Performed diagnostic evaluation of an approximately 30-year-old gas-fired tank water heater for warranty assessment, with the main water supply found shut off. Inspection identified backflow from the water heater into the well system as the cause of pressure loss at the well tank, and the unit's age and condition were documented for coverage review.

Completed a first-visit planned maintenance on a 1-year-old furnace, performing a full heating system diagnostic that covered safety inspection and electrical, motor, ignition, and gas system evaluations. Measured voltage, motor amp draws, flame sensor signal, igniter resistance, gas pressure, and temperature rise, with all readings within acceptable operating ranges and the system found operating properly. Noted heavy rust, corrosion, and debris buildup on the adjacent boiler piping and valve assembly, which may warrant further evaluation.

Replaced the internal hose of the Honeywell whole-house bypass humidifier mounted on the supply plenum. Verified the unit, humidistat control, and associated water supply connections were intact, with no visible damage, leaks, or corrosion on the surrounding ductwork.

Installed a new Lennox EL297UH070XV36BK gas furnace in the utility closet, connecting it to the existing supply plenum and ductwork. Completed PVC intake and exhaust venting with rubber couplings, routed the condensate drain piping, and connected the gas supply with a flexible gas line.

Installed a new Goodman 3.5-ton ML13KC1 condensing unit with a matching CK40HT evaporator coil on the existing furnace, connecting refrigerant lines and condensate drain. Evacuated the system with a vacuum pump, charged with R-410A by weight using a digital refrigerant scale, and verified proper system operation.

Performed planned maintenance on the furnace as part of the USA Diamond service plan, including inspection of the system and replacement of the 210 filter. Serviced the #35 humidifier, verifying the water treatment cartridge and supply line connections, and confirmed the copper line, grounding clamp, and surrounding ductwork showed no signs of leaks, corrosion, or damage.

Performed scheduled annual maintenance on a approximately 10-year-old gas furnace, including inspection of the cabinet, venting and PVC condensate drain piping, and supply ductwork connections. Verified secure fasteners and sealed connections, confirmed proper condensate drainage routing, and found no abnormal conditions or operational concerns. System left in normal working order.

Performed planned heating system maintenance including a full diagnostic inspection of the furnace, recording voltage, amp draw, capacitor values, and manifold gas pressure, and cleaning components as needed. Verified ignition, gas, and safety systems operate within specification, replaced air filters, serviced the humidifier, and flushed the water heaters to remove sediment, completing final system checkout with all readings acceptable.

Removed the toilet and cut out the failed 3" copper drain line from the cast iron hub to the vent stack, then replaced it with new PVC drain piping and fittings. Relocated the tub drain connection in PVC and joined the new PVC to the existing cast iron and remaining copper using mechanical transition couplings with band clamps. Reset the toilet and pressure-tested the system to confirm leak-free operation.

Performed a planned maintenance visit on three geothermal heat pump systems, including a full system performance check and replacement of the in-line filters on all units. Replaced two sight glasses and completed a flush of the geothermal loop on all three systems to restore proper flow and heat transfer. Systems were left operating normally following service.

Performed a planned heating system maintenance with a full diagnostic evaluation covering general, safety, electrical, motor, ignition, and gas system checkpoints. Replaced the air filter and cleaned the blower wheel, then verified capacitor and amp draw readings, ignition resistance, flame sensor condition, manifold pressure, and temperature differential. All checked components operated within normal parameters, and the system was left in proper working order.

Completed full HVAC system replacement, installing a Lennox EL297UH090XV48C 90,000 BTU high-efficiency gas furnace with CK40CT-48C-71 evaporator coil, ML17KC2-036-230 3-ton condenser, and new 3/8" x 3/4" refrigerant lineset. Added an AA600M humidifier, AA1620 air cleaner, and S200 smart thermostat, then connected and routed PVC venting and condensate drain to the floor drain. Charged the R410A system by weight using a digital refrigerant scale and verified system operation.

Replaced two 50-gallon gas-fired power-vent water heaters and the recirculating pump. Installed the new A. O. Smith units side by side with a copper crossover connection, new flexible gas connectors, and PVC power-vent piping routed to the exterior. Reconnected the recirculation and domestic water lines, then verified proper operation with no leaks.

Responded to a loss of water pressure following the previous day's tanked water heater service. Inspected the water supply piping, isolation valves, and bypass assembly on the whole-house water treatment system (twin-tank softener/filter with digital control head and brine tank), and confirmed proper valve positions and flow through the copper supply lines. Restored full water pressure and verified normal operation at the fixtures.

Completed a full HVAC system replacement, installing a Lennox EL297UH090XV48C 90,000 BTU high-efficiency gas furnace with a CK40CT-49C cased evaporator coil and a Lennox ML17KC2-048 4-ton, 230V air conditioning condenser on a level pad with a new electrical disconnect and flexible conduit. The installation included a bump box, galvanized supply plenum and duct transitions, PVC combustion/condensate piping with a condensate pump, insulated refrigerant lines, and an S200 filter cabinet with an Aprilaire 1620 media air cleaner. The system was set up and verified for proper operation.

Performed planned maintenance on a single furnace, completing a full heating system diagnostic that covered safety inspection, electrical and motor evaluation, ignition system testing, and gas system verification. Recorded line and control voltage, capacitor and amp draw readings, ignitor resistance, flame sensor signal, and gas pressure measurements, and completed final check-out to confirm proper operation.

Inspected the downstairs hydronic zone valve and actuator; the 24 VAC actuator wiring and terminal connections were intact, and the copper piping and press-fit fittings showed no leaks, corrosion, or visible defects. Checked the adjacent press-fit copper connections and piping runs with a handheld diagnostic device to verify system condition and isolate the cause of the reported valve issue.

Performed a planned furnace maintenance, completing a full heating system diagnostic that covered general evaluation, safety inspection, electrical and motor testing, ignition and gas system checks, and final check-out, with voltage, amp draw, resistance, and pressure readings recorded and within normal range. Replaced the humidifier pad, and noted rust on the heat exchanger for monitoring.

Performed Platinum-level planned maintenance on one gas-fired furnace system, including inspection of the burner and vent housing, gas supply line, ball valve, and associated wiring. Observed soot-like staining on the black iron gas piping and discoloration at the copper tube fitting, and confirmed the gas line connections and shutoff valve were sealed with thread sealant. System was left in proper operating condition, with the soot buildup and fitting discoloration noted for monitoring on future visits.

Performed planned heating maintenance on the gas furnace, including inspection and cleaning of the hot surface igniter and ignition components, and replaced the 14x20x1 air filter. Inspected the condensate drain assembly and PVC piping, noting green residue and mineral buildup at the drain connections, and recommended monitoring for leaks. Observed corrosion on the black iron gas piping and dust accumulation on the cabinet, and advised further evaluation of the piping.