Question

________blows cold air.

1. Air conditioner
2. Hair dryer
3. Heater
4. Cooker​

Answer 1

Explanation:

Air conditioner

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Answer 2

Answer:

Your furnace may be blowing cold air because the filter is too dirty. A dirty air filter blocks airflow over the furnace's heat exchanger, causing it to overheat. When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so that the heat exchanger does not crack.