Interview questionsRead at source, 24 September 2026

Maintenance Technician Interview Questions, with a Troubleshooting Test

This page is for the plant manager, maintenance manager or facilities director hiring a maintenance technician, not for candidates. There is usually no single license to check, but specific tasks can need one: refrigerant work needs EPA Section 608 certification, and BLS notes that electrical or plumbing work may need a state or local license. The interview has to find out two things: whether the candidate troubleshoots systematically rather than swapping parts until something works, and whether they lock out equipment every time before they touch it. Ask them to talk you through a real fault. Their method tells you more than their résumé.

What to settle before the interview

Which maintenance job is it? “Maintenance technician” covers two different jobs, and BLS reports them as different occupations. General maintenance and repair workers keep buildings and equipment running across trades: plumbing, electrical, HVAC, doors, drywall. Industrial machinery mechanics and machinery maintenance workers keep production equipment running. The pay is different (see below), the questions are different, and an apartment maintenance tech and a plant PLC tech are rarely interchangeable. Decide which you are hiring and write it into the maintenance technician job description or, for plant work, the industrial maintenance mechanic job description.

Which tasks need a credential?

• Refrigerant. Under 40 CFR 82.161(a)(1), anyone who could reasonably be expected to violate the integrity of the refrigerant circuit while maintaining, servicing, repairing or disposing of appliances containing a class I or class II refrigerant or a non-exempt substitute must pass a certification exam. Type I covers small appliances, Type II medium-, high- and very-high-pressure appliances, Type III low-pressure appliances, and Universal all three. If your tech will work on rooftop units, chillers or walk-in coolers, ask which type they hold.
• Electrical and plumbing. BLS: “For more complex tasks, workers may need to be licensed or certified in a particular specialty, such as electrical or plumbing work. Licensing requirements vary by state and locality.” Check your state and local rules for the work you expect, and decide what goes to a licensed contractor.
• Lockout/tagout. This is your obligation as the employer, not a license the candidate brings. OSHA requires that “authorized employees,” the people who lock out machines to service them, be trained in recognizing hazardous energy sources and in methods of energy isolation and control, and retrained when jobs, equipment or procedures change (29 CFR 1910.147(c)(7)). The interview checks the habit; your training program covers the rule.

Ten maintenance technician interview questions

Ask the same ten of every candidate and score as you go. The first question is a practical walk-through; give it fifteen minutes. If you can, add a short paid working interview on real equipment.

“A conveyor motor trips its overload about twenty minutes into every shift. Talk me through finding out why.”

This is the troubleshooting walk-through, and it matters more than any other question on the page. Play the role of the equipment: when the candidate asks what they would find, tell them. A strong candidate works in order:

• Asks questions first: when did it start, what changed, what the operator has noticed, what the work order history says.
• Locks out before touching anything.
• Checks the mechanical side: a binding bearing, a misaligned or over-tensioned belt, product jamming, a gearbox running hot.
• Checks the electrical side with a meter: running amps against the nameplate, voltage on each leg, a loose connection, the overload setting itself.
• Fixes the cause, not the symptom, then writes it up so the next person knows.

Weak answers jump to a part (“replace the motor”) or to the symptom (“turn the overload up”). Raising the overload setting to stop the trip is the answer that burns out a motor, or worse. Then change one detail (“the amps are fine and the motor is cool”) and see whether the candidate adjusts or repeats themselves. Their reasoning under a changed fact is what you are hiring.

For a facilities role, swap in a building fault: a rooftop unit blowing warm air, or a toilet that runs no matter how many flappers are replaced.

“Before you put your hands inside a machine, what do you do?”

The strong answer is specific and complete: notify the operator, shut down, isolate every energy source (electrical, pneumatic, hydraulic, gravity, stored energy), apply their own lock and tag, and verify zero energy by trying to start it. Listen for “my own lock.” The weak answer is “hit the e-stop” or “it depends how quick the job is.” Quick jobs are when people get hurt.

“Tell me about the worst breakdown you have fixed. How long was the equipment down, and what did you change afterward?”

You want detail: the machine, the failure, the steps, the time, and the change afterward (a PM task, a spare part stocked, a guard added). Candidates who have lived through it remember the details. Vague stories about “fixing a lot of stuff” usually mean they were the helper, not the lead.

