Problem: Error codes 26 or 42 after turning on too many heating elements.
Potential issue: Damaged electronic board
Specific case: Error code 42 after turning on more than 3 elements, then already after 2, 1 until none of the cooking element could be turned on, over a period of a few weeks.
Root cause: Dying/blown electrolytic capacitor on the main electronics board.
- Turn off power (circuit breaker) - caution high voltage inside the cooktop
- Lift the cooktop out of the hole in the countertop and slide it on a flat surface
- Remove all screws around the metal housing using a torx screwdriver
- Carefully tilt the glass top out of the housing on the front, noting that there are electrical connections in the rear, and place the rear end of the glass on a stable surface. You may need someone's assistance here.
- After double-checking that there is no power, record the color coding of the four wires connected to the glass assembly (green for ground, white, black, red from left to right)
- Next open the black plastic cover by removing four Torx screws.
- Carefully remove from the connector on the left the the plastic strip connecting to the display board.
- Carefully remove the circuit board with relays and capacitors that is held in place by plastic tabs.
- If one of the capacitors is bulging out or showing sings of damage on top, replacing it may fix the appliance. De-soldering a bad capacitor requires some tools and skill. Replace the capacitor with at least the same capacity, voltage and use high-temp. 105C version) Alternatively, instead of replacing a $2 component you will have to replace the entire board.
- Reassemble and done.