[JeffreyDoujon]

Re: Help needed with NEFF B1920 oven

Hi All

Thanks for the replies

I found a Bimetallic Thermal switch (150C) in my lab today so fitted that in place of the standard TOC
I placed a thermocouple on the mounting surface (accuracy +-2 C maybe) and a RTD in the oven (accuracy less than 0.5 C) and fired it up results were:-

Setpoint Temp RTD
100 C 98.7 C
150 C 138.3 C

200 C 185 Heat Off
180 Heat On

220 C 198 Heat off
194 Heat On

250 C (max) 232 Heat off TOC Temp TC 96 C
235 peak
230 Heat on

I’m a little confused as the TOC that was removed was rated 180 C and Neff state 130 C for this model, however 130 seems OK from the above ANy comments on this ?

I will grab the megger and test the element but it looks like it was a faulty TOC

Jeff

[JeffreyDoujon]

Re: Help needed with NEFF B1920 oven

Hi KWatt

Thanks for the reply

The TOC seems to be a bimettalic type not a thermal Fuse
I suppose the damage could be due to opening under the 10A load becuase of a faulty thermostat
I think I’ll replace the element and the TOC and then check the thermostat with my thermocouple

Jeff

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