HVAC/R Technician Screening Interview Template

What kind of HVAC/R work do you do, and what equipment have you worked on: residential split systems and furnaces, commercial rooftop units and package units, chillers, or commercial refrigeration and walk-ins? Is your background more install, more service and repair, or both, and roughly how many calls or jobs do you run in a day?

What this assesses: Establishes skill level and matches the tech to the right work, since a residential change-out installer and a commercial refrigeration service tech are not interchangeable, and a service role needs someone who can run calls solo. Strong answers name the equipment classes they have real hands-on hours on, are clear about the install-versus-service split, and give a realistic daily call or job count; be cautious with a candidate who says they can work on anything, cannot name the equipment types, or has only carried tools and pulled linesets on installs when the role needs independent diagnosis and repair.

What is your EPA Section 608 certification level (Type I, Type II, Type III, or Universal), and is it current? Do you hold any other credentials such as NATE certification, a state or local HVAC or contractor license, an EPA 609 for MVAC, or an OSHA card? Which of these are active right now?

What this assesses: Confirms the credentials that gate what a tech can legally do, since handling refrigerant without the right 608 type is illegal and many jurisdictions require a state or local license to pull permits or work unsupervised. Strong answers name their exact 608 type (Universal covers all system sizes), know whether any state license or NATE cert is current, and understand what each one lets them do; be cautious with a candidate who cannot name their 608 level, assumes 'certified' is enough, claims a license they cannot document, or does not realize an expired card stops them from buying or recovering refrigerant.

Walk me through how you diagnose a no-cooling call. A customer says the system runs but the house is not getting cold. What do you check, in what order, and how do you confirm the actual fault before you replace anything?

What this assesses: This is the question that separates a real technician from a parts-changer, the single biggest difference in a tech's value. Strong answers describe a logical process: verifying the complaint, checking airflow and the filter, taking superheat and subcooling readings, checking the electrical and the capacitor, and confirming the fault before condemning a compressor or coil. Be cautious with answers that jump straight to 'it needs a compressor' or 'recharge it,' cannot explain what superheat or subcooling tells them, or only know how to swap boards and parts, which means slow calls and comebacks.

Tell me about your experience with refrigerant. How do you recover, evacuate, and charge a system correctly, how do you weigh in a charge or use superheat and subcooling to verify it, and how do you find and fix a leak instead of just topping it off?

What this assesses: Tests the refrigerant-handling competence that protects both the equipment and the contractor's EPA compliance, and separates techs who fix systems from ones who create repeat calls. Strong answers describe recovering into a recovery machine rather than venting, pulling a proper vacuum with a micron gauge, weighing in or verifying the charge by superheat and subcooling, and locating and repairing leaks; be cautious with a candidate who talks about 'just adding a couple pounds,' has never used a micron gauge, vents refrigerant, or treats a low charge as a top-off instead of a leak to find, which is both illegal and a callback waiting to happen.

HVAC work is high-voltage and rooftop work. Walk me through how you work safely around live electrical, capacitors, gas and combustion on the heating side, and up on a roof or a ladder. Have you done your own electrical troubleshooting with a meter?

What this assesses: Surfaces the safety judgment and electrical competence the job lives on, since most service diagnosis is electrical and the fastest way to hurt someone or start a callback is sloppy work around 240V, capacitors, or gas. Strong answers describe locking out power, discharging capacitors, testing before touching, safe ladder and rooftop practice, and real comfort using a multimeter to trace a control circuit; be cautious with a candidate who is casual about live electrical, has never discharged a capacitor, cannot describe metering out a circuit, or gets vague on gas and combustion safety on furnaces.

Tell me about a repair that came back, a system you misdiagnosed, or a customer who was unhappy with a job. What happened, what was the root cause, and what did you change afterward?

What this assesses: Reveals quality, honesty, and accountability, which separate a tech who fixes it right the first time from one who generates comebacks and warranty losses. Strong answers own a specific callback, explain the actual root cause, and describe what they changed in their process; be cautious with a candidate who claims they have never had a comeback or blames the part, the customer, or the last tech, both signs of thin experience or poor accountability.

Do you own your own hand tools and gauges, and do you have a valid driver's license and a clean enough record to drive a company truck? Are you comfortable being the face of the company in a customer's home, and can you explain a repair and a price to a homeowner?

What this assesses: Assesses field readiness and the customer-facing side that decides whether a service tech can run calls unsupervised. Strong answers confirm they own the hand tools and gauge set their level requires, hold a valid license with a record that will pass the fleet insurer, and can explain a diagnosis and estimate to a customer plainly; be cautious with a candidate who expects the shop to supply hand tools, has a driving record that will not clear a company truck, or cannot describe talking a customer through a repair, since service techs sell and communicate as much as they wrench.

HVAC is seasonal and demand-driven. Peak cooling season means long days, and service roles often carry on-call, nights, weekends, and rooftop work in the heat. What is your availability, are you willing to take on-call rotations and overtime in season, what are your pay expectations, and how soon could you start?

What this assesses: Captures the logistics that most often break field placements late, since the summer and winter peaks are exactly when a contractor needs coverage and when a tech's willingness to take on-call and overtime actually matters. Strong answers give clear availability, say whether they will take on-call, weekend, and peak-season overtime, give a realistic pay range for their level, and a concrete start date; be cautious with a candidate who wants straight weekday days only, will not do on-call or rooftop work in the heat, or expects top journeyman pay without the credentials or diagnostic ability to back it, which stalls a placement after you have already qualified the skills.