Your Furnace Maintenance Questions Answered – Part 2
For our previous blog post in this series: click here.
Question 2: What Does An HVAC Technician Do During A Furnace Tune-Up?
While performing a furnace tune-up, an HVAC technician will take many steps to help improve your unit’s efficiency and performance. Every HVAC company has their own routines but the basic steps most techs take are:
- Look through duct system for air leakages and blockages
- Check heat exchanger for damage related to carbon monoxide leaks
- Clean blower wheel and compartment to remove containments and check performance (tightening and replacing belts)
- Test the blower door’s seal
- Check air intake grilles for blockages
- Do a blower motor amp-draw test for performance issues
- Test burner ignition and flame sensor
- Lube bearings and moving parts of the motor to reduce friction
- Test electrical connections throughout the HVAC unit
- Inspect wiring for fraying and damage
- Test calibration of thermostat – find accurate temperature readings
- Check flue to make sure there are no blockages or damage hindering ventilation
- Test safety controls including high limit switch to prevent overheating and lower fire risk
- Check furnace startup cycle, inspecting for proper performance
- Inspect furnace filter, replacing if needed
For gas and oil furnaces, some extra steps may need to be taken:
- Thermocouple is checked for damage and replaced if needed – to eliminate explosion risk
- Check system combustion to make sure gases meet the system specs
- Examine ignition system functionality
- Examine and clean burner, test flame and adjust
- Check fuel lines for damage, repair as needed
- Inspect manifold gas pressure to ensure the furnace’s burners are getting the right amount of fuel.
Ready to schedule your annual preventative furnace maintenance tune-up? It’s never too late! Contact A-Abel to have an expert HVAC technician out to your home, today!