“Read this for me.” (Hand over a print.)

Bring an electrical ladder diagram, a hydraulic or pneumatic schematic, or a mechanical drawing from your own equipment. Ask what a component does and where they would start measuring for a given fault. Reading prints is teachable, but you need to know where the candidate is starting from before you set the pay.

“What PLC work have you done? What do you do when you plug in the laptop?”

Only for industrial roles that need it. The strong answer is modest and careful: go online, watch the inputs and outputs, find which condition is not being met, and not change the program without authorization and a backup. Candidates who talk about editing logic on a running line to get it going are a risk, however skilled.

“A PM is due on the press, and the packaging line just went down. Which do you do first, and who do you tell?”

Tests priorities and communication. Most shops want the breakdown first, with the PM rescheduled and the supervisor told, so the PM does not quietly disappear. The weak answer does whichever job they prefer and tells nobody.

“What refrigerant, electrical or other certifications do you hold, and where are the cards?”

Ask for the EPA 608 type and the card, and any state or local license the job needs. Confirm electrical and plumbing licenses with the issuing authority, not from a photo. Certifications that are not required for your tasks are a plus, not a gate.

“Tell me about a repair you got wrong.”

Everyone who has done this work has fixed the wrong thing or had a repair fail. A strong answer owns it, explains what they missed, and says what they check now. “I don't really make mistakes” means they either have not done much or will not tell you when they do.

“It's 2 a.m. Saturday and the line is down. You're on call. What happens next?”

BLS notes that general maintenance workers “may need to be on call outside normal business hours,” and that industrial mechanics “may be on call and work night or weekend shifts. Overtime is common.” Describe your rotation and response time honestly, and ask how they handled on-call before. Strong answers are practical: answer the phone, ask the right questions, arrive, communicate. Hesitation here is better found now than on the first call-out.

“What tools do you use most, and which do you own?”

A multimeter, an amp clamp, alignment tools, a laser thermometer. Listen for how they use them, not just the list. Tell the candidate plainly which tools you provide and which they are expected to bring.

Red flags

• Swapping parts as a troubleshooting method.
• Any shortcut on lockout, or “it depends how long the job takes.”
• Bypassing a safety or raising an overload to keep something running.
• No example of a repair that went wrong.
• Vague about what they actually did versus what the team did.

Not red flags: learning PLCs on the job, experience in only one industry, or a gap spent in a trade or the military. Many strong technicians come from the military, from auto repair or from one of the trades. See electrician interview questions, HVAC interview questions and mechanic interview questions for trade-specific follow-ups.

Questions not to ask

Maintenance interviews can drift into age (“how many years do you have left in you?”), health and injuries, family commitments behind on-call availability, and military discharge details. Ask about the essential functions of the job, including lifting and climbing, and whether the candidate can perform them with or without accommodation; ask about on-call availability directly. See illegal interview questions for the full list.

How to score it

Score each answer from 1 to 4 as it is given. Give the troubleshooting walk-through and the lockout question the most weight; a candidate who scores low on lockout should not go forward whatever their other scores. Have your lead technician sit in and score the technical answers alongside you. The interview scorecard template works for this.

Pay, and what it means for your offer

Within general maintenance, industry matters. BLS reports a median of $61,500 in manufacturing, $51,160 in government (excluding state and local education and hospitals), $50,270 in educational services, $48,360 in real estate and rental and leasing, and $39,590 in accommodation and food services. So if you run apartments or a hotel, the technician across the table may be one application away from a plant job paying more. Your offer has to answer with something real: predictable on-call, overtime, paid training toward a certification, tools, or a path to lead technician or maintenance supervisor.

BLS projects general maintenance employment to grow 4 percent from 2025 to 2035, with about 148,700 openings a year, and the industrial machinery group to grow 14 percent, with about 51,900 openings a year. Experienced technicians are usually employed and can choose.

Hiring on the production floor as well? See manufacturing interview questions.

Frequently asked questions

Sources: BLS Occupational Outlook Handbook, general maintenance and repair workers and industrial machinery mechanics (May 2025 wages); 40 CFR 82.161; 29 CFR 1910.147. Read 24 September 2026.