The capacitor controls the starting up of the motor - it won't cause the burner to cut out but if it is faulty the motor may be prevented from turning at the next command for a start. In this case I'd doubt if its faulty.
Look at the cap for swelling or burning at the end, and fitting a new one for sure won't do any harm.
John
Look at the cap for swelling or burning at the end, and fitting a new one for sure won't do any harm.
John