clock beeping F-1

[misterfixall]

hi guys ,i have a customer with maytag stove ,in middle of night, when oven off will beep f-1 this happened a few times according to customer, when cancelled would go off , customer said she could cook for 10 minutes at 400 then would go f-1. she would then cancell +start over , sometimes would work normal all through cooking time. i came over + checked it out +observed no problem,it would cycle at set temperature. i took customers word +according to f-1 the problem would be clock or touch pad. this model has touch pad +clock combined,i installed new clock ,tested for5 minutes + left. customer called me later + said new clock is beeping f-1 again like before. any ideas? the clock # is 74008108 ,by the way there is a part called auxillary relay attatched to back panel ,part number 74003482 .thanks