A- (1) Visit in the spring and (1) visit in the fall. Each visit includes: application of Micro biocide treatment on the evaporator coil to prohibit mold growth. Check of all safety devices. Check and clean drain line. Check refrigerant charge (add as necessary at additional charge). Check filters (replace as necessary at additional charge). Clean condenser coil and base as necessary. One free Diagnostic service (a $99.00 value). Preferred client status, allows your service call to be moved to the top of the service call list ahead of any non HSP client. With an HSP you will be guaranteed same day service. You also are not subject to overtime rates for after hour calls.