There could be several reasons why your window air conditioner is not effectively lowering the humidity this summer compared to last summer. Here are a few possible explanations:
Increased humidity levels: If the humidity levels in your area are higher this summer compared to last summer, it can make it more challenging for the air conditioner to remove moisture from the air. Higher outdoor humidity can affect the unit's overall dehumidification capabilities.
Unit size and capacity: The size and capacity of your window air conditioner can play a role in its ability to effectively dehumidify the air. If the unit is undersized for the space you're trying to cool, it may struggle to handle the cooling and dehumidification demands, resulting in reduced performance.
Maintenance issues: Over time, window air conditioners can accumulate dirt, dust, and debris, which can impact their performance. A lack of regular maintenance, such as cleaning the air filters and coils, can hinder the unit's ability to remove humidity effectively. It's recommended to clean and maintain your air conditioner regularly to optimize its performance.
Operating conditions: The way you operate the air conditioner can affect its dehumidification performance. For example, if you set the temperature too low or constantly switch the unit on and off, it may not have sufficient run time to dehumidify the air effectively. It's best to set the thermostat to a comfortable temperature and allow the unit to run continuously for better dehumidification.
Internal issues: Internal components of the air conditioner, such as the compressor or fan, could have developed faults or inefficiencies that are impacting its dehumidification performance. In such cases, it may be necessary to have a professional technician inspect and service the unit to address any underlying issues.
If you're experiencing a significant difference in dehumidification performance between two summers, it may be worth considering these factors and troubleshooting accordingly. It's also advisable to consult the manufacturer's instructions or seek professional assistance if necessary.