BOSCH CLASSIXX FRIDGE FREEZER – TEMPERATURE LIGHTS FLASHING

[CHRISX]

“Hello All”,

I am hoping to find out what is causing the Temperature settings lights to flash on the Temperature display on my Bosch Classixx Frost Free Fridge Freezer – Model No: KGU306005GB – this has only happened about 3 times with more than 6 Months between occurrences – but obviously something is causing it.

When the Temperature indicator lights Flash both the Freezer and Fridge lights flash in unison and produce a slight buzzing sound.

When this is happening I cannot alter the Temperature settings – pressing the adjustment button has no effect at all.

I have had to turn off the power to the appliance and leave it off for a while before turning it on again and this seems to `Reset` the Display lights / stop whatever is causing them to flash from malfunctioning.

When this happened previously I looked at the User Manual to see if this was an indicator of a Fault Code / Temperature Alarm – there was nothing mentioned about these lights flashing – or any other `Flashing Lights` information.

When these lights have Flashed previously and on this occasion the Freezer / Fridge Doors had not been opened for quite some time – not for at least a couple of hours.

I am hoping that this will be a `known problem` which can be identified without an Engineers visit ?

I think that the Fridge Freezer is about 8 – 9 Years old – but it is in excellent condition.

I want to try and find out if a component is becoming Faulty and get it replaced to prevent the Appliance breaking down and losing a Freezer full of Food.

I would really appreciate your help on this.

This is my second thread on the Forum in about 2 Weeks – the first was about Flashing Lights on my Hotpoint Ultima Washing Machine – Member / Moderator iadom very kindly helped Me with the Diagnosis of that Fault and another Member recommended EMW Electronics where I purchased a reconditioned `Main PCB` / Module which replaced the faulty one in my Machine.

This looks like my `Unlucky Month` / Year for Household Appliances as I also had to replace the Living Room TV at the beginning of May.

I am very grateful for my Membership / involvement in this excellent White Goods Forum.

Regards,

Chris

[Martin]

BOSCH CLASSIXX FRIDGE FREEZER – TEMPERATURE LIGHTS FLASHING

CHRISX wrote:I am very grateful for my Membership / involvement in this excellent White Goods Forum.

“Hello again CHRISX”

What rotten luck you are having eh, after all the problems with your washing machine. And now this….. Blimey! Annus horriblis even 🙁

Tell me, have you tried a Full defrost?

That is switch off, food/drink out, doors open and left to defrost thoroughly for 24 hrs.

Just a thought! 💡

[CHRISX]

Re: BOSCH CLASSIXX FRIDGE FREEZER – TEMPERATURE LIGHTS FLASH

Martin wrote:

CHRISX wrote:
I am very grateful for my Membership / involvement in this excellent White Goods Forum.

“Hello again CHRISX”

What rotten luck you are having eh, after all the problems with your washing machine. And now this….. Blimey! Annus horriblis even 🙁

Tell me, have you tried a Full defrost?

That is switch off, food/drink out, doors open and left to defrost thoroughly for 24 hrs.

Just a thought! 💡

“Hello Martin”,

Thanks for your message – the worst thing to happen this Month up to now was the 46″ TV malfunctioning – I could not find what I perceived to be a reputable / `Customer friendly` Repair Company so I had buy a New one – I am very irritated that the other TV might have been repairable for a reasonable price IF an inexpensive component needed replacing.

Could You let Me know what You think is causing the `Flashing Lights` scenario on my Fridge Freezer and what a `Full Defrost` would achieve in relation to the cause ?

I am assuming that even though I have a `Frost Free` Fridge Freezer there is still this `Full Defrost` procedure which would achieve something ?

I don`t really have the facility for storing my Freezer full of Food to do this.

Because these Lights have only Flashed 3 times in the last 2 Years with about 6 Months or more between occurrences it is obviously almost impossible for ME to identify what could be causing this without an Engineer / knowledgeable person already knowing of a `Known Fault` and letting Me know.

