S&A Heating & Air | Local HVAC Services in Seagoville, TX

In our climate, a failing reversing valve often shows up as your system struggling to switch between heating and cooling modes. You might notice it blowing cool air when set to heat, or warm air when set to cool, especially during our mild but variable shoulder seasons. Other signs include unusual hissing noises or a complete loss of heating/cooling function. If you're experiencing this, it's best to call for a professional diagnosis to prevent further strain on the system.

Given the dusty conditions in our area, we recommend checking your standard 1-inch pleated filter every 30 days and replacing it at least every 60-90 days for most homes. If you have pets, allergies, or ongoing construction nearby, monthly changes are crucial. A clogged filter is the most common cause of HVAC issues here, as it restricts airflow, makes your system work harder, and can lead to premature failures and higher energy bills.

Absolutely. For heat pumps, which are common in our area, proper airflow is critical for both efficiency and operation. A severely clogged filter restricts this airflow, which can cause the system to overheat and shut down on safety limits. It can also lead to ice buildup on the coils in cooling mode and prevent the system from reaching the desired temperature. Often, what seems like a major repair starts with a simple filter change—it's always the first thing we check.