Expert Care to Keep Your System Running Smoothly
Since 1967, B&W Furnace Service has provided reliable maintenance to Norwalk families. Our tune-ups prevent breakdowns and ensure your heating and cooling systems operate at peak efficiency year-round.
Our Maintenance Process
Comprehensive tune-ups for Norwalk homes
Our comprehensive furnace inspection covers heat exchanger integrity, burner assembly, flame sensor calibration, and safety limit testing to ensure reliable winter operation.
Longevity
Regular maintenance extends the life of your furnace and AC units significantly.
Efficiency
Optimized systems use less energy, keeping your utility bills manageable.
Schedule your seasonal tune-up today.
Maintenance Results
Professional care for your HVAC system
System Wear
Accumulated dust and debris causing strain on internal components.
Optimized System
Cleaned and calibrated for reliable, efficient performance.
Maintenance Checklist
- Heat exchanger and burner inspection
- Refrigerant level and pressure check
- Electrical connection and capacitor test
- Condensate drain and blower cleaning
23-Point Furnace vs 22-Point AC Tune-Up
See exactly what Tommy and our Norwalk technicians inspect during seasonal service. We test every safety switch, measure electrical draw, and leave you with a clear written evaluation.
Winter combustion performance, heat exchanger verification, and CO safety.
1. Heat Exchanger Integrity
P-01Inspect for fractures, corrosion, and dangerous carbon monoxide risks.
2. Burner Assembly & Flame Sensor
P-02Clean and align burners, polish flame sensor rod for clean combustion.
3. Blower Motor & Wheel Cleanliness
P-03Measure amp draw, lubricate bearings, and clear dust buildup.
4. Gas Valve & Manifold Pressure
P-04Verify operating gas pressure to manufacturer specifications.
5. Ignition System & Pilot Operation
P-05Test hot surface igniter electrical resistance and pilot assembly.
6. High-Limit Safety Switches
P-06Test thermal cutoff limits to ensure emergency shutdown triggers work.
7. Draft Inducer Motor Operation
P-07Measure vent motor draw and check flue gas drafting clearance.
8. Thermostat Calibration & Cycle Check
P-08Calibrate heat anticipator and confirm cycle differential timing.
9. Flue Pipe & Chimney Drafting
P-09Ensure exhaust venting is sealed without leaks, backdrafts, or rust.
10. Combustion Air Intake
P-10Check intake louvers and pipes for obstructions or restriction.
11. Condensate Drain & Trap (High-Efficiency)
P-11Flush condensate lines and inspect trap neutralizer where fitted.
12. Electrical Wiring & Terminals
P-12Tighten low and line voltage screw connections and inspect insulation.
13. Air Filter Condition & Sizing
P-13Inspect static drop and replace or evaluate customer-provided media.
14. Temperature Rise Measurement
P-14Calculate return vs supply split across the heat exchanger.
15. Emergency Gas Shutoff Valve
P-15Cycle and confirm manual quarter-turn gas cock operation.
16. Transformer & Relay Voltage
P-16Measure 24V secondary transformer output under heating load.
17. Carbon Monoxide Testing
P-17Ambient testing in supply airstream and living space perimeter.
18. Blower Door Safety Interlock
P-18Confirm power cuts off when furnace access panel is removed.
19. Ductwork Plenum Visual Check
P-19Scan supply plenum connections for major air leakage points.
20. Gas Leak Sniffer Scan
P-20Electronic combustible gas sniffer check at all supply joints.
21. Circuit Board Diagnostic History
P-21Read and clear stored fault flash codes from furnace control board.
22. Vibration & Acoustic Dampening
P-22Inspect mounting pads and blower isolation grommets for quiet run.
23. Full System Operational Run
P-23Complete 15-minute steady-state burn observation and technician report.
September through November (Pre-Heating Season)
Summer heat tolerance, coil heat dissipation, and refrigerant calibration.
1. Refrigerant Charge & Subcooling/Superheat
AC-01Measure suction/liquid pressures against factory charging charts.
2. Condenser Coil Cleaning & Debris Removal
AC-02Wash aluminum fins and clear debris impeding outdoor heat rejection.
3. Evaporator Coil Inspection
AC-03Inspect indoor coil face for restriction, microbial growth, or icing.
4. Compressor Amperage & Startup Run
AC-04Measure running load amps (RLA) and evaluate start gear function.
5. Dual Run Capacitor Testing
AC-05Test microfarad (MFD) capacitance for compressor and outdoor fan.
6. Contactor Points & Electrical Arc Check
AC-06Inspect electrical relay contacts for pitting, burning, or chattering.
7. Condensate Drain Line & Float Switch
AC-07Flush primary drain line and verify emergency overflow shutoff switch.
8. Outdoor Fan Motor & Blade Balance
AC-08Check fan bearing wear, blade balance, and motor amp draw.
9. Thermostat Function & Cooling Cycle
AC-09Test cooling call response, stage sequencing, and setpoint accuracy.
10. Temperature Split Across Coil
AC-10Measure supply and return air Delta-T (target 16°F–21°F range).
11. Electrical Disconnect Box & Fuses
AC-11Inspect outdoor pull-out head, terminals, and cartridge fuse seating.
12. Refrigerant Line Insulation
AC-12Inspect suction line armor flex foam to prevent energy loss and sweating.
13. Indoor Air Filter Inspection
AC-13Examine return air filter for restricted airflow and static pressure.
14. Indoor Blower Wheel & Airflow
AC-14Check air handler or furnace blower CFM delivery for cooling mode.
15. Expansion Valve (TXV) Operation
AC-15Verify metering device responds smoothly to suction temperature.
16. High & Low Pressure Safety Controls
AC-16Confirm pressure switches protect compressor from loss of charge.
17. Condenser Pad Stability & Level
AC-17Check ground settlement and vibration isolation underneath unit.
18. Wiring & Lug Tightness
AC-18Torque outdoor high-voltage connections to avoid thermal hotspots.
19. Schrader Valve & Seal Cap Check
AC-19Confirm service ports are tight with rubber gaskets to prevent slow leaks.
20. Duct Static Pressure Drop
AC-20Measure system external static pressure to prevent coil freeze-ups.
21. Crankcase Heater Verification
AC-21Confirm belly band heater operation where equipped for winter protection.
22. Complete Cooling Cycle Validation
AC-22Full run test under Southern California heat load with summary log.
March through May (Pre-Cooling Season)
Family-Owned Honest Evaluations Since 1967
No artificial upsells. We explain every reading in plain terms and provide free estimates on new installations in Norwalk and nearby communities.