B & B Heating & Cooling - Lake Saint Louis's Licensed HVAC Repair

This is a frequent issue during our hot, humid summers. It's often caused by refrigerant leaks, a frozen evaporator coil, a dirty air filter restricting airflow, or a failing compressor. Our technicians will perform a thorough diagnostic to pinpoint the exact cause—like checking refrigerant levels and inspecting electrical components—to get your cool air flowing again efficiently.

If your heat pump is stuck in one mode (only heating or only cooling), isn't reaching the set temperature, or you hear a hissing noise, the reversing valve may be faulty. This valve is crucial for switching between heating and cooling. We'll test the valve's solenoid and check for proper refrigerant flow to diagnose the issue and perform a precise repair or replacement to restore full functionality.

Proactive maintenance is key. We recommend a professional tune-up before summer and winter. This includes cleaning coils, checking refrigerant charge, testing electrical connections, and inspecting components like the reversing valve. Changing your air filter monthly also protects your system. Our maintenance plans are designed to catch small issues early, improving efficiency and preventing costly breakdowns during extreme weather.