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I have fitted a new thermostat, thinking that was the problem. But it was not. Oven temperature only reaches approx. 50 deg and then indicator light goes out, even when turned on to 250 deg. Fan comes on normally, as do the other elements. Is there another cut-out switch somewhere? Has anybody else had this problem?
BTW, I did fit a new main element also, as the old one had buckled and the fan was starting to rub against it. ( They seem to be consumable item, 4th or 5th one now in 18 yrs)
Hope somebody can help, kind Regards AlRe: Smeg A42 main oven not reaching temperature
is the fan in the middle of the element turning properly ?
as you turn the stat up and down you can hear it click. set the oven to 100 degrees and wait till the light goes out. when it does if you raise the temp does the light come on againwhat I am trying to establish is what is switching off the element. if its the stat then raising the temp you will hear a click. if its set to 200 degrees and it turns off at 50 then if you lower the stat it will click. if it does not then the stat is doing its job and turning off the heat but at the wrong temp
who supplied the stat ? and what part numbers have you got ?
is the sensor of the stat in the right place?]Dave
Re: Smeg A42 main oven not reaching temperature
Thanks Dave, thermostat was supplied by servastdirect, their product code ser00076125 but I think a generic part no is 818731181. Chap had been onto Italian supplier and they said 3 different manufacturers made them, none the same but should all work. Mine didn’t have earth tag like the original but managed to put one on. Is the fan supposed to stop and start with the element clicking on and off as it reaches temperature? Yes, lights come on and off like they are supposed to, just to soon coz temperature has not been reached.
Will have another check over the weekend with your suggestions, with volt meter and an oven thermometer.
Best Regards AlRe: Smeg A42 main oven not reaching temperature
That thermostat, the real part number is 818731181 by the way, the other used to confound people, seems correct and pretty standard fare for Smeg.
If it gets to 50?C and there is heat in the oven then it may be that the cooling fan isn’t cutting in and it’s halting on an overheat, which is what I think Dave is getting to.
Essentially there are three thermostats on most of them, the thermostat that you’ve replaced that controls the user settable cooking temperature, a fan initiation thermostat that, when the oven gets to a certain heat kicks on the cooking fan and, an overheat stat that chops the heat off if activated.
If the cooling fan doesn’t kick in the oven will rapidly overheat and shut down as a safety precaution.
Hope that helps.
K.
Re: Smeg A42 main oven not reaching temperature
Ok guys, here we go. Didn’t get as much time on as I’d hoped due to family pressures. People keep wanting to cook!
So,set oven to 50 deg, seemed to warm up fine, fan working.light went out.
Set knob to 100c, light goes out,temp increases to 110c before light goes out. temp falls to 84. Light comes on, temp rises to 86 and light goes out again. ( Am using a thermocouple placed in the oven, connected to a remote reader, has been calibrated so i think it is accurate)
At this point the fan is going quite slowly.( Temp at 75c)
Increase knob to 200c, light comes on, temp goes up to 205c then light goes out.
Open the door, fan going slower, light comes on at 120c goes up to 155c, goes out.
Now the fan has stopped. Will go with a flick, but doesn’t keep going.
Turned knob up to full, 250c,fan hardly moving, light out at 210c, but temp did rise to 260c. Light on again at 183, off at 212. On at 200, off at 216. On at 197, off at 210.
Anyway, the fan hardly moves once the oven is warm so I will fit a new one. Seems to move back and forth about 6mm on its spindle. But only seems to work when oven is cold.
The oven thermostat capillary is located quite close to the element, am I right in saying it is more effected by radiant heat from the element because the fan isn’t working? The way the indicator light works makes me think the thermo controller is ok, just operating at the wrong temp.
Sorry if I’ve gone on a bit, I did take loads more data than above, but you get the general idea.
Best Regards Al
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