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I have this No frost freezer (service number 997606601) and every few months the temperature rises from -18C to -12C. If it is manually defrosted then it works Ok again for another few months. Other posts indicate that this is a defrost heater problem.
I believe the freezer can be put into service mode to poll for component problems. I cannot find a service manual for this freezer to check how to get it into service mode and also how to interpret the codes it returns in the display.
Can anyone help as I am reluctant to bin it. A local service engineer was not able to help as he was not au fait with the electronic control system used in modern freezers.
Thank you.
Re: Liebherr GSN 3326-26A
Hello, putting this appliance in to service mode and from there in to defrost mode, wouldn’t tell you anything, unless you had a plug in energy meter and could gauge the power that the appliance was drawing and therefore if the heat circuit was good.
There is no fault code for heat circuit faults, just for sensors.
If components on the heat circuit fail, then the temperature would be higher than -12.
-12 would suggest that there was no fan operation. So, the likely scenario is that the fan is becoming blocked with ice and when you manually defrost it, you’re freeing the blockage, allowing the fan to work again properly.
I’d use the engineers search facility on this site to find an engineer that can handle this type of appliance.
Hope this helps.Re: Liebherr GSN 3326-26A
Thank you for your quick response ELDAR59. I would like to determine if the defrost heater element is OC or if it is a PCB control component problem – relatively easily rectified. It would help to get a circuit diagram so I can identify each component that may be U/S, individually test to track down the problem and rectify. I guess Liebherr do not provide diagrams for commercial or liability reasons, so am stuck at present.
In my experience economic repair by calling in Liebherr service engineer is not a practical proposition as I have been quoted large sums with no guarantee that the freezer would continue for another year. Disappointing really considering their good reputation for top end product and the price I paid for it.
If anyone can point me to the circuit diagram for this freezer I would be grateful.
Thank you again.
Re: Liebherr GSN 3326-26A
Hello, you haven’t got a problem with your defrost heater.
If you had, then after defrosting manually, your problem would re occur in a couple of weeks or so at the very most.
I’d be willing to bet that the problem doesn’t lie with the defrost circuit at all, or the pcb, but is a more physical problem, resulting in the fan not working.
Where are you based? Have you tried the engineer search facility? If that proves unsuccessful, you could always call liebherr and ask them for their recommended engineer in your area.Cheers.
Re: Liebherr GSN 3326-26A
Thanks again ELDAR59 for your response.
The bottom line is that I have given up on trying to use this freezer so it is now sitting in my garage. I invested a lot of money on this one as LIebherr was recommended as reliable. Now I am without a freezer as we cannot again have contents defrosting because of this regular problem.
We are at the moment living without a freezer – buying fresh most days and using the fridge.I do not have the money to engage an engineer, but do have time and ability to track down the problem, buy and fit any necessary spares. I have 40 years experience in mechanical and electrical engineering so have some competency for repair – my first job was in a domestic appliance repair shop many years ago.
However, I do seek the basic information needed to diagnose the fault, i.e. a circuit diagram to show components and locations and preferably some details of how to remove the evaporator casing without smashing the plastic panels so it will go back together again.
If you can help with these specific requests then I would very much appreciate, but I cannot employ and engineer to fix this.
Re: Liebherr GSN 3326-26A
It’s obvious that you’re competent with electrics/electronics but I can almost guarantee, even from here, that the problem is not with the heater, but in terms of probability, more than likely associated with the fan.
That is not say that the fan itself is faulty, but at certain times it’s becoming impeded.
To look at the evaporator, you need to remove the clips on either side, underneath at the front.
This will allow the evaporator housing to swing down and you can remove the top insulation piece and inspect components inside.
From memory the heater can’t be replaced, instead the whole evaporator has to be changed. With respect, this job would be beyond even the most competent DIY-er.
Hope this helps you, but I would switch the appliance on and wait until the fault presented itself and inspect it in its fault condition, otherwise we’re just guessing.
Of course, you can check the integrity of the heater, but as I’ve said before, that won’t be the problem.
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