Are the 00d and 00e codes - meaning exactly that?
Sensor short circuit and sensor open circuit
Is this verified look up of zanussi error codes
When the sensor is disconnected - testing the continuity of it with my meter is reading too high a resistance to register. So it does not appear to be a direct short circuit within the temperature sensor itself.
The output of the control/timer is 20 V at no load with sensor disconnected. The voltage drops to 0.5 V when it is in circuit.
So does this indicate a failure of the output circuitry is not capable of driving the temperature sensor? What is the normal resistance of the temperature sensor?
I used another multimeter - the temp sensor reads 360 ohms. The oven comes with a meat probe - this reads 56k
So I guess this does suggest it is the built in temp sensor.
Incidentally plugging in the meat probe - does not help and the oven still refuses to work. Showing 00d and the fan on continuously.
The built in sensor goes up from 360 ohm cold to a max 417 ohms when in cup of boiled water.
I thought perhaps the meat probe would override the built in sensor and allow the oven to work - and I thought worked similar. It works as I would expect, as temperature increases the resistance decreases from 56k down to 10k
So it does appear that the built in probe is defective.
I am glad I checked with you since a call out man - said we needed a new control unit (which you can't get) so suggested a new oven. But I managed to find the exact control unit selling on ebay for £15 and a new sensor is £55. Either way does not look like I need a new oven.
Yes I've bought the control unit anyway. Thanks for your help. Fortunately the repair guy did not charge for coming out - since he could not fix. Unfortunate that I was away in Africa these last 2 weeks otherwise I would of fixed sooner.
You were very helpful on Saturday in diagnosing the sensor problem. However this temperature sensor seems to be an obsolete part and everywhere I find it listed says - not available. Is there anyway to get the original specification and/or find an alternative part from another oven that might work?