Miele KF 7542 SN F4 Code

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  • #97711
    good1231
    Participant

    Hi all hope you are having a good Friday, in the past week my fridge freezer has seemed to be giving me issues.

    It beeps and ‘F4’ is displayed on the screen. I normally press some buttons and it goes back to normal but not today. Any idea on what I can do please? The temp in both fridge and freezer seem fine and whenever I can the see the screen display the temp it reads is normal. Is there any simple fixes I can do?

    I did read about switching it off for 24 hours and that will resolve all sensor issues but I don’t think I can do that, I have too much food in the freezer lol and this weather does not help. Thanks all 🙂

    #469124
    electrofix
    Moderator
    #469125
    good1231
    Participant

    electrofix wrote:since miele fridges are made by Liebherr then read page 15

    https://home.liebherr.com/external/products/products-assets/HAU_BA_B2B_708450900_en_2019-02-18-05-08-05/708450900_en.pdf

    Dave

    Thanks Dave. This just says to contact customer service.

    #469126
    electrofix
    Moderator

    oh i know that but it tells you its a sensor problem and the reason its still functioning is because its designed well enough to have an emergancy plan when thing go wrong
    I dont know which sensor because i have no access to tech
    hopefully one of the fridge boys may know which one

    Dave

    #469127
    good1231
    Participant

    electrofix wrote:oh i know that but it tells you its a sensor problem and the reason its still functioning is because its designed well enough to have an emergancy plan when thing go wrong
    I dont know which sensor because i have no access to tech
    hopefully one of the fridge boys may know which one

    Dave

    aha thanks Dave appreciate it! I think it is the evaporator sensor – will wait for someone else to confirm. Is it worth replacing, ignore or replace the fridge freezer?

    #469128
    electrofix
    Moderator

    depends on the sensor price but i would think its worth trying with the build quality of this unit

    Dave

    #469129
    good1231
    Participant

    electrofix wrote:depends on the sensor price but i would think its worth trying with the build quality of this unit

    Dave

    Agreed thanks Dave!

    #469130
    Tony R
    Participant

    Yes Freezer evaporator sensor, but I will need your index number, found just after the model number to identify parts used on that years production.

    #469131
    good1231
    Participant

    Tony R wrote:Yes Freezer evaporator sensor, but I will need your index number, found just after the model number to identify parts used on that years production.

    Hi Tony, thanks for the reply! I think the Index number is 75/58552648 or 25D 165

    #469132
    Tony R
    Participant

    Hi, I cannot find an index 25D-165, but two versions of a KF7542SN are listed on index’s 25A-165 and 26C-165, both have the same freezer evaporator sensor part number 9590214 a replacement for the original 6942092 sensor, priced at around £50.00 plus VAT and any carriage.

    #469133
    good1231
    Participant

    Tony R wrote:Hi, I cannot find an index 25D-165, but two versions of a KF7542SN are listed on index’s 25A-165 and 26C-165, both have the same freezer evaporator sensor part number 9590214 a replacement for the original 6942092 sensor, priced at around £50.00 plus VAT and any carriage.

    Thanks Tony, is it easy to replace? Dave did suggest to replace as opposed to buying a new fridge freezer what do you think?

    #469134
    Tony R
    Participant

    Yes,
    it probably comes as a kit, locate and pull out old sensor from bottom of the coil, cut off a length of the old sensor and using a length of the new sensor ( cut to size about 6 inches longer than the length you cut the old one, join back up with the kit. before you do any cutting check the joining kit as they did two versions, one with an insulated box and 2 crimps and a screw together version, the screwed together version needs to be located outside the fridge/freezer behind the black condenser plate, the insulated/ crimp version can be left inside the freezer neatly located with the other cables.
    You will have to remove the housing around the coil to get the sensor out, unscrew and remove the small square thermal fuse in the polystyrene, gently lift up the evaporator coil and rest it by inserting one of the glass shelfs so you can now see the back of the coil assembly, cut the tape on both sides and you will find a couple of pressed in metal lugs, gently ease these out and the cover will come off exposing the coil for sensor removal, reassemble in reverse. TAKE CARE when lifting or moving the coil as it is connected to delicate aluminum pipes.

    #469135
    good1231
    Participant

    Tony R wrote:Yes,
    it probably comes as a kit, locate and pull out old sensor from bottom of the coil, cut off a length of the old sensor and using a length of the new sensor ( cut to size about 6 inches longer than the length you cut the old one, join back up with the kit. before you do any cutting check the joining kit as they did two versions, one with an insulated box and 2 crimps and a screw together version, the screwed together version needs to be located outside the fridge/freezer behind the black condenser plate, the insulated/ crimp version can be left inside the freezer neatly located with the other cables.
    You will have to remove the housing around the coil to get the sensor out, unscrew and remove the small square thermal fuse in the polystyrene, gently lift up the evaporator coil and rest it by inserting one of the glass shelfs so you can now see the back of the coil assembly, cut the tape on both sides and you will find a couple of pressed in metal lugs, gently ease these out and the cover will come off exposing the coil for sensor removal, reassemble in reverse. TAKE CARE when lifting or moving the coil as it is connected to delicate aluminum pipes.

    Morning Tony! so its just a matter of replacing the old with the new but leaving more wire etc? can you please send me a link for the replacement part-just want to make sure I get the correct one? Thank you!

    #469136
    good1231
    Participant
    #469137
    Tony R
    Participant

    No its a 9590214 you require, you need the correct part as the resistance is set for the PCB to recognize the temperature correctly, don’t go cheap, buy the right one or your unit will not run correctly.

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