How to do it
Use dictation, not voice mode
These are two different features and people pick the wrong one. Voice is a live back-and-forth conversation, which you do not want in a mechanical room. Dictation converts your speech into prompt text before it sends, so you can read it and fix it first. Tap the microphone icon in the text box and talk.
Talk the way you would tell your service manager
Dictation is built to handle pauses, restarts and normal conversational phrasing, so you do not have to speak like a robot. Say what you found, what you did, what parts went in, what you could not finish, and what the customer needs to know. Ninety seconds of talking beats four minutes of thumb typing in a truck.
Write one prompt and reuse it forever
Precise instructions that spell out the format beat a vague request every time. Write one prompt that says exactly what sections you want: work performed, parts used, findings, recommended follow-up, and what the customer was told. Save it in your phone's text replacement or a notes app and paste it above the dictated text each time.
Give it two real examples
Including a handful of example inputs and outputs steers the model toward the task better than description alone. Paste two of your best-written past job notes into the prompt as examples of the output you want. Nothing else you do here helps as much, and it takes ten minutes once.
Tell it what to do when something is missing
Add a line: if a required detail was not mentioned, write 'not recorded' rather than guessing. Without that instruction you get a note that reads smoothly and quietly invents a model number. This is the difference between a tool you can trust and one that creates warranty problems.
Read it before it goes in the customer file
Voice transcripts are not verbatim records and may not exactly match what was said. Model numbers, serial numbers, refrigerant charge, torque values and pressure readings all need eyeballing. Ten seconds of reading catches the one number that would have cost you a callback.
Where this goes wrong
The parts most guides skip, and the ones that actually cost you money:
- Noise, distance and crosstalk are what actually break it. Accuracy moves with background noise, overlapping speakers, how far the mic is from your mouth, and language. A blower running three feet away will wreck a transcript. Step outside or into the truck, hold the phone close, and speak once rather than over a coworker.
- Audio sticks around as long as the chat does. Audio and video clips from voice chats are retained for as long as the chat is part of your chat history. If a tech dictates something that includes a customer's alarm code or gate code, that audio is sitting in an account somebody else may have access to. Set a rule about what does not get spoken into the app.
- There is no published accuracy number, so do not promise one. OpenAI does not publish an accuracy percentage for ChatGPT transcription. Any figure you see quoted is somebody's estimate. Build your process around reviewing the output rather than trusting a number nobody stands behind.
- This does not replace your field service software. The note still has to land in the job record in Housecall Pro, ServiceTitan, Jobber or whatever you run. ChatGPT produces the text. Somebody pastes it. If your techs will not paste, this whole workflow dies in week two and you have not fixed anything.
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Common questions
Will this work with a heavy accent or trade jargon?
Usually, but it degrades. Accuracy varies with accent, terminology and audio quality, and specialized vocabulary is exactly where transcription tends to slip. Model numbers and brand names are the common failures. Spell those out letter by letter when you dictate them.
Can a tech do this without a paid account?
Dictation is available in the ChatGPT app on a free account, subject to usage limits. Voice conversations run on a separate plan-dependent allowance measured in rolling five-hour windows. For dictating job notes a few times a day, free is generally enough.
Is this better than just typing the note?
For anything longer than two sentences, yes, mostly because it gets written at all. The real problem with job notes is not formatting, it is that a tired tech at 5:40pm writes 'fixed unit' and drives home. Talking for 90 seconds is a low enough bar that it actually happens.
Should the summarized note or the raw dictation go in the file?
Keep both if your software allows it. The cleaned-up summary is what the office and the customer read. The raw dictation is your record of what the tech actually said, which matters the day a job gets disputed.
Sources
- ChatGPT Voice — ChatGPT Learn (OpenAI)Voice is a live conversation with turn-taking; voice dictation converts speech into prompt text before sending; voice conversations use a separate plan-dependent allowance measured in rolling five-hour windows.
- Using voice — OpenAI AcademyTap the microphone icon in the text box to dictate; ChatGPT is designed to handle pauses, restarts and conversational phrasing; audio and video clips from voice chats are retained as long as the chat is part of your chat history.
- Prompt engineering guide — OpenAIModels benefit from precise instructions that provide the logic and data required, and few-shot examples steer a model toward a new task.
- Can ChatGPT Transcribe Audio? Capabilities and Professional Limitations — SonixOpenAI publishes no accuracy percentage for ChatGPT transcription, and accuracy moves with background noise, overlapping speakers, microphone distance, accent and terminology.
Related guides
- How to use ChatGPT for quotes and estimates
- How to use Claude for quotes and estimates
- How to use Gemini for weekly reports
- How to use ChatGPT for scheduling and dispatch
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