Why is my AIWA ACD-24KBTU air conditioner blowing cold air when I have it set to heating mode?

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If your AIWA ACD-24KBTU air conditioner is blowing cold air while in heating mode, this may be a normal function of the unit, especially during the automatic defrost cycle or the preheating phase. Here are the explanations and checks to perform:

Automatic defrost cycle: In heating mode, if the outdoor unit accumulates frost (which frequently happens in cold weather), the unit automatically activates a defrost cycle that typically lasts between 2 and 10 minutes. During this cycle, the indoor fan temporarily stops. This is a normal and necessary behavior to clear the frost from the condenser and restore optimal heating efficiency. Once the defrosting is complete, the air conditioner automatically resumes heating.

Initial preheating phase: When you activate heating mode for the first time, the indoor unit requires 2 to 5 minutes to preheat before it starts blowing truly hot air. During this period, the outgoing air may be lukewarm or slightly cold. This is normal and allows the system to stabilize its internal temperature.

Check the set temperature: Ensure that the desired temperature is set to a value higher than the current ambient temperature. If the room temperature is already equal to or higher than the setting, the air conditioner will not trigger the heating function since the threshold has been reached.

Check the selected mode: Verify on the unit's display or remote control that the HEAT mode symbol is correctly displayed. Press the MODE button until you see the heating indicator displayed properly.

Filter maintenance: Dirty filters significantly reduce heating efficiency. Regularly clean or replace the filters to ensure optimal air circulation and effective heating.

If after these checks the air conditioner still does not blow warm air after 10 minutes in heating mode (outside of the clearly displayed defrost cycle), contact a professional to check that the heat pump is functioning correctly.

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