When a hot wok stops responding, the first check is whether it has been overcrowded. Too many ingredients can cool the wok severely and shift the cooking process from stir-frying toward stewing.
Reduce the batch before diagnosing a heat problem
The cook should remove excess ingredients and cook in smaller batches. After reducing the load, the next question is whether the food again behaves like a stir-fry rather than a stew. If it does not, crowding may not be the only issue, and the heat source or equipment may need a separate check.
Overcrowding is the first documented cause to eliminate, not a guaranteed diagnosis. A smaller batch tests whether the amount of food was suppressing the wok’s heat.
Check oil timing separately
Sticking does not by itself prove that the wok has lost heat. The cited guidance recommends preheating the wok before adding oil to reduce sticking.
If the wok is already preheated but extremely hot, the heat can be reduced and the wok allowed to cool a little before the oil is added. This is a separate check from batch size: an overcrowded wok may be too cool, while a preheated wok may need a brief cooling period before oil is added.
What the cook must still confirm
The cited guidance does not provide an exact temperature, preheating time, oil quantity, burner setting, or visual indicator for judging whether a wok is responding correctly. Those details must be confirmed separately through the cook’s own equipment and experience.
If reducing the batch does not restore stir-frying behavior, the cook should also verify that the heat source is operating and that the wok is sitting correctly on it. A failure to ignite, an uneven flame, or heat loss unrelated to crowding falls outside the two checks described above.
The practical sequence is straightforward: reduce crowding first, then reconsider oil timing. Neither check should be treated as a diagnosis of damaged equipment or a mechanical fault.