If you would like to schedule a maintenance appointment for your home's heating and air conditioning system and you want to make sure you get what you are paying for, then below is a detailed explanation of the tasks you should observe the technician performing during their time at your house.
Check the Overall Function of the Heater and Air Conditioner
One of the first things the technician will do is to turn on both your heater and air conditioner by adjusting the thermostat. They will hold a thermometer near a vent and check to make sure the air is as hot or cold as expected. This test is to verify the thermostat is working correctly.
While working with the thermostat, the technician will let you know if its battery needs to be replaced. This simple thing is often overlooked by homeowners and is a leading cause of HVAC systems not functioning correctly that is simple to rectify.
Check the Furnace's Function and Filters
While the furnace is running, the technician will open its blower compartment and check for:
- excessive dust or pet hair buildup
- sounds indicating a future problem
- starting delays
Once they have listened to the system run, they will turn it off and then pull out the furnace's filter and check to make sure it isn't clogged with dust or pet hair. If the blower compartment is dirty, then they will vacuum it out. Finally, the HVAC tech will check each of the electrical wires with a voltage meter to ensure they are all working correctly.
Check the Outdoor Air Conditioner's Compressor Unit
After the furnace has been inspected and has been thoroughly cleaned, then the HVAC technician will go outside and check the air conditioner's compressor unit. During this portion of the appointment you will see them:
- check for blocked vents
- check each wire with a voltage meter
- check to see if there is excess water in the drain pan
- check to see if the drain tubes and drain pan are free of mold or other biological growth
Any leaves or other vegetation stuck in the vent cage will be removed to increase air flow to the compressor unit. If there is any mold or mildew growing in the drain pan or drain tubes, then they will be removed and thoroughly cleaned and disinfected.
Finally, before leaving, the air conditioning replacement technician will speak to you about any problems they have discovered and suggestions for future maintenance or repairs. If repairs or replacement is suggested, then you will also receive a written estimate of the costs.