Microwave displays H0 or "H0t" and will not start a new cycle immediately after heavy use.

Safety: Allow the microwave to cool before further use.

Steps:

• Open the door and let the microwave sit idle for 10–20 minutes to cool down.
• Ensure that all vents are clear and that there is adequate space around the unit.
• After cooling, close the door and try a short cook cycle.
• If H0 appears frequently with normal use, the cooling fan motor may not be running properly or the thermal cutout may be overly sensitive and require replacement.

Note: Persistent overheat warnings should be evaluated by a technician to prevent damage or fire risk.