HVAC Preventative Maintenance

Safety is our number one priority in meeting your HVAC needs. You wouldn’t drive your car 100,000 miles without changing the oil. The same logic holds true for your home comfort system. Regular HVAC preventative maintenance is the best way to ensure trouble-free operation and peak performance. Pre-season maintenance is also important. It can help 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. The old adage is true: an ounce of prevention is worth a pound of cure.

We provide the following services, recommended annually, for residential preventative maintenance (tune up):


  • 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.
  • Measure high and low side system pressures.
  • Monitor system for correct line and load volts/amps.
  • 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.
  • Inspect & replace any missing or broken suction line insulation.
  • Recommend repairs or replacement as necessary.


  • Inspect blower assembly (includes blower housing, blower wheel and motor).
  • On older models, lubricate motor and inspect fan belt if applicable.
  • 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 filters (disposable filters at additional cost).
  • Inspect conditioned airflow system (ductwork) - check for leaks.
  • Monitor system starting characteristics and capabilities.
  • Listen for abnormal noise.
  • Measure indoor dry and wet bulb temperature (cooling season).
  • 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.
  • Recommend repairs or replacement as necessary.

Next Steps...

CONTACT US to schedule an appointment or for any questions you may have! Whether you're "in the market" right now, or researching your options, we enjoy hearing from our customers and value your feedback. We look forward to receiving your questions, comments and suggestions!

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Dayton Heating & Air Conditioning, Heating & Air Conditioning, Urbandale, IA