HVAC warranty claim mistakes checklist

Published 6 October 2026. Updated 6 October 2026.

Warranty money tends to leak in the same handful of places. None of them is hard to fix, but all of them need a habit, because the failure is quiet: nothing tells you a claim lapsed. This checklist is meant to be run on every job where a part fails under warranty.

It pairs with the step by step filing guide and with the guide to checking equipment warranty status.

Mistakes that happen on the job site

1. No rating-plate photo

Without a photo of the plate, the serial number is whatever someone typed from memory or copied from an old invoice. Coverage is looked up by model and serial, so a typo in the serial can get a claim returned. Photograph the plate before touching the unit.

2. A serial number that is partly unreadable

Plates fade, get painted over and get buried behind panels. Take two photos, one wide and one close, and write the number in the job notes while you are looking at it. If the plate is truly unreadable, say so in the note so the office does not guess.

3. A failure note that says nothing

"Replaced bad board" tells the office nothing about why the board was bad. Include the symptom, what you measured, and what ruled out the other causes. A note with a test result gives the office a failure narrative it can stand behind.

4. Failed part thrown away

Some programs ask for the failed part back, so keep it until the claim is settled. A part tossed into the truck bin on Tuesday is gone by Friday. Tag it with the job number and keep it in one place.

Mistakes that happen in the office

5. Confusing the coverage term with the filing window

A part can be inside its ten-year term and the claim can still be dead because the filing window closed. Track the two dates separately: install date plus term, and repair date plus the route's days.

6. Assuming the same window for every route

A manufacturer portal and a distributor form can give you different numbers of days. Ferguson's HVAC warranty page, for example, says 30 days from the repair date, and other routes set their own numbers. Keep a list of routes and their windows, and check it against your agreement once a year.

7. Not knowing whether the unit was registered

Many manufacturers give a longer parts term when the equipment is registered within a set period after installation, and a shorter one when it is not. If nobody recorded whether registration happened, the office cannot know which term applies. Record it at install, and when it is blank, treat the claim as needing a check rather than guessing.

8. Claiming labor that the term does not cover

Parts terms are often much longer than labor terms. Labor claimed after the labor term, or above a stated hour allowance, will not be paid and can send an otherwise good parts claim back for correction. Read the labor line separately every time.

9. Wrong equipment on the wrong form

Water heaters, boilers and HVAC equipment may go through different routes or forms. Ferguson's HVAC form, for one, covers HVAC equipment, so a water heater claim belongs on a different route. Match the equipment type to the route before you fill anything in.

10. Filing and forgetting

A filed claim is not a paid claim. Record the reference number, the amount and the date, and set a follow-up. Without it, a short payment or a lost submission looks exactly like a closed job.

The one-page checklist

Print this or paste it into your job template.

1. Rating-plate photo taken, serial readable and typed in the notes.
2. Photos of the failed part in place and removed.
3. Failure note with symptom, test result and conclusion.
4. Install date on record.
5. Registration status on record, or marked unknown.
6. Part is on the covered list, checked.
7. Coverage end date written down.
8. Filing route chosen, and its window in days known.
9. File-by date written down, counted from the repair date.
10. Labor claimed only if inside its own term and allowance.
11. Failed part tagged and held.
12. Claim filed, confirmation saved, follow-up date set.

If an item cannot be ticked, the claim goes in a "needs a check" list that someone owns, with a date to resolve it by.

How WrenchClaim does this step

WrenchClaim covers items 4, 5, 7, 8 and 9 of that list on a job export. You upload the export (CSV, Excel, Word, PDF or a photo), your technician notes and a rating-plate photo per job. Code does every date calculation. Each job comes back as eligible with days left, lost, not eligible, unsupported brand or needs check, with the reasons written out, for example an unknown registration or a water heater that is not on Ferguson's HVAC form. It does not check a part against a per-component list (item 6) or work out labor (item 10).

It also produces a 12-month leak report that lists claims whose window already closed, with a parts-cost estimate. The report shows what was lost. It is not a promise that anything can be recovered, and a closed window usually means the claim is gone.

WrenchClaim does not file claims and does not log into manufacturer or distributor portals. You file each packet yourself. Its built-in terms are marked unverified until confirmed, so check them against your own paperwork or upload your own terms table. A second AI model reviews every result and lists what is left for you to decide. One uploaded job costs 12 credits and there is no subscription. Sign up to see where your recent jobs stand.

Questions

How often should the office review open warranty claims?

Weekly is a sensible rhythm. Filing windows are measured in days, so a monthly sweep means some claims will already be past the deadline when you look at them.

Should technicians or the office own warranty paperwork?

Technicians own the evidence: plate photo, failure notes and the part. The office owns the filing and the deadline. Splitting it that way keeps either side from assuming the other has it covered.

Is it worth filing small claims?

Usually, because the part cost is real money, but a small claim takes the same office time as a large one. Measure how long a claim takes your office, then set a threshold and apply it consistently.