Installed a new Lennox gas furnace in the utility closet, connecting the supply and return ductwork and plenum transitions. Routed and secured PVC intake and exhaust venting and connected the gas supply with a shutoff valve. Completed the electrical connections, mounted the required warning and specification labels, and left the installation instructions with the equipment.

Performed the annual fall tune-up on the gas-fired boiler, inspecting the burner assembly, flue and draft hood venting, circulator pump, expansion tank, pressure gauge, and associated piping and valves. The system was found to be operating normally with no leaks, corrosion, or deficiencies noted, and the customer was enrolled in the maintenance club program.

Responded to a no-heat call on two approximately 30-year-old gas furnaces in the basement serving the residence, and performed a diagnostic evaluation of both units, including inspection of the burner assembly, blower/inducer components, and control wiring. Both units were found to be non-operational and at the end of their service life, so a recommendation for replacement was documented and the account was forwarded to sales for a quote on new high-efficiency equipment.

Completed the finish phase of the furnace and zoned ductwork installation following drywall completion. Removed the manual dampers from the existing supply trunks, ran a dedicated 35-ft basement supply trunk off the furnace with the required fittings, and routed the return through the staircase framing. Installed and sealed Honeywell zone damper actuators with foil-taped seams, with the system left clean and intact.

Responded to a callback following a recent tune-up for a reported continuous heat call in the basement zone. Inspected the Honeywell HZ322 zone control panel, associated low-voltage thermostat wiring, and zone damper connections at the furnace plenum to diagnose the stuck heat demand, and restored proper zone control operation.

Responded to a no-heat call on an American Standard commercial rooftop unit and diagnosed a failed control circuit board as the cause. Replaced the defective board with a new one, restoring normal heating operation.

Responded to a callback for water leaking beneath the furnace and found the condensate drain hose disconnected from the condensate trap inside the furnace cabinet. Reconnected the hose to the trap, secured it with spring clamps, and tested the system to confirm proper condensate drainage with no further leaks.

Responded to a customer complaint of uneven heating and cooling in the main residence and inspected the zoned ductwork, including the plenum, round trunk takeoffs, mastic-sealed ceiling penetrations, and damper actuator wiring. Observed the damper actuator and low-voltage control wiring to be secured and intact, with no visible air leakage, damage, or anomalies at the duct connections or conditioned space.

Performed a scheduled maintenance tune-up on a Goodman gas furnace, inspecting the cabinet, venting, condensate line, burner assembly, and air filter housing. Verified proper system operation and airflow, and the unit was left in good working condition with no issues identified.

Responded to a no-heat callback following a recent blower replacement and found the Lennox SureLight ignition control board in a soft lockout (HE 270) after exceeding the maximum number of ignition retries, with no flame current sensed. Inspected the control board and wiring harness, which showed no visible burn marks, corrosion, or damage, and verified the system for proper flame sensing and ignition operation.

Performed annual maintenance on a Guardian gas furnace under the maintenance agreement, including cleaning and a complete operational inspection. The unit was found to be in good working condition, with no deficiencies identified and no repairs required.

Removed two defective ceiling light fixtures (one flickering, one inoperative) from the basement joists and installed replacement porcelain-style lampholders, securing each to the framing and terminating the supply conductors at the fixture base. Verified proper operation of the new fixtures with lamps installed, restoring full basement lighting.

Performed scheduled preventive maintenance tune-ups on two furnaces and two air conditioning systems under the maintenance agreement, including inspection of the air handler, condensate drain, and refrigerant line insulation. Verified system pressures with digital manifold gauges, confirmed the Aprilaire humidifier, filter cabinet, and ductwork connections were clean and free of rust or visible damage, and found all four units operating within normal parameters.

Investigated loss of power to the exterior post light by evaluating the upstream GFCI receptacles, which exhibited inconsistent voltage readings after the customer's previous replacement attempt, and by assessing the underground wiring feeding the pole as a possible fault point. Reviewed the newly installed photocell as part of the circuit diagnostics. The lantern-style post light was observed illuminated and operating at the conclusion of the visit.

Performed annual maintenance on the Carrier gas furnace, including cleaning and a full operational inspection, with all components found in good working condition and no repairs required. Replaced the 16x25x4 filter, and the system was left operating properly and prepared for the heating season.

Performed annual fall tune-up and plan renewal on a Goodman gas furnace, inspecting the burner assembly, combustion chamber, venting, and 20x25x4 filter. Noted heavy corrosion and rust staining on the combustion chamber walls and burner area, which should be monitored or evaluated further for heat exchanger integrity.

Performed a prepaid tune-up on the Bryant upright gas furnace and inspected the burner/blower compartment, wiring, and motor assembly. Carbon monoxide testing at the furnace recorded sustained levels of 125–177 ppm, indicating unsafe operation. Documented the readings with photos and referred the unit to sales for furnace replacement.

Responded to a call for whistling in the ductwork, a recurring complaint, and inspected the gas furnace, air handler, plenum, and supply/return duct connections for airflow restrictions. Visual inspection showed the furnace, flex duct transitions, and condensate drain lines in place, with dust on the plenum but no frost, ice, or rust on the air handler. System was left in operation and the customer was advised to monitor for noise recurrence.

Performed annual fall furnace tune-up under prepaid maintenance plan; inspected and tested system operation, which was found to be normal. Inspected the Aprilaire whole-home humidifier and noted a stained evaporator water panel along with corrosion and mineral buildup at the copper supply line fitting, recommending panel replacement and fitting service.

Installed a new furnace with a "C" width supply plenum, reusing the existing return drop and 1" filter cabinet. Replaced approximately 30 ft of 3" cellular core PVC piping, and supplied the unit from a 15-amp breaker in the existing Cutler Hammer panel. System was connected, verified for proper operation, and left clean and functional.