On 11/23/2016 7:44 AM, John G wrote:

the 150 reverted to default 170 again. Eventually my wife gave up on
dealing with this and carried on with Circotherm
which was working properly.
Later during a conversation with our son, he suggested turning off the
oven at
the mains and leaving it off overnight. I didn't give this much hope but
tried
it anyway. Low and behold the oven settings are now back to normal, the
heating digit lights immediately and the chosen temperature setting is
maintained.
This may not work for everyone but it is worth a try before committing to a
hefty call out fee.


This solution works for many electronic devices. Computer, phone,
sewing machines, modem, cable box, etc. Overnight is not needed,
usually 15 seconds is enough.