems so I decided to investigate further
I have a Fisher Paykel fridge freezer (model 402B in the UK) about three years old. Although it didn’t seem to be as cold as normal, the first sign of a serious problem was when it started making a rattling or knocking noise from the freezer compartment. Looking inside it was obviously iced up solid and the noise was probably the fan catching the ice. So first thing I decided to try was a days de icing after which everything seemed ok except the green indicator light was now flashing about once every second.
Two weeks later it was badly iced up again so the problem was still there. At first I suspected the fans (which I could never see actually working). I disconnected one and tried it with a 6v torch battery and it spun ok. It was then I realised what was happening - the fans cut out whenever the door is opened so they are always stopped if you look inside.
A closer look at the aluminium heat exchanger(behind the plastic panel at the back of the freezer section) showed there was some kind of heater element clipped along the bottom with feed wires at either side. Obviousely part of the automatic de icing systems. It’s a bit tricky but there an electrical connector plug at the top and disconnecting this enables you to unclip the element and remove it (except that in this case one wire had been trapped at the wrong side of the coolant pipes when they had been fitted so it had to be snipped to get it out). Once out a circuit test showed there was no circuit through the element. So cutting into the two shrouded connections at each end of the element revealed some little components inside which I now know are “Thermal fuses”. One of these had “Blown”. There was a number on the side: - DF 72S which Google revealed is a thermal fuse set at 72 degrees. Although these are listed as spares in all sorts of places non was convenient to the UK. So I found a similar component at Maplins Electronics (R14) set at 92 degrees for just 69p! The reasoning being that the other thermal DF 72S fuse was still ok and the slightly higher use temp at the other end would still blow before anything melted!
By the way you cannot solder these things in so its best to use miniature screwed “block” connectors plus a good covering with insulation tape.
After putting it all back together its now been working for a month and no ice build up… The green light did still flash for a while but went out once the temperature dropped too normal freezing level.

Total cost of replacement parts was under £1 but it took a bit of time find the problem.

I had a similar problem with my E372b Fisher & Paykel. It started beeping at me and the light that indicates the lower freezer compartment would flash. I noticed that it began to occur more frequently and that the fridge compartment began to freeze on the bottom and was warm at the top so I began to suspect the fans weren't working. I decided to check out both fans myself and found both working - just by pulling the covers off - shutting the door to get them working and open the door and quickly look at them before they stopped. (They don't work when the doors are opened)
In the end I decided to ring a service technician. He came checked it out and replaced the top fan for the fridge part. He also said the bottom fan was probably over compensating for the top fan.
So if this helps it may pay to help to check the fans - and that they may slowly pack up and not work to the necessary level.

The beeping indicates something is wrong and the flashes, or the combination of flashes is a code to pin-point the source of the trouble.
I replaced the computer and a fan in my E521 frdige and it came with a list of the codes for that model.
So if my E521 breaks down (again) I'll know where to look...
Paul

Following up to my problem posted on August 28. Put a big bowl of water in freezer and wouldn't quite freeze solid. Refrigerator too cold or not cold at all. Temp gauge light flashing and beeping.

Called F& P in Hong Kong and they were extremely helpful but their diagnosis was incorrect - they said it was the defrost heater.

Turned out to be the refriderator fan. First, check if your fans are working in the refrigerator and freezer compartments. While door is open, hold a big magnet to the middle of the area where the door would close - this will activate the fan. If the fan doesn't turn on then pull the panel in the freezer and remove the fan. Test it with a multimeter. If fan is broken, get replacement one from F & P (about $65). Easy fix but difficult to diagnose unless you remove the panel.

Sorry it's taken a while to return. The problem I outlined with the my E422B has been fixed. I diagnosed the fault as the heater element. I ordered a new part and replaced it as in this case it was an open circuit heater element and not the thermal fuses. The heater element and thermal fuses come as one unit. Total cost $85AUD and my time :-).