忽冷忽热 (hū lěng hū rè): It's fluctuating between cold and hot (adjective/phrase) — Meaning & Stroke Order

This air conditioner keeps fluctuating between cold and hot; we need to have a technician thoroughly inspect it.

The fluctuating nature of international relations has introduced uncertainty to global trade.

His attitude towards friends is hot and cold, making it hard to understand.

The market conditions are fluctuating, and investors need to remain cautious.