E-2400 blower fan turns off mid burn

[mojamboo]

Last week our blower fan started going off mid burn. Tried turning off and on unplugging blower turning back on. Thought blower motor was dead till turned on computer and it turned on again. Worked fine for a week now mid high burn last night turned off computer still on just no blower. Celenoids click and work just not the blower. We had a new computer while it was still under waremtee in 2012? Now my local dealer wants to come do testing they can't diagnose with me over the phone. They are 2hrs from here so it won't be soon.  Last night I left the boiler on no blower just to see what happened and it's now running fine again this morning. I just want to diagnose the problem first then figure out why the problem occurred. They mentioned stray voltage getting to the board. After 6 years would this really be the problem? Thank you for any help you can give