no power to feed motor keystoker a90

a friend of mine has a keystoker a90 and lost power to the feed motor. the combustion blower runs and the blower motor kicks on when you push the button on the bonnet but has no power at the feed motor with the t-stat on or with the timer on still no juice at feed motor. not sure where to start. thanks

Start with a meter...at the motor terminals
it may be getting power...but motor could be bad.
....no power there...then check each junction ( if any)...
...check fuses/breakers etc...
...determine FIRST if indeed the motor is getting power or not!

done that its not getting power he stuck a cord on it and plugged it in the wall and the motor works fine.

Then check that circuit all the way back to its "source"...wether it be limit switch or T stat relay or panel etc...all junctions...EVERY thing...
.....how did he plug it into a wall anyways????
did he METER where it was plugged into on his furnace??

Does ur stove have a "high-limit" switch???

... 1 more thought...
.... are there 'pins' in the timer??
.... I know this is an obvious question... and may seem silly to you... but sometimes it is the obvious things that can get overlooked... if there are... then I would meter the timer and check the contacts

Is it a Direct Vent (Power vent) type stove, check the FLUME Switch on the back, if it tripped, it may have to be Manually reset. it has a LITTLE tiny Button in the middle of it. On some stove it will trip the feeder or the whole unit.

looks like this.
http://www.fieldcontrols.com/pdfs/46086800.pdf