Neff oven thermostat problem

[johnatfarnham]

Does anybody know where a compatible oven thermostat can be obtained for a Neff double oven cooker. This is an old cooker and the E-Nr number 195.303 852 does not now register with any spares supplier. The top oven and grille within it ceased to work. From the temperature regulator switch there is a wire which runs to the thermostat which was an inch long device which had been solders to the end of this wire. From the other end of the thermostat another wire had been soldered and the end of this wire was connected to the oven heater element. I disonnected both ends of this wire and bypassed the thermostat to prove that the heater element was not faulty and indeed it worked which proves the thermostat is not working. But where, oh where, can I find another thermostat. The one that was in there was insulated with a rubber cover and then inserted into a small metal tube mounted on the back of the top of the oven This is a fan oven and the switch shows a temperature range up to 180C. Can anybody tell me where to find a replacement thermostat or at least a compatible one and if it is one that is just a probe how should it be wired.?
Johnatfarnham

 

[Specialist]

Hi John: Try www.ukwhitegoods.co.uk if not listd in the Online shop then either leave them a message or contact them via telephone on the number provided. They should be able to source you a compatible element.

Hope that helps.

 

[johnatfarnham]

Hi John: Try www.ukwhitegoods.co.uk if not listd in the Online shop then either leave them a message or contact them via telephone on the number provided. They should be able to source you a compatible element.

Hope that helps.

Thank you the expert at Ammanford Wales. I have unfortunately tried UK Whitegoods | Appliance Spares, Forums, Help And Advice and they can only suggest that Neff are the people who should have the thermostat required. Following that I enquired of BSH Appliances who I understand are effectively Neff/Bosch and as they cannot find the E-Nr No on their system they also cannot help. It would seem my only hope is finding somebody who has a compatible thermostat which is not exactly of the probe type, or somebody who has some old stock. It grieves me that I might have to fork out £500 for a new cooker when a thermostat costing perhaps £20 or so would solve the problem. Has anyone any suggestions please

johnatfarnham

 

[Geordie Spark]

Have you tried eSpares?

(google eSpares for the link)

 

[johnatfarnham]

Have you tried eSpares?

(google eSpares for the link)

Hello Geordie Spark and thank you for your suggestion. I have however tried eSpares and as they cannot trace the E-Nr number on their system they cannot help. Within the last hour it has been suggested to me that the device used on my oven is a diode which I understand it something electronic which I have absolutely no knowledge of. Could this be so and if so where do I get one? There are markings on it which say "Patented microtemp 9138 LXJQ 228C" Does this mean anything to anyone?
johnatfarnham

 

[Specialist]

Hi John: Sorry UK Whitegoods could'nt help you with your part, apart from the E-NR number on the appliance is there any sort of Model code on it ? Also you mention a Diode, could you possibly post up a picture of the item in question for us to have a look at.

 

[johnatfarnham]

Hello the Specialist from Ammanford South and thank you so much for your suggestions. It would seem that I have got it all wrong as I was speaking to someone who rang me back following a message that I had left on his voicemail and who is a spare part supplier of apparently long standing. I have been confusing the oven thermostat with a thermal cut-out. When I described the device to him his first words were "oh that is a microtemp" and on it in very small writing only readable with a magnifying glass it does indeed say "microtemp 9138 LXJQ 228C" This I understand now means that if the oven overheats at something over 228 degrees centigrade the thermal cut-out cuts off the current to the oven heater element. It can only be used once and has to be replaced but he said that he could provide one at 229C which should be OK but would I check first with an oven thermometer to see if it is overheating which if it is would mean that the thermostat is faulty. I then found the proper thermostat behind the panel at the back of the oven, the panel having first to be removed. I am assuming that if the thermostat is faulty then there should be no difficulty in finding a compatible one which would suit the oven. I'm sure that the Specialist would have similarly identified the part if as was suggested I sent a picture of the item for him to look at
I would like to thank all those who have taken the trouble to try and sort out the problem which in the first instance was my fault for wrongly identifying the part involved. I hope others will benefit from my mistakes and thank you all once again. This is an excellent site; people are so helpful
johnatfarnham

 

[Marvo]

Some of those thermal cut-out'sare manually resettable. Is there a button in the middle of it? Sometimes the button is hidden under a screw-on cover or sometimes it's somewnat recessed so you need a small screwdriver to press it and reset it.

