Responded to after hours dispatch for outdoor fan motor failure on one-year-old condensing unit. Performed diagnostic evaluation of electric heat pump system and identified faulty condenser fan motor preventing unit operation. Inspected indoor evaporator coil assembly and refrigerant lines, noting significant moisture accumulation on equipment room floor indicating potential condensate drainage concerns that require monitoring. Provided customer with repair options and system status assessment.

# Installation Summary Completed refrigerant conversion and component replacement on a 3.5-ton mobile home HVAC system, transitioning from R-410A to R-22 refrigerant specifications. # Work Performed Recovered all existing R-410A refrigerant from the system using recovery equipment per EPA regulations. Removed the existing R-410A thermal expansion valve (TXV) from the evaporator coil assembly and installed a replacement R-22 compatible TXV rated for 3-5 ton applications. Accessed the liquid line and removed the existing filter drier. Installed a new liquid line filter drier with appropriate brass fittings to ensure proper filtration and moisture removal from the refrigerant circuit. Brazed all connections using nitrogen purge to prevent oxidation and contamination of copper tubing. Performed vacuum procedure on the complete system to remove moisture and non-condensables. Pulled system down to 500 microns and held vacuum to verify system integrity and absence of leaks. Charged th

# Diagnostic Summary Responded to customer complaint of air conditioning system running continuously without adequately cooling the space. Upon inspection, found HVAC system exhibiting significant age-related deterioration with heavy oxidation on copper refrigerant lines and extensive rust and corrosion throughout the evaporator coil assembly. Connected Fieldpiece digital manifold gauges to measure system pressures and temperatures. Readings indicated abnormal operating conditions with pressure at 244.4 PSIG and temperature reading of 793°F, suggesting potential refrigerant charge issues or compressor malfunction. The heavily corroded evaporator coil and deteriorated condition of refrigerant lines are likely contributing to reduced heat transfer efficiency and poor system performance. Service valves showed signs of age but remained accessible for testing. The extensive corrosion on internal components, combined with abnormal operating parameters, indicates system is operating well bey

Responded to customer callback regarding HVAC system concerns. Performed thorough inspection of attic-mounted air handler unit and associated ductwork. Documented current installation conditions including metallic supply ductwork, flexible return duct connections, and condensate drain piping. Verified equipment labels and specifications were intact. Assessed insulation placement around ductwork and between floor joists. Photographed system components to provide visual documentation of current installation status and address customer's questions about the ongoing situation.

Completed comprehensive estimate for full HVAC system replacement of failed 4-ton unit. Existing system deemed non-operational and beyond economical repair. Documented current attic installation conditions including deteriorated flexible ductwork, compromised insulation coverage, and outdated equipment configuration to provide accurate replacement specifications and scope of work required.

Responded to cooling complaint with indoor temperature at 80 degrees. Upon inspection of the HVAC system, accessed the mechanical compartment and examined refrigerant lines, valves, and connection points for potential refrigerant loss or system deficiencies. Documented equipment condition with photos showing copper refrigerant piping, valve assemblies, and internal components for further diagnostic assessment and recommended repairs.

Responded to service call for upstairs unit that stopped cooling. Performed comprehensive leak search on upstairs HVAC system and completed annual cooling maintenance inspection. Installed return air filter and verified proper airflow through return air grille. Inspected flexible ductwork in attic space, examining interior insulation and verifying structural integrity of duct connections. Replaced air filter at return air vent and ensured proper system operation upon completion.

# Condensate Pump Installation with Safety Controls Completed installation of condensate pump system with dedicated drain pan and float switch for HVAC air handler unit located in attic space. Mounted condensate pump assembly adjacent to existing air handler, ensuring proper positioning for gravity drainage from unit into pump reservoir. Installed dedicated safety drain pan beneath air handler to capture overflow or leak conditions. Integrated float switch into pan as secondary safety control to shut down system operation in event of primary drainage failure or pump malfunction. Wired float switch into unit control circuit to interrupt compressor operation when activated. Routed black insulated refrigerant lines and white PVC condensate discharge piping according to manufacturer specifications. Secured all piping and tubing to floor joists using appropriate fasteners to prevent movement and ensure proper pitch for drainage. Connected condensate drain line from air handler coil to p

Completed installation of 3-ton condenser unit on exterior concrete pad with proper electrical connections and refrigerant lines. Integrated new outdoor unit with existing ductwork system in attic space, including flexible duct connections and metal transition pieces to ensure proper airflow distribution throughout the structure.

Performed second opinion evaluation of existing HVAC system located in crawl space. Assessed condition of flexible ductwork with reflective insulation, rigid metal ductwork components, and air handler unit. Documented system configuration including return air register, vertical and horizontal duct runs, and overall installation quality. Provided estimate recommendations for complete system replacement based on inspection findings.

Completed comprehensive AC maintenance including system cleaning and inspection for member customer. Performed electrical diagnostics using clamp meter, verified capacitor operation and connections, and inspected blower motor assembly. Changed out air filters with customer-supplied replacements on site. Customer has separately ordered a new thermostat for future installation.

Responded to no-power complaint on 2019 Carrier 3-ton system with 2-stage compressor and 2-stage fan. Customer reported AC failed to restart after power was disconnected three times during plumbing work to relocate sewer drains in 60-year-old home. Performed diagnostic inspection and confirmed no power present at thermostat. Inspected attic-mounted air handler, ductwork, and associated electrical components. System components showed age-appropriate wear consistent with attic environment installation. Identified power loss issue related to multiple power interruptions during concurrent plumbing modifications.

