Free HVAC Interview Scorecard
Print one per candidate. Questions are grouped by area, each with a 1 to 5 rating and room for notes, so two interviewers rating two candidates produce something you can actually compare. The answer key for every question is on the interview questions page.
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HVAC technician interview scorecard
Reviewed September 8, 2026 · tradegrader.ai
Diagnostic thinking
Walk me through a call where the obvious answer turned out to be wrong.
Best for: All roles
You gauge up and suction pressure is low with high superheat. What do you check next?
Best for: Service, maintenance, commercial
How do you decide whether a compressor has actually failed?
Best for: Service, commercial
A customer says their system was fixed last week by someone else and it's doing the same thing. How do you handle that call?
Best for: Service, maintenance
Tell me about a call you couldn't solve.
Best for: All roles
Electrical, controls and airflow
Walk me through how you'd isolate a no-cool call where the outdoor unit isn't running.
Best for: Service, commercial
How comfortable are you reading a wiring diagram on equipment you've never seen?
Best for: All roles
When do you check static pressure?
Best for: Service, install, maintenance
Safety and code
Tell me about a time you had to stop work for a safety reason.
Best for: All roles
What's your process before you work on anything energized?
Best for: All roles
What do you do if you find a gas leak or a cracked heat exchanger and the customer doesn't want to deal with it?
Best for: Service, maintenance
Customer-facing judgment
How do you explain a repair-versus-replace decision to a customer?
Best for: Service, maintenance
A customer is upset before you've said a word. What do you do?
Best for: All customer-facing roles
Their last shop
What would have kept you?
Best for: All roles
Describe how your last shop dispatched you.
Best for: Service, maintenance, commercial
What's the ratio of your work that was maintenance versus service versus install?
Best for: All roles