Performed a 5 system spring maintenance ( AC/ electric heat). Tasks performed. 1. Visually inspected condenser coil for debris/ dirty. 2. Inspected condenser fan motor. 3. Inspected condenser fan blades. 4. Inspected/ cleaned wiring connections. 5. Tested compressor/ condenser fan motor capacitor. 6. Checked refrigerant pressures. 7. Checked compressor amp draw. 8. Checked condenser fan motor amp draw. 9. Inspected / replaced return filter. 10. Inspected return plenum for debris/ dirty. 11. Inspected evaporator coil. 12. Inspected blower motor/ blower wheel. 13. Checked blower amp draw. 14. Measured temperature differential . 15. Inspected drain lines. 16. Washed condenser unit. Recommendations Unit #6 - blower cleaning- very dirty blower wheel. Will cause undue wear and tear on the motor. Unit #7 - contactor testing at very top end of acceptable range 10-20ohms. Reading 20 ohms indicating that this contactor is likely to fail Unit #32a- contactor reading low- 5/7.6ohms Unit #32B- bo