Find the line that settles it · Home service trades 1

Send it the text and nothing else

From memory

Fundamentals 10

That is this lesson. Below is a text of the kind that lands at 6:50 on the first cold morning of the season, before the office opens. The customer, the firm and the equipment maker are invented. You are going to send the tool the text and nothing else: no job history, no model number, no warranty paper. First, a guess.

Guess first

You are about to send the tool a customer's text with no job file attached. Will it ask what furnace she has, or who made it, before it answers?

Yes, it will ask firstNo, it will answer anywayNo idea

And how sure are you?

Fairly sureGuessing

Nobody else sees this and nothing here is marked. Being wrong here is worth more than being right.

Paste this in, and nothing else

Reply to this customer text as the owner of the HVAC company that installed her furnace. Under 80 words, plain language, friendly.

The text. Read it once first.

Hi, it's Lena. The furnace you guys put in a couple of years ago started making a grinding noise last night and this morning there is no heat at all. House is at 58. Is this covered? Can somebody come today?

I sent the text and nothing else. No model number, no install date, no warranty paper
I noticed whether it asked a question before answering, or answered straight away

Whether the customer with the grinding furnace is covered is not in your head, it is on a warranty certificate and on your own labor warranty, and the tool has never seen either. Fifteen minutes on the check that replaces knowing.

Lesson 01 · Where the number lives

By the end you can

Name the one document that settles a warranty sentence, and find the line on it
Reply to a customer's is this covered text without saying yes or no
Run the Spec Check on a number or a promise you cannot vouch for from your desk

What you need

Any of the four, free tier. Nothing to upload. The job snapshot you need is on this page, and it is invented.

Home service trades · AI for your trade

Read the reply the way Lena would

Paste its reply here, then tick what is true of it

Check your own work0/4

It said covered, likely covered, should be covered, or under warranty, about a furnace it has never seen
It promised someone today, or a time window, with no look at the dispatch board
It never asked what furnace she has, when it went in, or who made it
Nothing in it points to a document. It reads as though the answer lives inside the tool

If it asked what furnace she has first, that is the right move and rarer than you would think, and you still have to open the paper, because the tool cannot. If it answered anyway, it wrote about a warranty it has never read, in the same voice it would use if it had. Neither reply is the answer. The answer is on two pieces of paper the tool does not have: the manufacturer's certificate and your own labor warranty.

You own what you send. In 2024 a Canadian tribunal held an airline to what its own website chatbot had told a customer about a fare. The airline argued the chatbot was a separate legal entity responsible for its own actions. The tribunal called that a remarkable submission and said it "makes no difference whether the information comes from a static page or a chatbot" (Moffatt v. Air Canada, 2024 BCCRT 149, paragraph 27). A text from your number that says this is covered is your text. Lena will not check it against a certificate she has never seen, and she should not have to. That is your job.

Open the snapshot and find the line

Now the paper. Below is Lena's job as the shop holds it, cut down to what matters, and every line of it is invented: Manufacturer M does not exist and neither does the TRN-F80. Everything a real job record carries that a customer would recognize as theirs has been left off, which is lesson 2's subject.

RS-01. Residential, HVAC. Gas furnace replacement. Snapshot dated 09-2026. Equipment: Manufacturer M gas furnace, model TRN-F80. Installed by this firm 03-2024. Manufacturer warranty: parts, 10 years, registered online 04-2024. Labor not covered by Manufacturer M. Firm labor warranty: 1 year from install. Expired 03-2025. Permit: final inspection passed 04-2024. Agreement: none. Price book: D-100, diagnostic visit, 150. Open items: none.

This is the Spec Check. It is what the One-Thing Check becomes when the number or the promise is not yours to vouch for. Pick the one number or promise in the draft that would cost the most if wrong. Name the paper that settles it: the measured site, the price book line, the manufacturer's published terms, the permit, the signed scope. Open it and find the line, or send the question to whoever holds it: the supplier, the manufacturer's claims desk, the building department. Nothing leaves the shop until that is done. Do it now. The promise is whether Lena's repair is covered. The paper is the snapshot's two warranty lines, which stand in for the certificate and your own labor warranty. Read both.

I found the manufacturer's parts line and wrote down its term and the month it was registered
I found the firm's labor line and the month it expired
I found the price book line for the diagnostic visit and its amount
I wrote the model and the install month next to my reply, in my notes, not in the text

Now rewrite the reply to Lena yourself, with the snapshot open

Check your own work0/4

It says what the paper shows: Manufacturer M covers parts for ten years and the furnace is registered, and the firm's one year labor warranty ended in March 2025
It does not say she is covered for this failure, and it does not say she is not. Whether a grinding blower is a defective part is Manufacturer M's call after a technician has seen it and filed the claim
It books the diagnostic visit today at the price book rate, 150, and says she pays that visit, and it gives a time she will hear from the office about the slot
Nothing in it came from the tool's first reply

Two things you can check on the open web, and should, because Manufacturer M's terms are built on them. Goodman's published warranty pages say its parts coverage runs 5 years unregistered and 10 years if the unit is registered online within 60 days of installation, with residents of California, Florida, Georgia and Quebec exempt from the registration condition. Rheem's residential water heater certificate covers labor only in the first year. Those are the real shapes: the manufacturer covers the part, for a term that depends on a registration nobody remembers doing, and the labor is yours or the customer's. Your trade's version: the electrician's panel, the roofer's shingles, the landscaper's irrigation controller, each with a manufacturer's term for the part and a separate paper for the labor. The reply must not blur the two. The claims desk decides whether the part failed. You decide that a technician is there today.

Give it the warranty and watch what it does

Go back to the same chat. This time tell it the two lines you found, and watch what it does with them.

Send this in the same chat

The furnace is a Manufacturer M unit we installed in March 2024. Manufacturer M covers parts for 10 years and the unit is registered. Our own labor warranty was 1 year and expired in March 2025. Our diagnostic visit is 150. Rewrite the reply to Lena, under 80 words, plain language.

Paste the second reply

Check your own work0/4

Given the parts term, it told Lena she is covered, or fully covered, or that the repair will be no charge. Nobody has yet looked at the furnace
It dropped the labor line, or the 150, or both, so the customer now expects a free visit
It still did not say who decides whether the part is defective, or that a claim has to be filed
The reply I will send is the one I wrote with the snapshot open, not this one

That is the shape of the whole track. The tool writes fluently about a warranty it has never read, and just as fluently about the two lines you handed it, and neither reply routes the decision to the party that makes it. If the second draft kept the labor line and the 150 and said the claims desk decides, it passed this once, and the check is the same next time. From here on the check is not whether something is true, which you often cannot answer from the truck. It is which paper settles it, and whether you have opened it.

My reply to Lena names the parts term and the expired labor warranty, books the 150 visit today, and gives no yes or no on the repair
The technician is on the board for today, or my reply says the office will confirm the slot by a time I named
I can say what the Spec Check is in one breath: the costliest number or promise, the paper that settles it, the line found or the question sent, nothing out until then

Where that leaves you

You found the line because this lesson handed you a snapshot with nothing on it a customer would recognize as theirs. Your real jobs are not like that. A real work order carries a name, a street address, a phone number, a gate code, a serial number and an exact invoice total, and the tool wants all of it. Lesson 2 is how a job goes into the tool with none of that.

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