Troubleshooting a no A/C call on a Lennox heat pump system system. Unit blowing air but not cooling. Found outdoor unit running, but fan only. Compressor was not running. Shut down power and checked capacitor. Found 45/5 dual run capacitor bad on compressor side (45). Replaced capacitor with new, under warranty, and tested system. Refrigerant levels ok. And system clean. No other issues found on system.