The Lights may not Flash again for 6 Months / a Year but I feel that at some point the cause will occur again and may not be able to be `Reset` – causing Me to have a Freezer full of Food which would have to be given away of thrown out.

Thanks again.

Regards,

Chris

[CHRISX]

Re: BOSCH CLASSIXX FRIDGE FREEZER – TEMPERATURE LIGHTS FLASH

“Hello again”,

Although I only posted this thread earlier Today I note that it has been read 66 times – I am guessing that this `Temperature settings light flashing` issue is NOT a `Known Fault`.

Perhaps I will get more replies.

Regards,

Chris

[SAMURI]

Re: BOSCH CLASSIXX FRIDGE FREEZER – TEMPERATURE LIGHTS FLASH

As Martin said it is best to fully defrost it as it may be ice on one of the sensors the defrost system cannot clear.

By turning it off you just reset the PCB and if it is ice on the evaporator or sensor it will not be working correctly and show as an intermittent fault.

Bob

[CHRISX]

Re: BOSCH CLASSIXX FRIDGE FREEZER – TEMPERATURE LIGHTS FLASH

SAMURI wrote:As Martin said it is best to fully defrost it as it may be ice on one of the sensors the defrost system cannot clear.

By turning it off you just reset the PCB and if it is ice on the evaporator or sensor it will not be working correctly and show as an intermittent fault.

Bob

“Hello Bob”,

Thanks very much for your reply and for the explanation about the possibility of a Sensor being affected by a build up of Ice.

As I have no way to store the Food in my Freezer at the moment I cannot carry out the `Full Defrost` process, I don`t have any Family or Friends living near Me who would have enough room in their Freezers to store my Frozen Food.

Could You let Me know where the Sensors are located within the Freezer – are they likely to be visible if looked for ?

Also could You let Me know what would happen if the `Temperature settings lights flashing` scenario happened when I was out all Day or away from Home – is it the case that the Freezer and Fridge would not be working from the moment that these lights started Flashing ?

Or is it possible that if the problem is being caused by a slight build up of Ice on a Sensor – if the Ice did clear that the Fridge Freezer would Reset itself because the Sensor could then operate – ?

I noted what You wrote about `Resetting the PCB` when powering off the Appliance and that an Intermittent Fault would not have been rectified but I cannot understand why for example any accumulated Ice on a Sensor would have dissipated when I turned the power back On a short time later ?

If any Ice was still on the Sensor just a short time after the Power Off would it not cause the Lights to still be Flashing when Power was restored ?

Also the Flashing Lights / whatever `Fault` is causing this are so intermittent that they have occurred more than 6 Months apart for the 3 times that this has happened.

I hope that Martin was not offended by Me asking for an explanation of what a `Full Defrost` would achieve – I was NOT questioning His knowledge and expertise – I just wanted to understand what His suggestion would do.

Thanks very much for your help with this.

Regards,

Chris

[Martin]

Re: BOSCH CLASSIXX FRIDGE FREEZER – TEMPERATURE LIGHTS FLASH

CHRISX wrote:I hope that Martin was not offended by Me asking for an explanation of what a `Full Defrost` would achieve – I was NOT questioning His knowledge and expertise – I just wanted to understand what His suggestion would do.

Thanks very much for your help with this

I love your posting style, totally unique in the use of emboldened type and colour highlights. Specific in your questioning yet ignoring advice given in the same way as you did with your earlier washing machine problem. Yet in the end you went with it. Déjà vue!

I will offer a final bit of advice on the subject of your errant refrigerator : Don’t try and figure too much about something you have little knowledge of but seek advice and ACT on that advice. Don’t question it, do it…..you will save yourself a lot of time and unnecessary anxiety. 😉

[CHRISX]

Re: BOSCH CLASSIXX FRIDGE FREEZER – TEMPERATURE LIGHTS FLASH

Martin wrote:

CHRISX wrote:
I hope that Martin was not offended by Me asking for an explanation of what a `Full Defrost` would achieve – I was NOT questioning His knowledge and expertise – I just wanted to understand what His suggestion would do.