 

[johnatfarnham]

Thanks Marvo from as far as Cape Town !! I've just had a look at the cut-out and there is no facility to reset at all. I understand that a replacement is only about £1 so I should have no difficulty in replacing it. I'm told however that although the present one is soldered to the wire at each end it is better to crimp it to the new one in case the heat from soldering opens the circuit. The existing one is only 4mm wide and 10mm long. Thanks very much for your help.

 

[Marvo]

No probs, a replacement will be cheap but resetting is always worth a try.

Cape Town's only far if you walk there

 

[ringer]

To the Op (johnatfarnham) can you post the picture up here so we can all see? We know you solved your problem, but it would be good to get a look at the device in question - every day is a schoolday - and it might just be me looking inside an oven next time wondering what that device might be.

 

[Specialist]

Hi John (OP) Glad to hear you've found out what the part is, Microtemps can be a pain in the backside at times. Please do me 1 favour: When you Crimp new connectors onto the wires, make sure that they are the right size for your wire. They're normally Red terminals but on a few i've had to use Blue & make sure you get a good crimp on them, your best bet would be a ratchet crimper if you have access to 1.

 

[johnatfarnham]

Thanks the Specialist at Ammanford South. I will make sure that I use the correct crimps and they are tight. I do have access to a ratchet crimper. By the way I have run the oven to check the temperature at 180C and it seems to go up to about 190C before it cuts off the current to the heater element. Does this mean that thermostats are not that accurate to say 10 degrees?. Also the fan seems somewhat reluctant to start as on one occasion it started very slowly before gathering speed. I suspect that heat and oil do not go together but would one spot of oil on the bearing help or does the fan unit need changing? It did stop on one occasion when the current was cut off to the element but since then it has continued to run as the heating element cycles on and off. I have the oven out of the housing and standing on a workmate so that I can see the back of it and test the current with an electricians screwdriver.
Regards
johnatfarnham

 

[Specialist]

Hi John: If the Fan is'nt running reliably then that could be the cause of your original problem, repair with this type of motor really is'nt that good an option to be honest. The motor could properly for maybe a day or week but then fail totally causing even more problems than you have at the moment, best to change it while you have the oven out of the Housing.
Please make sure that while you have the back off of the oven it is TOTALLY ISOLATED from the Electrical supply.

 

[stuart569]

Thanks the Specialist at Ammanford South. I will make sure that I use the correct crimps and they are tight. I do have access to a ratchet crimper. By the way I have run the oven to check the temperature at 180C and it seems to go up to about 190C before it cuts off the current to the heater element. Does this mean that thermostats are not that accurate to say 10 degrees?. Also the fan seems somewhat reluctant to start as on one occasion it started very slowly before gathering speed. I suspect that heat and oil do not go together but would one spot of oil on the bearing help or does the fan unit need changing? It did stop on one occasion when the current was cut off to the element but since then it has continued to run as the heating element cycles on and off. I have the oven out of the housing and standing on a workmate so that I can see the back of it and test the current with an electricians screwdriver.
Regards
johnatfarnham

Was this on just one occasion where the fan struggled to start up or every time?I would of thought the fan would wait til the element heats up before kicking in fully?Just a thought

 

[Specialist]

Was this on just one occasion where the fan struggled to start up or every time?I would of thought the fan would wait til the element heats up before kicking in fully?Just a thought

On the Majority of Fan ovens the fan comes on fully from the start of cooking.

 

[johnatfarnham]

Thanks again to the Specialist from Ammanford South. Yes I am wondering if it would be preferable to replace the fan and am at the moment trying to get it off. The problem is that the nut on the centre of the fan is extremely tight but with a bit of luck I will move it. Thank you also for the warning. I am extremely careful when working with electricity being well aware of the dangers. When I do work on the oven the electricity supply is completely isolated. Thanks again
Regards
John H

 

[Specialist]

Your welcome John, please let us know how you get on. Have you tried a little bit of WD40 on the nut & let it penetrate for a while ? You may find that a good pair of long nosed pliers holding the shaft is useful too.

 

[ringer]

To the Op (johnatfarnham) can you post the picture up here so we can all see? We know you solved your problem, but it would be good to get a look at the device in question - every day is a schoolday - and it might just be me looking inside an oven next time wondering what that device might be.

Whilst you've got the oven out John, how about a piccy or two of the components in question?

 

[johnatfarnham]

Thanks ringer. I will try and put in a photo of the micro temp but I have already tried twice without success. I know that I have learnt a great deal since I set out on this exercise Success !!! I also managed to find a 229C micro temp and have decided to change the fan which was being a bit erratic. All being well I will have a working oven by mid next week.

jo hnatfarn