What Causes No Airflow in Air Conditioning Heating Mode?
1 Answers
There are primarily two reasons why an air conditioner may not blow air in heating mode: 1. During winter operation, the air conditioner requires a preheating phase. The outdoor unit starts first, and the indoor unit begins blowing air only after the pipeline temperature rises - this is the anti-cold air function. 2. After running for some time, the outdoor unit enters defrosting mode (typically lasting about 10 minutes), during which the indoor unit stops operating. Main reasons for insufficient heating include: 1. The 8-12 minute "defrosting" period required when outdoor temperatures drop below 0°C causes immediate frost formation on the outdoor unit, which some users mistakenly interpret as poor heating performance. 2. Improper user operation or maintenance. 3. Power voltage fluctuations or drops during periods of high electricity consumption. 4. Possible refrigerant deficiency requiring professional servicing. Most users employ heat pump or hybrid (heat pump + auxiliary electric heating) systems. 5. The unit's heating capacity being insufficient for the room size - solutions include using room dividers or curtains to reduce space; avoiding AC use below -5°C and switching to auxiliary heaters or wall-mounted boilers; avoiding peak electricity hours. 6. Outdoor temperatures below -5°C significantly reduce heating efficiency as lower temperatures progressively diminish the system's actual heating capacity.