Thanks very much for your help with this

I love your posting style, totally unique in the use of emboldened type and colour highlights. Specific in your questioning yet ignoring advice given in the same way as you did with your earlier washing machine problem. Yet in the end you went with it. Déjà vue!

I will offer a final bit of advice on the subject of your errant refrigerator : Don’t try and figure too much about something you have little knowledge of but seek advice and ACT on that advice. Don’t question it, do it…..you will save yourself a lot of time and unnecessary anxiety. 😉

“Hello Martin”,

Thanks for your reply.

I must explain this to You – Please don`t take offence:

I am Heating Engineer – Gas Engineer and Plumber / Heating, Plumbing & Gas Contractor – fully qualified to the highest UK level in each of these Trades and with 40 Years of experience in them.

Like MOST Engineers I have a `Enquiring Mind` for matters of a Technical nature whether during my Work or at Home and I feel that ALL technical advice should be explained to Me without any `Elitist / You know nothing Attitude` if I ask for further details.

I am not someone who is unfamiliar with working on `Appliances` / Electrical Safe Working etc. – although most are Gas Appliances.

Although I am mainly a Central Heating, Gas & Plumbing Installer I do Repair Gas Appliances for Friends and Family – when I have to replace a Part / Control I explain to the owner of the Appliance WHY it has to be done – going into technical details if necessary / requested – most of these people are not `Technically Minded` in any way – they just like to know what has happened to their Appliance.

As I have already mentioned in my messages that I am a Heating Engineer I am surprised with your comments about Me `not trying to figure out details about something that I have little knowledge about` – I find this an unusual attitude from one Engineer to another.

I hope that this experience with `Electronic Engineers` / `White Goods Engineers` on the Forum will not result in Me finding that SOME have the attitude `Don`t question what I advise` – `You know nothing` – Just do what I suggest without question` – !

What IF You / another Member had given Me incorrect advice – I ask for details BOTH to clarify in my mind the reasoning behind the suggestion and to see if other Members agree with the advice – I would suggest that this method is the best way to try and obtain Technical advice on ANY Forum.

Thank You very much for your advice to carry out a `Full Defrost` – this was subsequently explained to Me by Member SAMURI / Bob after I replied to You asking for some more details.

Regarding your other comments – I have not looked back at my thread and my replies on my Washing Machine problem but I don`t recall `ignoring advice and then going with it in the end` [words to that effect].

From the beginning I was trying to ensure that the `Main PCB` was definitely the cause of the Flashing Lights Fault and find out about obtaining either a New Programmed PCB or a Reconditioned Programmed PCB that I could fit – I accomplished this thanks to the very good advice and communication with Moderator iadom and another Member who mentioned EMW Electronics.

Regards,

Chris

[CHRISX]

Re: BOSCH CLASSIXX FRIDGE FREEZER – TEMPERATURE LIGHTS FLASH

CHRISX wrote:

SAMURI wrote:
As Martin said it is best to fully defrost it as it may be ice on one of the sensors the defrost system cannot clear.

By turning it off you just reset the PCB and if it is ice on the evaporator or sensor it will not be working correctly and show as an intermittent fault.

Bob

“Hello Bob”,

Thanks very much for your reply and for the explanation about the possibility of a Sensor being affected by a build up of Ice.

As I have no way to store the Food in my Freezer at the moment I cannot carry out the `Full Defrost` process, I don`t have any Family or Friends living near Me who would have enough room in their Freezers to store my Frozen Food.

Could You let Me know where the Sensors are located within the Freezer – are they likely to be visible if looked for ?

