The heating element, thermostat, timer, and control panel are the main points to inspect in such failures.
If the oven does not reach the required temperature or the microwave no longer heats as before, the problem may be in the heating element, thermostat, or control panel. In some cases, the door lock and safety system can also prevent normal operation.
Trying to repair these appliances without proper knowledge is risky. Professional inspection helps identify the correct part, ensures safe repair, and restores stable performance.