Oven will not heat; display works, interior light works, but temperature never rises above room temperature in any mode.

Safety first: Disconnect the oven from mains power by unplugging it or switching off the circuit breaker. Allow the oven to cool completely before working inside.

• Check heating element visually: Remove the rear cover (freestanding) or back panel (built-in) to access the main heater. Look for blisters, cracks, or burn marks on the element used in Toshiba ovens (typically a circular or U-shaped element at the rear or bottom).
• Test element with a multimeter: Disconnect the element terminals. Set the meter to resistance (Ω). A healthy Toshiba oven element is usually between 15–60 Ω. If it reads open (OL) or 0 Ω (short), replace the element.
• Inspect wiring and connectors: Check the harness from the PCB to the heater for burnt insulation, loose spade connectors, or discoloration. Repair or replace damaged wires using high‑temperature oven wire.
• Check thermal cut-out / safety thermostat: Locate the thermal cut-out on the rear or top of the cavity. Test for continuity. If open and not resettable, replace it with the correct Toshiba-rated part.
• Relay/PCB check: If the element and wiring test good, the heater relay on the Toshiba control PCB may be faulty. Look for burnt solder joints or pitted relay contacts. PCB repair is advanced; replacement of the control board is usually recommended.

If you are not comfortable working with mains voltage or removing the oven from its cabinet, contact a qualified technician.