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annual maintenance, safety inspection

You have scheduled one of our professionally trained service technicians to come out and complete an annual HVAC maintenance on your heating and cooling system. So what happens during HVAC maintenance ?


You will be scheduled for a four hour window of time in which the service technician will arrive. Your service technician will call to let you know when he is on his way. The annual maintenance normally takes around 1.5 -2 hours.

Request service or make an appointment

HVAC Annual Maintenance 

During your annual maintenance, the service technician will be covering:

General System

  • Air filter
  • Thermostat
  • IAQ/UV Lights
  • Safety Switch on Panel
  • Power Disconnect
  • LED Display on Circuit Board
  • Wiring Connections
  • Blower Wheel and Motor Amp
  • Capacitors Rating
  • Motor Bearings
  • Return Air Ductwork
  • Supply Air Ductwork


  • Temperature rise heating
  • Temperature drop cooling

Electric Furnace

  • Check sequencer operation
  • Check each strip heater
  • Limit switch
  • Fan relay or circuit board

Gas Furnace

  • Burners clean
  • Orifice clean
  • Pilot assembly clean
  • Check hot surface ignitor
  • Age of H.S.I.
  • Check limit and safety switches
  • Check gas and valve operation
  • Check gas pressure
  • Check condensate drain and pump
  • Inducer motor amps
  • Check capacitor rating
  • Check intake/exhaust venting
  • Check heat exchanger with camera

Heat Pump or A/C

  • Rinse or vacuum outdoor and indoor coil (when accessible)
  • Check disconnect
  • Check fuses
  • Check refrigerant lines
  • Check caps and valve cores
  • Check refrigerant pressures
  • Check contactor
  • Age of contactor
  • Check condensate drain
  • Check condensate pump
  • Check outdoor fan blade
  • Check outdoor fan motor
  • Motor bearing note
  • Check compressor
  • Attic installation proper emergency drain
  • Check TXV location mounting
  • Check condition of coil fins
  • Condensing unit is level

Ductless Heat Pump (only)

  • Replace batteries in remote
  • Check indoor unit set point temperature
  • Check cooling mode
  • Check heating mode
  • Check fan only
  • Check auto mode
  • Check louver swing

Safety Inspection

Included with your HVAC annual maintenance is a safety inspection. During the safety inspection, the technician will check for any conditions in your system that have the potential to harm or be fatal to you and your household. If there is a crack in the heat exchanger this may cause carbon monoxide emission in your home. For heat exchanger cracks and other possibly harmful or fatal safety hazards found during the safety inspection the technician may have to shut off your system until the issue repaired or replaced.

Local HVAC Maintenance Expert

Do you need to schedule an annual maintenance or have further questions about what happens during HVAC maintenance ? Give us a call today at either 360-524-2880 (Vancouver) or 503-972-2434 (North Portland). Our dispatchers would be happy to schedule an appointment with one of our eight service technicians and/or answer any questions you may have.

It is the industry standard to do an annual maintenance every year and we highly recommend it for a number of reasons. First, it helps prevent breakdowns and costly repairs. Second, it will increase the lifespan of your equipment by making sure it runs efficiently. Lastly, it will keep any warranties you have on the equipment in activation. All manufacturer warranties require annual maintenance of the unit or units in which the warranty covers.

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You have scheduled one of our professionally trained service technicians to come out and complete a HVAC annual maintenance on your heating and cooling system. What should you expect on the day? #HVAC #maintenance @millersheatingair

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