JLBID0906 Circular fan oven element not switching off.

[Twoten]

944171428

I have a customer complaining the fan oven gets too hot and eventually turns itself off.

It appears the circular oven element is staying on.

Can anyone confirm if the main oven uses the same sensor for fan assisted and conventional oven. The temperature for the conventional oven temperature is controlled so I am assuming if this is using the same sensor it is likely to be the control PCB that’s faulty.

[Martin]

Re: JLBID0906 Circular fan oven element not switching off.

It uses the same sensor for both fan or convection heat in the main oven.

[Twoten]

Re: JLBID0906 Circular fan oven element not switching off.

Thanks Martin,
I thought this was the case.
I guess it has to be the PCB that’s gone.

[Martin]

Re: JLBID0906 Circular fan oven element not switching off.

Twoten wrote:I guess it has to be the PCB that’s gone.

Guessing can be dangerously expensive though so I recommend changing the sensor (and connecting lead if necessary) first. The much cheaper option and if the fault remains THEN advise replacing the Control PCB in the full and certain knowledge that at least is really wasn’t the sensor….if you catch my drift? 😉

[repman]

Re: JLBID0906 Circular fan oven element not switching off.

you have not said but have you done an insulation test?
the fan element can be duff.

jim

[Twoten]

Re: JLBID0906 Circular fan oven element not switching off.

repman wrote:you have not said but have you done an insulation test?
the fan element can be duff.

Insulation test is OK, not even a slight fault.

[Twoten]

Re: JLBID0906 Circular fan oven element not switching off.

Martin wrote:

Twoten wrote:
I guess it has to be the PCB that’s gone.

Guessing can be dangerously expensive though so I recommend changing the sensor (and connecting lead if necessary) first. The much cheaper option and if the fault remains THEN advise replacing the Control PCB in the full and certain knowledge that at least is really wasn’t the sensor….if you catch my drift? 😉

I agree but I was working on the basis that according to the customer the conventional oven was working OK which suggests the sensor is OK.
Having said that I had a call from the customer to say that the conventional oven is overheating as well so that blows that idea out the window!

The other problem is it looks as if the PCB is obsolete, this has been mentioned on a couple of other threads here and it doesn’t show up on the parts list. The only option if that is the case is QER and then there’s no guarantee they can repair it so changing the probe on the off chance with a possibility it’s the board, then an additional cost to send the PCB away, have it checked to find it can’t be repaired isn’t great.

I am going to go back to this and take another look paying particular attention to the PT500 probe. Does anyone know what resistance I should expect across the probe?

[Martin]

Re: JLBID0906 Circular fan oven element not switching off.

If it’s overheating on both fan and convection then surely the answer is simply to replace the Sensor? ( part nos read = 3890818010 & 3872265008). From what you have said you need worry no further over the PCB.

….and no….I have no idea what the sensors resistance is….the manual doesn’t say.

[Twoten]

Re: JLBID0906 Circular fan oven element not switching off.

Returned to customer, she noticed over the weekend that even without the oven being selected the element in the back started to glow red.
It looks as if the supply to the oven comes on intermittently so will override the temperature setting anyway.
Being intermittent would explain why originally it worked on conventional oven and not fan assisted.
I have confirmed the PCB is obsolete.

[Author]

Posts