Fix / Split System AC — Outdoor Unit / Not cooling

AC (outdoor) not cooling?

A failed compressor cannot pressurize refrigerant, so no heat transfer occurs between indoor and outdoor units.

• Hermetic Compressor

  Call a Pro Part: $250–$600

• Condenser Coil

  Moderate DIY Part: $200–$500

  A fouled condenser coil cannot reject heat to the outdoor air, causing refrigerant head pressure to rise and cooling capacity to collapse.

• Expansion Valve

  Call a Pro Part: $40–$120

  A stuck or faulty expansion valve disrupts refrigerant flow rate, preventing proper evaporation and heat absorption indoors.

• Four-Way Valve

  Call a Pro Part: $60–$180

  A leaking or stuck four-way valve can cause refrigerant to bypass the correct circuit, mixing hot and cold lines and eliminating cooling.

• Control Board

  Moderate DIY Part: $100–$280

  The outdoor control PCB governs compressor and fan operation; a fault can prevent the refrigeration cycle from running.