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While replacing our oven I’ve taken the opportunity to take a look at a problem with our ceramic hob, with electronic control circuitry.
It’s an Electrolux EHS 601P, prod no 941.592.714.
There was a problem with the beeper not sounding. I dismantled the unit and re-soldered the connections to the beeper. Reassembled, turned it back on – success – beeper sounding.
Tried to turn the hob on, but hit a problem in that there was immediate relay chatter and the LED displays flashed in time with it. The control circuitry does appear to be working in that the decimal points on all the displays flash at the correct speed.
I’ve traced the circuit and tested some voltages (with multimeter, not scope). The main control relays are chattering as the unregulated supply is dropping from about 25v to 12v in time with the chattering. The 5V supply looks solid.
Why are the displays flashing in time with the relay? It would be unlikely that they are driven from the unregulated supply – is it possible that the control line to the relay driver is chattering?
The control module has two boards, top board has code 629.888.01, lower board has code 629.892.02. There is a patch wire soldered between the negative side of the relay bridge in the PSU to ground plane connection on the other board.
Is this a known fault with simple fix? Is the control unit readily available and at what cost? Would I be better to just get another hob? Time is of the essence – cooking for a family of 6 is a problem with no hob!
Hugh
Re: Electrolux ceramic hob relay chatter
The price of a new control board was £130 + VAT.
I ended up getting a new flush ceramic Matsui hob at £180 which was a drop-in replacement for the Electrolux. Not a lot more, and guaranteed to work – I might have knackered a new control board.
Anyone interested in spares from the Electrolux hob? All the elements are in good working order.
Hugh
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