Completed maintenance on a heat pump split system. Checked all electrical components for proper volts and amp draw. All components are within factory spec. Dual capacitor tested ok. Heat kit tested ok. Changed supplied filter. Split temp above 19 degrees. Found biogrowth in airhandler. Cleaned and sanitized airhandler cabinet. Pulled blower assembly and treated. Installed a pure x uvc light system with life time equipment warranty. The pure x has a 3 year bulb life. Re assembled and tested . System clean and operating normally at this time.