Safety first: Isolate the oven from mains. Elements operate at full mains voltage.

Steps to check:

Remove the oven back panel (after pulling the oven out) to access the top heating element terminals.
Inspect the wiring for burns, melted insulation, or loose connectors. Tighten or replace spade terminals as needed.
Disconnect the element and measure its resistance. A typical Gram top element is between 20–60 Ω. If the meter shows OL (open), the element is faulty.
If the element tests good, check for 230 V AC at the element terminals when the oven is commanded to heat (this test must be done by a competent person with power restored). If no voltage is present, the relay or PCB is likely defective.
Replace the upper heating element if open, or the main control board if it fails to supply power.

Warning: Live voltage testing is hazardous. If you are not trained, do not perform energized measurements; call a technician.

Oven shows E4 and heating elements do not energize.

Possible Causes