Oven interior light and fan run, but there is no heat in any mode.

Safety first: Turn off power at the breaker. Testing supply voltage should be done only by qualified persons.

Step-by-step checks:

• Check breaker pair: Ensure both breakers (for a 240V circuit) are on and not tripped.
• Measure supply: Have a qualified person measure voltage at the oven's terminal block. You should see full line voltage across the two hot legs.
• Inspect thermal cutoff: Locate and test any thermal fuse or high-limit thermostat for continuity.
• Check main relay: If supply and thermal devices are good, the main heating relay on the control board may not be closing.

When to replace parts: Replace a tripped thermal fuse or repair supply issues. If all external causes are ruled out, replace the electronic oven control board.