Inaccurate temperature – NEFF U1661

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  • January 19, 2015 at 7:17 pm #83809
    Dave_Neff
    Participant

    I’ve been suspicious that both ovens are no longer getting to the set temperature so have just checked with an oven thermometer – it shows 20-30 degrees colder than the setting in each oven. I’m going to try the thermometer in another oven ASAP but I suspect it’s telling the truth.
    Are there any calibration adjustments on the temperature controls?
    Any suggestions on what to check?

    Dave

    January 19, 2015 at 7:24 pm #423796
    Martin
    Participant

    Re: Inaccurate temperature – NEFF U1661

    In order to establish a correct temperature reading the thermostat needs to cycle (on and off) at least twice,. Better still three times then check the thermometer. Most cheap oven thermometers are less than accurate and the laser type much more useful.

    January 19, 2015 at 7:33 pm #423797
    Dave_Neff
    Participant

    Re: Inaccurate temperature – NEFF U1661

    I left each oven on for at least 25-30 minutes with the thermometer in it, the “heating” must have cycled a few times in that time and I’d hope that the thermometer would get up to temp too. I understand the problem with cheap (presumably bi-metal) thermometers but I suspected a problem beforehand from an under-cooked turkey and roast pots. I’ll check it in another oven, which has been in use for 15+ years and is renowned for being “hot”.
    Is there any cal adjustment?

    January 19, 2015 at 8:54 pm #423798
    Martin
    Participant

    Re: Inaccurate temperature – NEFF U1661

    Most U1661’s use and electronic PTC sensor rather than conventional stat so not adjustable. What is the full model number (ENr no) of the oven anyway?

    January 19, 2015 at 9:01 pm #423799
    Dave_Neff
    Participant

    Re: Inaccurate temperature – NEFF U1661

    Thanks for your interest. The E number is U1661 N1 GB 09.
    It’s unlikely that both thermocouples would have failed at the same time (unless the first one became dodgy a while ago and I didn’t notice) so I probably need to check connections. I’m an electronics engineer so don’t have a problem tackling problems like this but lack of info is the problem.
    I’ll probably have to investigate whether it’s possible to hire a suitable calibrated thermometer 🙁

    January 19, 2015 at 9:50 pm #423800
    Martin
    Participant

    Re: Inaccurate temperature – NEFF U1661

    Buy a laser/infra red thermometer,

    January 21, 2015 at 1:01 pm #423801
    Dave_Neff
    Participant

    Re: Inaccurate temperature – NEFF U1661

    Having thought about it a bit, to use an IR thermometer with any accuracy I’d need to make some targets with a bit of thermal mass (metal) and a 95{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} surface emissivity (exhaust paint) so I can open the door and get a reasonable estimate of the temp. I didn’t know about digital meat thermometers (with a remote probe) until yesterday – probably an easier and cheaper approach if I can find one with good reviews and that has a high-enough top temp – manufacturing quality is an issue from the reviews I’ve seen so far.

    January 21, 2015 at 1:51 pm #423802
    Martin
    Participant

    Re: Inaccurate temperature – NEFF U1661

    I think you are putting to much theory into this TBH. Establishing the temperature is a really simple exercise. A £15 IR thermometer is all that is required.

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