Also could You let Me know what would happen if the `Temperature settings lights flashing` scenario happened when I was out all Day or away from Home – is it the case that the Freezer and Fridge would not be working from the moment that these lights started Flashing ?

Or is it possible that if the problem is being caused by a slight build up of Ice on a Sensor – if the Ice did clear that the Fridge Freezer would Reset itself because the Sensor could then operate – ?

I noted what You wrote about `Resetting the PCB` when powering off the Appliance and that an Intermittent Fault would not have been rectified but I cannot understand why for example any accumulated Ice on a Sensor would have dissipated when I turned the power back On a short time later ?

If any Ice was still on the Sensor just a short time after the Power Off would it not cause the Lights to still be Flashing when Power was restored ?

Also the Flashing Lights / whatever `Fault` is causing this are so intermittent that they have occurred more than 6 Months apart for the 3 times that this has happened.

I hope that Martin was not offended by Me asking for an explanation of what a `Full Defrost` would achieve – I was NOT questioning His knowledge and expertise – I just wanted to understand what His suggestion would do.

Thanks very much for your help with this.

Regards,

Chris

“Hello All”,

If I have not alienated Myself on the Forum with My reply to Martin [message above this] – I would still like the details that I asked Member SAMURI / Bob about Please

Please see the Quote above in this message.

Regards,

Chris

[Martin]

Re: BOSCH CLASSIXX FRIDGE FREEZER – TEMPERATURE LIGHTS FLASH

CHRISX wrote:“Hello Martin”,

Thanks for your reply.

I must explain this to You – Please don`t take offence:

Chris, you don’t need to waffle on at length explaining your ‘engineering enquiring mind’ nor worry at my taking offence at your comments. My colleague and I have advised you simply empty the contents, leave the doors open to allow a full defrost then try it again. More often than not IT WORKS!

No need to know which thermistor does what, why or where? Or which lights flash or what other setting to try? Just switch it off for 24 hrs then try it again……what have you got to lose by doing that? You don’t gave to do it now as it still is usable. But choose a time when your food stock is low, that any remaining could be put in a neighbours fridge overnight whilst you do it.

Go on, try it……:wink:

[SAMURI]

Re: BOSCH CLASSIXX FRIDGE FREEZER – TEMPERATURE LIGHTS FLASH

The sensors are not visible without dismantling the appliance as they are attached to the evaporator.

It if most likely a build up of ice so it restricts the airflow so the only option is to defrost or dismantle and defrost.

As the most likely problem is an air flow problem you would get an intermitant reading on the sensors.

Bob

[CHRISX]

Re: BOSCH CLASSIXX FRIDGE FREEZER – TEMPERATURE LIGHTS FLASH

Martin wrote:

CHRISX wrote:
“Hello Martin”,

Thanks for your reply.

I must explain this to You – Please don`t take offence:

Chris, you don’t need to waffle on at length explaining your ‘engineering enquiring mind’ nor worry at my taking offence at your comments. My colleague and I have advised you simply empty the contents, leave the doors open to allow a full defrost then try it again. More often than not IT WORKS!

No need to know which thermistor does what, why or where? Or which lights flash or what other setting to try? Just switch it off for 24 hrs then try it again……what have you got to lose by doing that? You don’t gave to do it now as it still is usable. But choose a time when your food stock is low, that any remaining could be put in a neighbours fridge overnight whilst you do it.

Go on, try it……:wink:

“Hello Martin”,

You don`t try not to offend do You – comments like this are not appropriate – I have been very polite in my messages to You:

QUOTE:

`Chris, you don’t need to waffle on at length explaining your ‘engineering enquiring mind’ nor worry at my taking offence at your comments`.

END QUOTE

I was `Waffling On` BECAUSE of your comments about `You know little about this` – `Just follow the advice without question` [words to that effect] etc. and explaining that I am the kind of person who would understand the details that I asked about.

What about if I answered a question about a Washing Machine or Fridge Freezer and gave advice about something that `I know nothing about` – should the OP / Readers simply follow MY advice without question – Ridiculous !

