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Good afternoon all,
thank you again to all who help on this site as it has saved me a fortune over the years.
The problem I have this time is that my very old (15yrs ish) Electrolux freezer keeps running with the red fault light on and doesn’t respond to the temp adjuster on the front panel. Freezer is running at -30c or colder but that’s all my thermometer reads down to.
I am assuming there is a temp sensor to tell the freezer to turn off but would value all advice available.
I really don’t want to add to the white goods mountain of broken things as being an engineer it’s in my blood to fix/repair.
Model EU1323T
prod no. 922727768
serial number 13100139many thanks for any advice given
Jez
can only be the probe or the board
probe is still available
https://shop.aeg.co.uk/fridges-freezers/fridges-freezers/feet-housing/refrigerator-probe/p/2425071285
board is obsoleteDave
you can normally measure the resistance of the sensor at a given temp but there is no tech info to tell me what to expect probably due to age
it does say if there is a total failure of the sensor the board flashes 3 lights and goes into timed mode
Dave
Sound More like the board as it’s a solid red light, no flashing.
I’ll have it apart and check the sensor and look at the board and see if somethings given up. Other than that it may be time to lay it to rest. 🙁
I appreciate the info again
Jezelectrofix wrote:try unplugging the sensor and see if it goes into timed mode
Dave
Will do Dave thanks, I’ll let you know!
Morning Dave,
so yesterday I took the lid off and disconnected the sensor. The freezer is now flashing red fault light and seems to be working in timed mode.
the sensor measured 2.02K ohms at about 10c before switching back on. Circuit board appears ok visually with no burnt components or dry joints that I can see.
I checked it during the day and got these
2.07@4c
2.44@-7c
2.46@-13c
2.55@-22c
have I lucked out with a sensor problem?
thanks
Jezone long shot
dont know the board but the main compressor will either be controlled by a triac or a relay
if this component has failed it wont alow the board to turn it offDave
Hi Dave, looks like the board is triac controlled.
if the board registers a solid red fault like with continuous running with the sensor plugged in and timed running with the sensor unplugged and flashing red fault light can we assume it is out of range on resistance?https://drive.google.com/file/d/18Gi1FmH51dhPMrgaFLgrYpbvY-yBeTX7/view?usp=drivesdk
https://drive.google.com/file/d/18HX2MLWZh-cjCyw9txeGqKkeTeGXtdGX/view?usp=drivesdk
https://drive.google.com/file/d/18AV_hZcoQGBX0_KwV-VSrjsP7XybMiCz/view?usp=drivesdkvery likley but you can never be certain because we have not tech info
normally we get resistance values based on temp
your reading doen’t seem to move much.from your reading the resistance goes up with temp going down
if it was me i would try adding a 1k res in series and see what happens better still if you could get a 5k lin potentiometer and ajust it 10 degees at a time and leave it an hour each timeunless you want to take a chance on the sensor
Dave
Thanks again Dave.
I had a look over the board with my x10 and found a dry joint on one leg of the triac so will reflow that then work on adding resistance.
I’m assuming I’m reconnecting the sensor but adding the resistance inline to increase the reading given to the board and see if the freezer shuts off?
https://drive.google.com/file/d/18V8YudJ5BUL2WQtfGfS0gz-9pQL_SNYP/view?usp=drivesdkJez
correct am trying to see if the resistance was higher then is the board capable of controlling temp
find the right resistance and it may be ok
Dave
Hi Dave, I didn’t have a variable resister so I ripped some resistors of an old CB I kept and threw in a 14k ohm no joy, solid red light as before and cooling down past -22c
46k turns off the fault light and the freezer was at 2c this morning but that could be natural cooling down not maintained.
i have both running in series to see what happens next.
some of the old american freezer tables suggest nearly 80k ohms for around -15 ish but connecting 2 46k in series didn’t start the compressor.
this is all with the temp control dial set at -18c.Jez
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