Performed routine tune-up on a 4-year-old gas furnace with no reported issues. Inspected the burner assembly, heat exchanger, draft inducer motor and blower, wiring harness connections, gas piping, and PVC exhaust and condensate drain lines, and confirmed the unit was operating properly. Noted dust and debris buildup inside the cabinet and staining on the floor beneath the unit, and recommended monitoring the condensate drain line for leaks.

Inspected the line set and condensate/flex duct wall penetrations and found a split in the flexible duct jacket, deteriorated sealant around the soffit penetration, and damaged, flaking wall material at the exterior opening. Resealed the penetrations, secured the insulated line set bundle with zip ties, and restored the insulation and sealed gaps to prevent moisture and air infiltration and protect system efficiency.

Responded to a no-heat complaint on the upstairs air handler unit blowing lukewarm air. Performed a combustion analysis (10.1% CO2, 92.4% efficiency) and verified gas manifold pressure with a digital manometer (3.37 in. w.c.) at the gas valve, confirming the furnace was firing within manufacturer specifications. Noted dusty, corroded gas piping and furnace interior conditions; system is operating and producing heat.

Inspected the reported non-functioning garbage disposal and evaluated the associated drain system for venting issues. Examination of the under-sink drain assembly, including the tailpiece, P-trap, slip-nut connections, and flexible trap arm to the wall, showed no leaks, corrosion, or visible damage. No bathroom sink components or photographed areas showed evidence of a disposal unit or a vent-related deficiency, so further diagnosis of the disposal and its venting is recommended at the kitchen fixture.

Diagnosed and repaired a continuously running toilet in the front bathroom by servicing the tank's fill and flush components to restore proper water shut-off and flush operation. Also addressed a leaking faucet in the master bath, restoring it to normal, drip-free operation, and verified both fixtures were functioning correctly with no leaks at supply connections.

Performed annual heating system maintenance, including a combustion efficiency analysis using a Testo 310 flue gas analyzer. Initial readings showed O₂ at 11.5% and CO₂ at 5.28%; following adjustments, final readings improved to O₂ at 6.7% with combustion efficiency of 84.5%, confirming safe and efficient burner operation within acceptable parameters.

Installed a complete Napoleon package system serving the second floor, transporting the equipment with a power dolly and additional manpower for safe handling up and down. Mounted a thermostat on the exterior wall within the return air space and verified system operation by measuring supply air temperature at the register with a probe thermometer. Equipment was positioned in the crawl space, with the surrounding area inspected for proper clearance and clean routing of lines.

Performed annual heating preventive maintenance on a furnace that had not been serviced in several years. Recorded combustion and performance data, including 42°F temperature rise, 0.10" WC external static pressure, 48.6Ω hot surface igniter resistance, 2.7 µA flame signal, 8.1% O₂, 7.2% CO₂, 27 ppm CO, and 94.4% combustion efficiency, with gas manifold pressures of 1.81" WC (low fire) and 3.76" WC (high fire). Verified blower motor amperage at 5.62A, and all readings were within acceptable operating ranges.

Performed annual maintenance tune-up on the American Standard gas furnace, including a combustion analysis that measured 11.5% O₂ and 11 ppm CO in the flue gases, confirming clean and efficient combustion within acceptable limits. Verified supply/return air temperatures with a calibrated digital clamp meter and thermocouple, and found the system operating properly with no deficiencies noted.

Performed scheduled club-visit maintenance on the gas furnace, including measurement of supply and return air temperatures with a digital probe thermometer and electrical diagnostics using a true RMS clamp meter to verify component amperage draw. Inspected the air handler cabinet, gas valve, condensate pump, and associated drain piping, finding no visible damage, corrosion, or leaks, and confirmed the system was operating within normal parameters at completion.

Responded to multiple clogged drains and toilet backups on a slab-foundation home with moisture detected along the bedroom/bathroom shared wall. Snaked the affected fixture drains and cleared the blockage, restoring proper flow and eliminating the backups, and inspected the sewer cleanout and drain line using a camera inspection unit to locate the obstruction and confirm line condition. Recommended further moisture mitigation of the damp carpet and wall area, with follow-up evaluation of the slab drain line if dampness persists.

Performed a replacement estimate on a 1987 Weil-McLain boiler with a recurring mercury switch sticking issue, as the homeowner is evaluating whether to keep the unit operating another year. Inspected the open burner compartment, gas controls, wiring, Extrol expansion tank, copper supply/return piping, pressure relief valve, and galvanized flue, and documented typical age-related wear, surface darkening, and dust accumulation with no obvious breakage or leaks. Reviewed repair-versus-replacement options based on the system's age and condition.

Responded to a no-heat call on a 1987 gas-fired boiler with a recurring mercury switch sticking issue and inspected the control compartment, gas control valve, and burner assembly. Found dirty, discolored terminal connections on the gas valve and soot accumulation on the burner tubes, with crumbling refractory material at the appliance base. System was evaluated for continued operation given its age, as the owner is attempting to keep it running another year.

Performed scheduled heating maintenance, including inspection of the integrated furnace control board, low-voltage wiring, and splice connections, and visual inspection of the blower assembly. Noted accumulated dust and debris on the blower wheel blades and dense, tangled wiring with taped wire-nut splices in the control cabinet, which may warrant further evaluation or cleaning to maintain airflow and reliable system operation.

Performed seasonal heating maintenance and measured system differential pressure with a dual port manometer to verify proper airflow and static pressure. Inspected the AprilAire humidifier water panel (evaporator pad) and found heavy mineral buildup and discoloration, indicating it was due for replacement.

Performed a rebuild of the Wilkins 950XL reduced pressure principle backflow preventer assembly, including inspection of the pressure-reducing valve, test cocks, and shutoff valves, and replacement of internal wear components as needed. Restored the assembly to proper operating condition and verified correct differential pressure and check valve function after reassembly.

Responded to a complaint of a high-pitched noise at furnace startup lasting a short duration. Inspected the air handler cabinet and began diagnostics with the draft inducer motor, measuring motor amperage with a true RMS clamp meter (reading 3.92 A) to evaluate motor and bearing condition. Verified cabinet seams and sealant, as well as refrigerant line and pipe penetrations at the cabinet base, to rule out air leakage or vibration as the source of the noise.

Performed a seasonal heating maintenance visit on a Trane gas furnace, replacing the pleated return air filter and labeling it with the service date for future reference. Inspected the furnace cabinet, wiring harness, PVC vent and condensate piping, and adjacent Aprilaire unit, finding no signs of frost, rust, or damage, and left the system operating normally with the service tag attached.

Performed an on-site assessment for a boiler replacement, inspecting the existing gas-fired boiler, draft hood and vent connection, expansion tank, pressure regulator, supply and return piping, and adjacent water heater. Documented significant soot staining, scorching, and discoloration on the boiler's exterior and vent components, along with sediment and water staining on the surrounding floor, indicating combustion and moisture concerns. Photographed all equipment and conditions to support replacement scoping and recommendations.

Performed an on-site evaluation for HVAC system replacement of a closet-installed furnace/air handler with galvanized flue and ductwork, adjacent to a gas-fired water heater. Documented significant staining, mineral deposits, and moisture damage around the PVC condensate drain line and surrounding floor and door trim, indicating prior leakage or a condensate drainage deficiency. Replacement scope should include correcting condensate drainage and verifying flue, ductwork, and gas line connections.