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Siemens engineer examined the replacement appliance. He put the replacement appliance into some sort of diagnostics mode. It passed the tests. There was no BUZZ when compressor was stopped & started a couple of times.
It would perhaps seem the buzz only occurs when the compressor has been off for a longer duration such as 25+ minutes in normal operation.
Audio recordings and other info emailed to the factory.
Received replacement appliance today. Unfortunately, it makes the same buzz, may be a bit longer in duration 🙁
The Bosch FD 9901 batch number (equates to Jan 2019 production date according to google) is the same on both ratings plates.
The Jiaxipera compressor barcode/serial number is 21 digits long. The final 11 digits are totally different between both compressors. I think the last six digits ‘may be’ a YYMMDD date code. If I’m right, there may be a 4+ week difference in production dates Sep’19 vs Oct’19.
Just an update. Bosch engineer confirmed it shouldn’t buzz for a second when the compressor starts, and he thought it is likely to be the compressor. Next step is to arrange for the new appliance to be replaced/exchanged by the retailer.
KGN34NW3AG appears to be fitted with a TG8112Y compressor made by Jiaxipera.
The loud buzz sounds like it is coming from the compressor to me. I’m no expert, but after studying the following video which explains how a single phase induction motor works, I think may be the compressor is not starting properly?
The Bosch starting device 12010592 has an awful lot of terminals on it.
I think I’ll have to speak to Bosch/Currys 🙁
Re: Bosch ‘No Frost’ vs ‘Frost Free’ query
I had a look at spare parts diagram for KGN34NW3AG on Bosch website, and as far as I can tell, the only difference I could see between this and our 20 year old bosch, is the evaporator and heating elements have moved from the rear to the top of the freezer compartment. I assume the newer models still perform an automatic defrosting cycle.
Re: Bosch KGU3201GB/05 Defrost problems …
Just an update from when I last posted almost 18 months ago.
I can confirm reprogramming the Bosch to use Timed Defrost (P11, CF) mode seems to have solved the issues we have witnessed in previous years where the evaporator would be clogged with ice usually after each summer.
Also, contrary to my previous post, the high temperature warning alarm does sound if the temperature rises above -15C, usually after putting a large quantity of food into the freezer compartment.
I’ve not had to replace the original NTC sensor.
Re: Bosch KGU3201
Is it a repetitive fast clicking?
Does the noise stop when you open the freezer door?
If yes, perhaps it is coming from the fan at the back of the freezer compartment and there is ice build up near the fan blades.
The fan can be seen at the back of the compartment if you remove the top freezer drawer.
A picture of the fan can also be seen here with the rear inner wall removed:
http://www.ukwhitegoods.co.uk/forumsphpbb3/viewtopic.php?f=35&t=60815Re: BOSCH (FRIDGE) FREEZER TEMPERATURE PROBLEM
Your appliance looks like a smaller version of my old KGU3201.
http://www.bosch-home.co.uk/store/spareparts/RefrigeratorFreezercomb/KKU3301TR/51
Dare I suggest defrosting the freezer compartment overnight, and then observe whether the symptoms return within a few weeks?
If your appliance is behaving like mine used to do, I found I had to defrost the blocked evaporator every early autumn following a ‘hot summer’ otherwise the temperature alarm kept going off.
http://www.ukwhitegoods.co.uk/forumsphpbb3/viewtopic.php?f=35&t=60815
Re: samsung SRL3616B has power but doesnt refrigerate/freeze
Does this help?
http://www.ukwhitegoods.co.uk/forumsphpbb3/viewtopic.php?f=35&t=33802
Re: Bosch KGH39V03GB Fridge not cooling freezer fine.
Unless a Bosch expert can correct me, it looks to be all mechanical operation. No radio waves or magic. I believe the temperature is sensed by the long thin metal tube you can see in the photo. Thermal expansion/contraction would appear to cause the device to adjust the flap opening accordingly.
I would think if the fridge compartment is ‘too warm’, the flap should be wide open to allow as much cold air to enter the fridge compartment when the fan is spinning. If it is ‘too cold’, the flap should be closed to reduce the cold air flow.
When the flap is open, I would think you should be able to feel the cold air come into the fridge compartment if the fan is running correctly and provided there are no other blockages in the duct due to ice.
(If you have not already worked it out, I think the fridge door switch is located near the temperature/control panel. Just push it in to simulate closing the fridge door. The internal light should go off too)
Re: Bosch KGH39V03GB Fridge not cooling freezer fine.
I believe the temperature regulator/thermostat is an all mechanical device.
If there is no ice blocking the duct, then it does suggest the fridge thermostat is perhaps faulty as you had suspected.Some photos I have googled of said unit:
Re: Bosch KGH39V03GB Fridge not cooling freezer fine.
There is a temperature regulator operating what looks like a flap in the fridge compartment if you look at page 3.
KGH39V03GB/02 (The /01 model is probably identical)
http://www.bosch-eshop.com/eshop/bosch/gb/prodp.htm?prod=KGH39V03GB{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d}2f02&ESHOPTYPE=AI would also check the fan is working when the compressor is running (eg. turn on Super Freeze if available). There appears to be a fridge door switch which probably switches off the fan when it is opened.
Light dusting of frost should also build up on the evaporator if it is freezing.
But as it is still covered under extended warranty, just call Bosch to come and fix the appliance if you find a manual defrost fails to resolve the problem.
Re: Bosch KGH39V03GB Fridge not cooling freezer fine.
Did you inspect the evaporator unit in the ceiling of the freezer compartment to see whether it is perhaps blocked with ice?
The solution may be as simple as requring a manual defrost to clear the ice. (See user instructions)
fyi, Bosch appliances come with a 1 yaer warranty which is extended to 2 years if you had registered the appliance shortly after purchase.Re: Zanussi ZX79/5SI fridge compartment not cooling
fwiw, perhaps worth locating and checking the fan is working?
http://www.justanswer.com/uk-appliance/55c4n-zanussi-zx79-5-fridge-doesnt-work.html
Re: 70/30 Appliance Cabinet Door problems
fwiw, the gap between the upper and lower doors on the actual appliance usually provides a small margin to accomodate slight variations where the split appears between the upper and lower kitchen unit doors. Did you take this into consideration?
Most base unit kitchen doors I’ve come across are 715-720mm. Ikea perhaps use 700mm doors.
eg. this Beko has a 84.5mm gap between the two doors shown on page 18.
http://www.beko.co.uk/manuals/BC73F.pdf
