I have an APM 6855 fridge/freezer…the fridge started playing up last week though the freezer was fine…H showing instead of temperature..i looked at many sites and forums etc and the general concensus is that this appliance is garbage!…i didn’t know which way to turn what with the freezer being fine…i then noticed an article by a lad called Gary based in Durham who claimed the problem was simple to rectify…i phoned him and through his help my fridge is now working exactly as intended..the fault is caused by the “no frost radiator sensor”(probe) ..a new one was purchased for £19 and it was fitted in less than 20 mins,the freezer has to be thoroughly defrosted during this procedure…had it not been for these forums i would have been out of pocket to the tune of app £350 for a replacement…if you are reading this Gary cheers!