Yeah, that's kind of what I was thinking happened. It still works just the fan is on high constantly. Thanks!Harman convection and combustion blower motors speeds are variable,and speeds are changed by changing the voltage.The exhaust probe is the key to the convection blower,if your fan setting is on high,the blower will ramp up in stages to max.Sounds like the voltage spike from your problem took out the triac,on the control board.
Yep same in stove and room temp. It works and does what it is supposed to do just the distribution fan is on high constant. No off either.I was thinking a bad potentiometer on the control board, Try it in both stove & room temp, mode. Mine went out last week have to run in stove mode until new pots get here.
There is a 99% chance you could cheaply repair your old board,and keep for emergencies.However,I think you will find the new board has better programming,and your stove will run better and cleaner.I ended up buying a new board. It had some other issues with it not turning off as well. It's all good now. I asked if they had a record of when I bought the thing September 2008.
It does seem to run better than it did before. I think the board was going bad either way being it wouldn't turn off unless you left the hopper door open.There is a 99% chance you could cheaply repair your old board,and keep for emergencies.However,I think you will find the new board has better programming,and your stove will run better and cleaner.