1. Inspect Grilles, Registers & Diffusers For Dirt
Grilles, registers, and diffusers are open points in the HVAC system through which air circulates. For this reason, dirt and debris can easily settle on the surface. To ensure efficient, balanced, and uniform air distribution throughout your home, the grilles, registers, and diffusers are all inspected for dirt buildup obstructing proper airflow.
2. Inspect Integrity Of Accessible Ductwork
The overall condition and integrity of accessible ductwork will be examined to identify any leaks, damage, or issues that may impact heating system efficiency.
3. Ductwork Sealed?
Our technicians will verify that the ductwork is properly sealed to prevent air leakage, ensuring that conditioned air reaches its intended destination efficiently.
4. Test Safety Control Operations, Control Sequences & Test Ranges
The safety controls will be tested to confirm they are working properly. This is crucial for preventing hazardous situations as they are in charge of shutting down the system if abnormal conditions are detected. Our technicians then check the sequences of system controls to guarantee they operate in the correct order. Finally, we test the ranges of various controls to make sure they respond appropriately to different conditions.
5. Test Thermostat Operation
A well-functioning thermostat will provide precise temperature control, so the technician will check it to ensure that it is accurately communicating with your heating system.
6. Check & Adjust Thermostat Readings
If the temperature readings on your thermostat are not accurate, we make adjustments to align it with your desired settings.
7. Test & Inspect Drain Pan Safety Switches
The drain pan safety switch helps prevent water damage by detecting the presence of excess condensate water in the drain pan. To protect the overall health and longevity of your HVAC system, it’s necessary to inspect it for any problems that could lead to leaks or water damage.
8. Test & Inspect Unit Safety Switch
The safety switch is designed to interrupt power in emergency situations such as overheating or malfunction. Testing ensures that the safety switch is responsive and functioning as intended.
9. Inspect Cabinet, Cabinet Fasteners & Panels
The condition of the outer housing or cabinet enclosing the heating unit is crucial for protecting its internal components. During the inspection, the technicians will examine fasteners and panels to ensure the cabinet remains tightly sealed, thus preventing heat loss and maintaining the unit’s efficiency.
10. Inspect For Required Clearance Around Cabinet
It’s important that the heating unit has sufficient space around it to prevent overheating and allow for optimal performance.
11. Inspect Electrical Disconnect Box
The electrical disconnect box is a component that allows for the safe disconnection of electrical power to the HVAC system. The technician will make sure that the box is in good condition, free from damage, and that all connections are secure.
12. Check Equipment Grounding
Proper equipment grounding is essential for the safety of both the HVAC system and those interacting with it. Ensuring that the HVAC equipment is effectively grounded minimizes the risk of electrical shock and enhances system efficiency.
13. Measure & Record Line Voltage
Measuring and recording line voltage helps identify any irregularities in the power supply, preventing potential damage to system components.
14. Inspect & Test Contactors & Relays
Contactors and relays are electrical components responsible for controlling the flow of electricity to the unit. We test their functionality to ensure they engage and disengage properly, facilitating the correct operation of the HVAC system.
15. Inspect Electrical Connections & Wire
The technician will examine all electrical connections and wiring throughout the HVAC system to ensure there are no loose or damaged connections that could lead to system malfunctions or even safety hazards.
16. Clean & Tighten Electrical Connections As Needed
Similarly, any dirt or debris around electrical connections is cleaned and loose connections tightened to prevent electrical issues and ensure a secure and reliable connection.
17. Inspect All Stand Alone Capacitors
Stand-alone capacitors are electrical components that store and release energy. Capacitors can degrade over time, and a faulty capacitor can lead to motor failure or inefficient operation. That’s why the technician will confirm the capacitors show no signs of bulging or leaking.
18. Measure & Record AMP Draw To Blower Motor / Nameplate Data (FLA) As Available
The amperage (AMP) draw of the blower motor is measured and compared to the Full Load Amps (FLA) specified on the motor’s plate if available. This is done to ensure the blower motor is drawing the correct amount of current for optimal performance and rule out the presence of motor stress or possibility of system failure.
19. Blower Motor Volts
Besides checking the AMP draw of the blower motor, the technician will also check the voltage supplied to the blower motor to confirm that it matches the specified range required for the efficient and safe performance of the motor.
20. Inspect Fan Belt Tension
This step involves checking the tension of the fan belt that drives the blower motor. Proper tension in the fan belt is crucial for efficient blower motor operation. If the belt is too loose, it may slip, leading to decreased efficiency and airflow. Conversely, if it's too tight, it can strain the motor and other components, causing premature wear.
21. Carbon Monoxide Test
Carbon monoxide (CO) is a highly dangerous colorless and odorless gas produced by incomplete combustion. To safeguard your home and health, a CO test is conducted to ensure the heating system is not producing excessive amounts of this gas.
22. Gas Leak Test
During this step, the technician will conduct a test to detect any potential leaks of natural gas or propane used in the heating system. Because both of these gasses are flammable, they present a serious fire hazard. It is very important to identify any leaks to prevent safety risks or property damage.
23. Static Pressure Test
Static pressure refers to the resistance to airflow in the ductwork and components. In other words, the technician will assess the efficiency of the ductwork and airflow within the HVAC system to help identify any obstructions or issues that might impede the smooth flow of air.
24. Check Drain Lines and Drain Traps
Because drain lines and drain traps play a crucial role in removing the moisture produced during the heating process, thorough inspection of them is necessary to reduce the risk of water damage and mold growth.
25. Replace Standard Air Filter
Air filters trap dust, dirt, and other contaminants to prevent them from entering the system and helping improve indoor air quality. By replacing it with a clean air filter, it will ensure optimal airflow, which in turn allows the system to operate efficiently and save energy.
26. Inspect Air Filter Housing & Air Seal
Finally, we check the condition of the air filter housing and ensure a proper seal to maintain optimal filtration efficiency and prevent air leaks.
Now you know all the major checks that an HVAC technician will carry out during the course of a furnace tune-up. Armed with this knowledge, it’s easy to understand the importance of furnace maintenance and our own limitation in carrying it out. It is a job best left to the professionals.