Responded to service call for outdoor condensing unit producing loud whining noise during cooling operation on 10-year-old system. Performed diagnostic evaluation using refrigerant manifold and micron gauge to assess system pressures, temperatures, and overall performance. Upon inspection, measured operating pressures and superheat/subcooling values to determine if mechanical components were functioning within manufacturer specifications and to identify source of abnormal noise from compressor or fan motor assembly.

Responded to callback for HVAC system not working following planned maintenance visit. Performed load calculations using EDS Load Calculator, determining cooling load of 26,255 BTUh and heating load of 60,295 BTUh with required heating airflow of 532 CFM. Inspected mechanical room equipment and plumbing connections to verify system operation and documented conditions for service records.

Completed installation of 3-ton, 19 SEER heat pump system including outdoor condensing unit and indoor air handler. Mounted air handler horizontally in attic space with proper clearances, installed new flexible ductwork throughout attic with secure fastening and connections, and positioned outdoor unit on ground-level pad against exterior metal building wall. Ran refrigerant lines, condensate drain piping, and electrical connections between indoor and outdoor equipment, ensuring all components were properly secured and operational per manufacturer specifications.

# HVAC System Replacement Estimate Summary Responded to on-site service call to evaluate existing HVAC system for replacement. Conducted comprehensive assessment of outdoor condensing unit and indoor air distribution components. Exterior inspection revealed aging air conditioning condenser positioned on concrete pad adjacent to building structure, with existing refrigerant line set, electrical disconnect, and junction box requiring evaluation for replacement compatibility. Indoor assessment documented return air grille placement and existing ductwork configuration within conditioned space. Photographed current equipment installation, refrigerant piping routing, electrical connections, and indoor air handler access points to develop accurate replacement specifications. Provided Red-level priority estimate for complete system replacement with A+ equipment tier recommendations based on current system age, condition, and customer requirements for improved efficiency and reliability.

# Service Report Responded to no-cooling complaint on 15-year-old residential HVAC system. Customer reported thermostat set to 66°F but interior temperature remained at 72°F with warm air blowing from vents. No tripped breakers, no ice buildup on evaporator coil, and system fan operational. Upon arrival, conducted diagnostic assessment of split system located in attic space. Inspected air handler unit with spray foam insulated mechanical room and verified adequate airflow through return vent at floor level. Performed system evaluation including refrigerant pressures, electrical components, and airflow measurements to identify root cause of cooling failure on aging equipment. Given the system's age at 15 years and no-cool condition, provided customer with repair options and recommendations for restoring cooling function to residence with no secondary cooling source available.

Completed planned maintenance on an 8-year-old HVAC system under Platinum Level service agreement (first annual visit). Replaced 24x24x4 filter and documented significant corrosion with moisture accumulation at panel seams, indicating potential refrigerant leakage. Inspected utility room configuration including water treatment systems and associated ductwork to ensure proper system operation.

Responded to no-heat call for 15-20 year old Lennox Elite Series furnace located in damp basement environment. Upon inspection, discovered severely rusted blower motor assembly consistent with prolonged moisture exposure, preventing proper system operation. Replaced blower motor assembly, tested all connections, and verified complete system functionality with proper heating output restored.

Performed annual Platinum Level maintenance on a Lennox system with a Smart S40 thermostat. Inspected control board (PN:107069-01, FW:1.81.5064) and verified all connections were secure. Confirmed Wi-Fi connectivity was functioning properly with successful connection between thermostat, network, and server.

Diagnosed complete system shutdown on 4-year-old HVAC unit with no airflow through vents. Inspection revealed faulty control board causing communication failure between thermostat and air handler. Replaced control board and verified proper system operation, restoring heat functionality and airflow throughout the home.

Performed comprehensive assessment of existing HVAC system where furnace is operational but AC unit has failed completely. Conducted thorough measurements of the installation space and documented structural elements to prepare accurate replacement estimate for complete system upgrade. Customer seeking full system replacement rather than repair options.

Completed Platinum Level maintenance on 5-year-old HVAC system, including replacement of 16x25x5 filter. Performed electrical diagnostic testing with multimeter, verifying system voltage at 49.16V and inspecting control board connections. All components functioning within normal parameters.

Performed warranty service call on outdoor HVAC system (Job #405281626). Diagnosed issue with contactor requiring replacement; system currently operational while awaiting OEM part. No additional helper needed for follow-up repair.

Completed platinum level maintenance on 6-year-old HVAC system (second annual visit). Replaced 20x20x5 filter, inspected internal components including air handler and ductwork connections, and documented system condition with photos. System is functioning properly with some normal dust accumulation; renewal recommended.

Completed monthly maintenance service on 3-year-old system according to Platinum Level maintenance protocol. Replaced 16x25x5 filter, inspected internal components including copper lines, electrical connections, and fan assembly. All systems operating within normal parameters with no issues detected.

Completed Platinum Level maintenance service on a 4-year-old HVAC system. Replaced heavily soiled 16x25x2 filter and performed electrical diagnostics using Fieldpiece SC440 multimeter, confirming 2.5μA reading at the control board. This was the second annual visit; renewal is recommended.

Completed annual planned maintenance on Lennox HVAC system (installed 8/1/25). Verified proper operation of control interface, confirmed remote diagnostics functionality was enabled, and checked that alerts/notifications were properly configured. System is operating within specifications; no filter replacement needed at this time. Customer declined service renewal.

Performed comprehensive Gold Level maintenance on 5-year-old HVAC system during scheduled second annual visit. Inspected furnace electrical components and connections in basement installation, noting normal wear on circuit board and wiring. Examined outdoor condenser unit electrical systems, confirming proper operation with no visible deterioration. Replaced 20x20x5 filter and advised customer that service agreement renewal is due.

Responded to no heat complaint on 5-6 year old system that had been working intermittently before failing completely. Upon inspection, accessed electrical control panel and conducted multimeter testing of furnace components. Diagnosed electrical fault causing system failure with no airflow through vents. Repairs completed and system restored to proper operation.

Responded to customer complaint of intermittent heating issues with Ruud gas furnace displaying error code 5L. Diagnostic testing revealed flame sensor malfunction causing system shutdown during operation. Cleaned flame sensor, verified proper ignition sequence, and confirmed consistent flame detection. System now operating normally with no error codes during extended testing.

Performed routine maintenance on dual HVAC system. Identified need for 16x20 polarized filter housing for basement unit, which should be covered under existing Platinum Level warranty. Unit is approximately 3 years old with all components in working order.