Preformed single system maintenance on a 2020 carrier gas system. I tested all electrical components on the inside and outside units. All tested within manufacturer specifications. I did notice the system doesn’t have a Ss1 float switch or blowout valve. Also there is a good amount of dust build up in the system, I left estimates for each item. Client stated not interested at this time. Units were cooling upon departure. Clients filter did not need to be changed at this time. 20x25x4

-Contactor -Turbo Multi Use Capacitor - 5-2-1 Hard Start Kit

Performed dryer vent cleaning. Found very large amount of lint stuck in the dryer vent. Required multiple passes to fully clear the dryer vent. Showed homeowner all the lint I pulled out.

1. Visually inspected condenser coil for leaks and abnormalities. 2. Inspected condenser fan motor, blades and bearings. 3. Inspected, cleaned, and, tightened wiring connections. 4. Measured capacitance of compressor/fan motor capacitor. 5. Inspected and measured resistance of contactor 6. Measured compressor current draw. 7. Measured condenser fan motor amp draw. 8. Inspected and replaced return filter. 9. Inspected return plenum for dust or debris. 10. Inspected evaporator coil for cleanliness and oxidation. 11. Inspected blower motor/ blower wheel for dust and debris 12. Measured blower motor current draw. 13. Measured temperature differential from supply to return. 20 degrees measured. 14. Tested drain lines for proper drainage and treated to prevent blockages. 15. Rinsed condenser with water to promote heat exchange and reduce stress on system by removing dust and debris. Capacitor on both units were testing outside of manufacturer specifications. These capacitors are liable to

1. Visually inspected condenser coil for leaks and abnormalities. 2. Inspected condenser fan motor, blades and bearings. 3. Inspected, cleaned, and, tightened wiring connections. 4. Measured capacitance of compressor/fan motor capacitor. 5. Inspected and measured resistance of contactor 6. Measured compressor current draw. 7. Measured condenser fan motor amp draw. 8. Inspected and replaced return filter. 9. Inspected return plenum for dust or debris. 10. Inspected evaporator coil for cleanliness and oxidation. 11. Inspected blower motor/ blower wheel for dust and debris 12. Measured blower motor current draw. 13. Measured temperature differential from supply to return. 20 degrees measured. 14. Tested drain lines for proper drainage and treated to prevent blockages. 15. Rinsed condenser with water to promote heat exchange and reduce stress on system by removing dust and debris. Found capacitor and contactor testing outside of manufacturer specifications. 31.7/35 on capacitor and cont

DOAS unit is still only functioning at minimal efficiency. There are still 3 fuses missing out on the CU outside. Classroom unit is cooling properly, on the CU outside I found that there is a bad capacitor 4.2/5 for the outdoor fan. Run and start amps are within manufacturer specifications.

I returned to install the warranty outdoor temperature sensor. I reset and tested the system. System is cooling upon departure.

Tested all Ptacs in cooling mode. Washed filters. Measured supply temp. Tested compressor run amps and fan run amps. Inspected evaporator coils for stuck on dust and debris. Found all ptacs with very dirty evaporator coils covered in dust and lint and in need to chemical cleaning in order to promote efficiency, performance, and longevity by reducing stress on the unit. 3a Ptac 27 bad temperature sensor 5b ptac 16 bad AA thermostat batteries 5a ptac 14 working but loud dehumidification fan

1. Visually inspected condenser coil for leaks and abnormalities. 2. Inspected condenser fan motor, blades and bearings. 3. Inspected, cleaned, and, tightened wiring connections. 4. Measured capacitance of compressor/fan motor capacitor. 5. Inspected and measured resistance of contactor 6. Measured compressor current draw. 7. Measured condenser fan motor amp draw. 8. Inspected and replaced return filter. 9. Inspected return plenum for dust or debris. 10. Inspected evaporator coil for cleanliness and oxidation. 11. Inspected blower motor/ blower wheel for dust and debris 12. Measured blower motor current draw. 13. Measured temperature differential from supply to return. 20 degrees measured. 14. Tested drain lines for proper drainage and treated to prevent blockages. 15. Rinsed condenser with water to promote heat exchange and reduce stress on system by removing dust and debris. AHU/cu 9- bad capacitor 5MFD dirty evaporator coil and blower wheel AHU/cu 10 - bad capacitor 35/5 measuri

I performed a 2 system cooling maintenance on 2021 and 2020 equipment. I checked amps, capacitors, filters, electrical, drains, cleanliness, and safeties. The systems are cooling well. I offered to install surge protection for the outdoor equipment to hopefully preserve them from potential surge damage. I offered to upgrade the unit’s filtration system to help keep the air healthier and the indoor equipment cleaner. During my thorough evaluation, I observed 2 issues. These issues are the capacitor for the blower of the upstairs unit, and the capacitor for the downstairs outdoor unit. Both of these are used to start the major electrical components and will not operate if these fail. I provided options to do these listed items during the time of service.