I know that You and other Members / Moderators can be seen as very prolific `Posters` [compared to someone like Me] – so that would suggest to New Members that You are VERY experienced `Engineers` and can be taken seriously regarding your advice – but Engineers involved in many Professions OFTEN disagree on matters.

I completely understand what SAMURI / Bob has explained in His message above – this is ALL I was asking You to give Me.

Personally I DO care NOT to cause any offence to people that I correspond with.

I will be carrying out a `Full Defrost` when I get the opportunity to get to an empty Freezer and Fridge – probably not this Summer unless the Appliance malfunctions during that period.

Unfortunately my Neighbours have all changed recently and as I have spent quite a few Years working away from Home for most of the Year I do not know them well enough to even ask about storing my Freezer Food.

Thanks again for your help.

Regards,

Chris

[CHRISX]

Re: BOSCH CLASSIXX FRIDGE FREEZER – TEMPERATURE LIGHTS FLASH

SAMURI wrote:The sensors are not visible without dismantling the appliance as they are attached to the evaporator.

It if most likely a build up of ice so it restricts the airflow so the only option is to defrost or dismantle and defrost.

As the most likely problem is an air flow problem you would get an intermitant reading on the sensors.

Bob

“Hello SAMURI / Bob”,

Thanks very much for the explanation about the Sensors.

Although Martin will be irritated about Me asking more questions I must still ask You for your opinion on this point:

When the Temperature settings lights flash – both the Freezer and Fridge temperature lights – I have to turn off the Power to the Appliance – wait a few minutes and then turn the Power back On to stop the lights flashing.

If the Lights are Flashing because of a slight build up of Ice on a Sensor [on the Freezer ?] how could the Ice have gone only Minutes later with the Power Off – I cannot imagine that it melted away in that short time each time – ?

I would have thought that when I reinstated the Power the Ice would still be on the Sensor and that this would produce the Flashing Lights again ?

Also when You mention Airflow do you mean within the Fridge or behind the Appliance ? – am I correct to think that there is no Airflow within the Freezer ?

Thanks very much for your help with this.

As I wrote to Martin – I will be carrying out a `Full Defrost` in the future when I can get the Freezer Food eaten and an empty Fridge.

Regards,

Chris

[SAMURI]

Re: BOSCH CLASSIXX FRIDGE FREEZER – TEMPERATURE LIGHTS FLASH

You have airflow inside the freezer blown around by a fan.

The air over the evaporator is most likely restricted by ice giving incorrect readings for the sensors.

When you reset the PCB by turning it off it will also go into an auto defrost.

If too much ice is present then it will not fully defrost, then ice builds up slowly and sets of a warning on the display to say it is not cold enough.

When it has been fully defrosted then the defrost system should return to normal.

Bob

[CHRISX]

Re: BOSCH CLASSIXX FRIDGE FREEZER – TEMPERATURE LIGHTS FLASH

SAMURI wrote:You have airflow inside the freezer blown around by a fan.

The air over the evaporator is most likely restricted by ice giving incorrect readings for the sensors.

When you reset the PCB by turning it off it will also go into an auto defrost.

If too much ice is present then it will not fully defrost, then ice builds up slowly and sets of a warning on the display to say it is not cold enough.

When it has been fully defrosted then the defrost system should return to normal.

Bob

“Hello SAMURI / Bob”,

Thanks very much for your reply and for the information that I asked about.

I have never looked into the Freezer compartment with the Drawers removed so I had not known about the Freezer Fan / Freezer Air Circulation – I had only seen the Fridge Fan.

Having read your explanations I now completely understand the advice from Martin about carrying out a `Full Defrost` – which is why I had asked Him for more details about what the Defrost would achieve.

Martin felt that I should NOT ask these questions but just do what He advised without question.

Thanks very much to You and Martin for your help.

Regards,

Chris

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