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Why a Service /Maintenance Agreement?

Will you drive your vehicle 50,000 miles without changing the oil? If “No” then the same logic holds true for your home comfort system. Regular HVAC preventative maintenance from BHMS is the best way to ensure trouble-free operation and peak performance. Our pre-season maintenance is designed to avoid a system failure in severe hot or cold weather when you need it most, and it can also keep your energy bill from getting out of control.


When should I schedule an HVAC system maintenance ?

If the old adage holds true “an ounce of prevention is worth a pound of cure”, then an HVAC preventive maintenance should be performed:

  1. For a system that heats and cools: perform maintenance in the spring and fall.
  2. For cooling system maintenance only: perform maintenance at least once a year, before the cooling season.
  3. For furnace maintenance only: perform maintenance at least once a year, before the heating season.

BHMS Preventive Maintenance Checklist:

BHMS through our BHMS Service Club provide priority service for our customers who have an annual service/maintenance agreement with us. Bi-annual preventative maintenance will ensure that your system runs as efficiently as possible. Outdoor Unit Checklists:

  • Inspect unit for proper refrigerant level and adjust if necessary
  • Clean dirt, leaves and debris from inside cabinet
  • Inspect base pan for restricted drain openings – remove obstructions as necessary
  • Inspect coil and cabinet – clean as needed
  • Inspect fan motor and fan blades for wear and damage – on older models lubricate as needed
  • Inspect control box, associated controls/accessories, wiring and connections. Controls may include contactors, relays, circuit boards, capacitors, sump heat and other accessories. All control box and electrical parts should be checked for wear or damage.
  • Inspect compressor and associated tubing for damage

Indoor Unit Checklist (before operation):

  • Inspect and clean blower assembly (includes blower housing, blower wheel and motor)
  • On older models, lubricate motor and inspect and replace fan belt if needed
  • Check combustion blower housing for lint and debris and clean as necessary
  • Inspect evaporator coil, drain pan and condensate drain lines. Clean as needed
  • Inspect for gas leaks in gas furnaces
  • Inspect burner assembly – clean and adjust as needed
  • Inspect ignition system and safety controls – clean and adjust as needed
  • Inspect heat exchanger or heating elements
  • Inspect flue system – check for proper attachment to the furnace, any dislocated
  • sections, and for signs of corrosion. Replace if necessary.
  • Inspect control box, associated controls, wiring and connections
  • Clean or replace air filter
  • Inspect conditioned airflow system (ductwork) – check for leaks



Indoor Unit Checklist (during operation):

  • Monitor system starting characteristics and capabilities
  • Listen for abnormal noise
  • Search for source of unusual odors
  • Monitor air conditioning and heat pump systems for correct refrigerant charge
  • Measure outdoor dry bulb temperature
  • Measure indoor dry and wet bulb temperature
  • Measure high and low side system pressures
  • Monitor gas furnace for correct line and manifold gas pressure – make adjustments as needed
  • Measure temperature rise and adjust airflow as needed
  • Check vent system for proper operation
  • Monitor system for correct line and load volts/amps
  • Monitor system operation per manufacturer’s specifications
  • Provide system operation report and recommend repairs or replacement as necessary