When the fan stops working try taking your fist and whack the blower motor. If it starts back up then it is usually a bad spot in the motor which would then need replacement. You can also try removing the motor and hot wire it to see if it works fine. If it does not then replace, if it does reinstall and check for loose connections.

 

Blower fan motor can be easily tested in car by using a jumper wire, see thread:

https://www.hondaaccordforum.com/for...accords-59744/