Responded to service call for AC unit experiencing short cycling issues. Performed diagnostic inspection of HVAC system, measuring supply air temperature at floor register (60.2°F) and inspecting air handler unit with connected ductwork and refrigerant lines. Documented system condition including deteriorated duct insulation at connection points and overall equipment configuration for further evaluation and repair recommendations.

Completed comprehensive inspection and cleaning of two commercial Trane HVAC systems. During inspection, identified significant frost and ice accumulation on air handler unit indicating potential refrigerant flow issues, airflow restriction, or thermostat malfunction. Performed diagnostic evaluation of affected unit, inspecting evaporator coil, refrigerant lines, condensate drain system, and associated piping components including PVC drainage with ball valve shut-off. Conducted additional diagnostic work on cooling system to determine root cause of icing condition and assess overall system performance. Cleaned accessible components and documented equipment condition with photographic evidence for maintenance records.

Responded to callback for secondary drain pan overflow causing ceiling water damage. Performed airflow measurement using manometer to verify system operation. Conducted internal plenum inspection with telescope camera to check for active water intrusion and confirm no water was overflowing the primary drain pan. Documented existing water damage to ceiling and wall, including brown staining and deterioration. Inspected drain pan area and found evidence of prolonged moisture exposure around drain line penetration through substrate. Verified proper drainage and system function to prevent further leakage.

Completed estimate for installation of dehumidifier system in attic space with existing HVAC air handler and spray foam insulation. Assessed equipment placement requirements, electrical connections, and integration with current ductwork configuration to provide customer with comprehensive pricing for humidity control solution.

Responded to no cooling complaint on residential AC system approximately 4 years old. Upon inspection, found evaporator coil completely frozen with extensive ice buildup throughout air handler cabinet. System history indicates refrigerant additions in 2021 and 2023, plus capacitor replacement in 2023, suggesting chronic refrigerant leak losing charge approximately every two years. Verified low refrigerant pressures using manifold gauges, with suction pressure reading 31°F and abnormal system temperatures confirming undercharge condition. Documented frozen coil condition with photographic evidence showing severe frost accumulation on evaporator and surrounding surfaces. Recommended system leak detection and repair to address underlying issue causing repeated refrigerant loss rather than continued recharging.

Installed Amana 2.5 ton evaporator coil at residential property per purchase order J3671-001. Unit was picked up from Jackson location on Mammoth and successfully installed adjacent to existing outdoor condensing unit positioned along red brick exterior wall. Installation completed with system operational and ready for service.

Performed comprehensive AC system cleaning and inspection. Removed access panel to examine electrical control components, tested voltage and amperage readings using digital multimeter to verify proper system operation, and utilized refrigerant manifold gauge to measure system pressures and temperatures across all zones. Interior components showed minor corrosion on housing which was noted for monitoring, wiring connections were inspected and found secure, and all electrical readings confirmed system operating within normal parameters.

Conducted comprehensive assessment of 13-year-old Rheem HVAC system to provide replacement estimate options for air handler or complete system replacement. Documented existing attic installation including dual metal air handling units, flexible ductwork configuration, and supporting infrastructure. Recorded detailed measurements of plenum, ductwork sections, and return air components for accurate equipment sizing and replacement specifications.

Responded to commercial property for reported ceiling leak initially assessed by plumber as HVAC-related issue. Upon arrival, unit had been shut down to prevent further ceiling damage. Performed diagnostic inspection of rooftop HVAC system and identified condensate drain line blockage with visible debris accumulation at drain pan outlet. Inspected drain pan and confirmed standing water present due to restricted drainage. Cleared blockage from condensate line, verified proper drainage flow restored, and confirmed no additional leaks from refrigerant lines or coil connections. Advised that unit can be safely returned to operation with drainage system now functioning properly.

Provided estimate for coil cleaning service to remove buildup from evaporator coil and plenum area, along with installation of dual bulb UV light system to prevent future biological growth. Member discount of 10% will be applied when services are performed.

Installed Amana 4-ton evaporator coil in attic space with complete ductwork integration. Retrieved equipment from Jackson Supply per purchase order J5138-001. Connected new coil to existing air handler unit with properly sealed metal supply plenum and rigid ductwork. Configured flexible metallic duct runs throughout attic space with appropriate insulation wrapping and secure mounting straps to ensure proper airflow distribution and energy efficiency.

Completed spring AC maintenance per membership agreement. Performed comprehensive system inspection including electrical connections, refrigerant pressures, and overall unit operation. Customer reported intermittent noise when unit shuts down; monitored system through multiple cycles but unable to replicate issue at time of service. Checked condenser fan motor, compressor operation, and contactor for abnormal sounds during shutdown sequence—all operated within normal parameters. Verified refrigerant charge using manifold gauges, inspected wiring connections at contactor and capacitor for signs of arcing or loose connections that could cause audible clicking. Requested customer obtain video documentation if noise recurs to assist with diagnosis. All system parameters normal at time of inspection with no immediate concerns identified.

Responded to AC system blowing warm air following previous frozen evaporator coil issue. Performed diagnostic inspection of indoor air handler and evaporator coil assembly in attic space. Verified outdoor condensing unit operational status and confirmed refrigerant lines no longer frozen with no water present in condensate pan. Assessed system airflow, refrigerant charge levels, and overall HVAC component condition to determine root cause of inadequate cooling performance and provided repair estimate for necessary corrective actions.