On this page
Questions to practise
Tell me a bit about the systems you have worked on.
She wants to know your experience and what kinds of equipment you know well.
Name the types of systems, like furnaces, boilers, heat pumps or split units. Say if the work was in homes or businesses. Give one short example of a job you did.
A customer says their heating has stopped. What do you do?
She wants to see if you work in a clear order and start with simple checks.
Go step by step. First ask the customer what happened. Then check power, the thermostat and the filter. After that, move to bigger checks. Say why you do each step.
A cooling unit is blowing warm air on a hot day. Tell me each check you make, in order.
She wants exact steps, not general ideas. Order matters to her.
Start simple: thermostat setting, power, filter, outdoor unit running. Then check airflow, coils, fan and refrigerant levels. Use words like first, next, then and finally.
Tell me about a hard fault you found on a job. How did you find it?
A real story shows how you think when the answer is not easy.
Describe the problem, the checks you made, and what you found. Say what you learned. Keep it short and clear. Use the past tense: I checked, I found, I replaced.
How do you explain a problem to a customer?
Customers need to understand the problem. She wants plain words, not technical talk.
Say you use simple words. You can show the broken part. Explain the choices and the cost before you start work. Say you stay calm and answer their questions.
What do you do if a customer is upset about the cost?
She wants to see that you stay calm and do not blame the customer.
Say you listen first. Then explain why the work is needed and give the choices, if there are any. Stay polite. Say you can check with the office if needed.
How do you keep safe before you open a unit?
Safety is very important in this job. She wants real steps.
Name clear steps. Turn off the power, then test that it is off. Wear the right gloves and eye protection. Follow the rules for gas and refrigerant. Say you never skip these steps.
Tell me about a time you saw a safety risk on a job.
She wants to know you notice dangers and act on them.
Give a real example, like a gas smell or damaged wiring. Say what you did to make it safe and who you told. Keep the focus on your actions.
You have five calls today. The second job takes much longer than planned. What do you do?
She wants to see how you plan, communicate and keep the day on track.
Say you call the office and the next customer to tell them. Give a new time. Finish the job safely, without rushing. Then look at the rest of the day and adjust.
What do you enjoy about this work?
She wants to know what motivates you and if you will stay interested.
Be honest and specific. For example, you like solving problems or helping people feel comfortable at home. Give a short example of a job that made you feel proud.
First, I make sure the power is off and safe.

Clara
AI coach

Leo
AI coach
Lines to try
First, I make sure the power is off and safe.
Then I check the thermostat and the filter.
I would explain the problem to the customer in plain words.
Let me show you the part that is broken.
If a job runs late, I call the next customer to tell them.
Before I start, I tell the customer the choices and the cost.
Common questions
What if I do not know a technical word in English?
That is okay. Describe the part or the step in simple words. For example, say “the part that controls the fan.” Clear steps matter more than perfect words. You can also say, “I am not sure of the English word, but I…”
How long should my answers be?
Aim for about 30 to 60 seconds for most answers. Give your steps in order, then one short example. If the manager wants more, she will ask. Short and clear is better than long and unclear.
How can I sound more confident?
Use clear order words like first, next and then. Speak a little slowly. Use real examples from jobs you have done. Practise your answers out loud several times before the interview, so the words feel natural.