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OK – All sorted. After a few hours – nothing, dead. I read somewhere about powering it down for an hour to reset it, so I did this. On power up, the usual few seconds of the compressor running, then a pause of around 10 minutes, and it’s now running properly 🙂
So if anyone gets a similar issue, I suggest powering it down for an hour and trying again!

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Replaced the heater, and all is now fine again!

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UPDATE: OK I checked for error codes, one was showing: E69. Translated to a heater problem. So I just checked the resistance across the heater, and it’s open circuit! Replacement on order.

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I just tried another 95 degree wash. The time display just jumped from 3 hours 1 minute to 1 hour 26 minutes after only 5 minutes into the cycle! It then washed for around 10 minutes, then jumped again from 1 hour 16 minutes to 40 minutes, and shortly after drained to start the rinse cycles.

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Hi Martyn

Thanks for the reply.

I wanted to find where the thermistor was for my own curiosity (sanity), but also for others who have the same problem. Good idea to fit a new one in a new location though, where we would have expected it to be!

I removed the thermistor plug and injected a signal, then traced it through the interior. I lose the signal on the lower right side of the compartment, and I can’t trace it anywhere on the rear of the compartment. They couldn’t have sandwiched it between the fridge / freezer compartments surely?!

I’m in half a mind to strip the whole b****y thing apart to find the damn thing

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Just confirmed with my meter that thermistor attached to the top of the coil is the defrost one, white outer insulated cable attached to the 5 terminal connector on the PCB with a part number label attached. The FF thermistor cable has blue outer insulation & no label.

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Thanks Dave

So I guess the red module clipped to the coil is the thermal fuse for the heaters and the white sensor is the defrost thermistor. In which case I give up. I dug a line all across the back between the fridge and freezer compartment to see if there were any wires going up from the terminal block in the freezer compartment. Nothing.

I really have no idea whatsoever where Beko have hidden the other thermistor.

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Thanks Dave

Are you saying there are frost-free fridge freezers from Beko that have just the one evaporator thermistor which is used to regulate the temperature of the freezer and the fridge compartment?

The serial number for this appliance is 1211724611

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So I just removed that thermistor. It measured 11KΩ at room temperature. I dunked it into a cup of cold water and it rose to 20KΩ, so I guess it’s a NTC thermistor. However I let it get back to room temperature and it won’t go lower than 13KΩ now unless I warm it in my hands.

Do these resistance readings sound about right for this thermistor?

Thanks.

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Hi – I shoved it in the garage to get it out of the way.

I went back to it today to sort getting rid of it, then I thought I would find the b****y sensor for my own sanity, because I never found it before and it was bugging me! Nothing to lose as I was going to skip it. So I dug a line all across the back, definitely no wires going down from the top as in similar models. Then I dug across the top after prizing off the lid. I found the wire going to the light / thermostat control, nothing else.

So out of frustration I removed the cover from inside the freezer to check where the wires were routed. OK – so I’ve enclosed a link to a photo:

https://live.staticflickr.com/65535/49845049756_6c24b45e08_b.jpg

You can clearly see here the defrost thermostat clipped to the top of the evaporator coil, but there is what looks like a thermistor also attached to the coil. Could this be it? Could it be that this thermistor is the only one in the appliance for temperature control, and there is no thermistor for the fridge compartment???

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Anyone?

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OK – So Beko confirmed item 604 on the diagram is the bung for the drainage channel in the fridge compartment, obvious now when you look at it.
They also said that if the thermistor was classed as a non-replaceable part (embedded), they don’t include it on the exploded diagrams!
So I’m back to square one. I have no idea now where the thermistor is located, and short of gradually removing all of the foam on the rear of the fridge compartment I don’t know what else to do.
Another appeal I guess to anyone who has had a similar problem and managed to locate the whereabouts of the thermistor?
Thanks.

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OK – this apparently is the exploded diagram for my fridge freezer, but where’s the thermistor?
Could it be 604, embedded between the fridge compartment and the outer metal casing?

https://siteassets.ransomspares.co.uk/ModelDiagrams/1600-1600/BEKO0721.jpg

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OK – can’t seem to edit posts?

I’ll try again with the link to the photo

https://www.flickr.com/gp/27061183@N08/28wRj2

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Well I’m back!!!

Same problem, door security light permanently lit on power-up.

Last time it was the motor brushes. This time it isn’t… The brushes are fine, moving freely in their holders & lots of life left in them. Checked the interlock, its fine. Any suggestions again anyone?!

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