i60 indicates the programme completed without heating.
You would need to have, and be able to use, a multimeter to test the heater, temperature sensor and wiring.
If these all test ok, it only leaves the main control board as the likely suspect.
It may be worthwhile taking out the control board and checking the printed circuit board for obvious damage or dry joints.
This board is in the door and it's easier to check this than to gain access to the components below.
Check it out, see what you find.
If the heater is open circuit, you need to replace it.
You should get a high resistance in the kohms scale for the temperature sensor.
Hope this is of some help
Let me know how it goes or if you need more help