Re: Hotpoint wf310
Looks like the feathered one may be correct now that you have eliminated all the simple possibilties. The module is quite expensive but is covered under the five year parts warranty, might be best to pass it to Hotpoint, or send the module to EMW/QER for repair.
A few different eeproms used on these, Hot & Cold fill or Cold only. Make sure you get the full model number and serial number to ID correctly.
Jim.
PS. A quick visual check on the module usually reveals blown triacs, a real pain in the butt to get out now that it is stuffed down at the bottom. 😥