Question about Smeg Cooktops
Hob shows signal like a hyphen and it beeps every 20 secs tried turning it of and on via mains no joy
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Posted on Jan 02, 2017
SOURCE: Stoves 700CTH hob
Hi, this worked for me as well on a 900CTH. Has to be a design fault judging by the number of people with the same problem.
No idea what this capacitor does but a guess would be that it is the reset circuit for the processor. This is normally a simple CR circuit which holds the reset pin down so the processor resets on power up. Only in this case their design does not hold the pin down long enough hence increasing the capacitor from 220 to 1000 micro-farads increases the time constant so that the pin is held down long enough. The installed value probably works well initially but due to the heat on the hob the capacitor ages, capacitance decreases in value (a common issue with electrolytics) and low temperatures at start up exhibit lower capacitances hence the fault is, as reported, worse in cold conditions. So my additional advice would be to pick a replacement with a high temperature rating.
Posted on Apr 07, 2010
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