Keep clients coming back · Every business
The Warranty and Care Card for Home Service Jobs
A one-page card that states what the company stands behind, for how long, what the homeowner should do to keep the work in good shape and how to reach someone if it fails gives customers a reason to call you back instead of the next name in the search results.
At a glance
- A warranty and care card is a single page, left at the job and sent by text or email, that puts the workmanship warranty, the manufacturer's warranty, the care steps and the contact for a callback in one place.
- Homeowners can't easily judge the quality of a repair they can't see, and research on warranties, published in the Journal of Consumer Research, found that consumers treat them as signals of quality.
- Missing paperwork can cost the homeowner real coverage; one major HVAC manufacturer gives a 10-year parts warranty only when the equipment is registered within 90 days of installation, and 5 years otherwise.
- The card takes about an hour to write per trade, and a written warranty on parts and workmanship has federal rules worth reading first.
Part 1 | A promise the customer can't see is a promise they won't remember
Most home service work disappears behind a wall, under a sink or inside a cabinet the moment the job is done, and the customer is left to trust that the new circuit, the soldered joint or the flashing on the chimney was done right. Economists call these credence goods, services whose quality the buyer can't verify even after buying them, and a review in the Journal of Economic Literature describes how that gap makes customers wary of anyone who repairs what they can't inspect. A written warranty speaks directly to that wariness, and an experiment published in the Journal of Consumer Research found that consumers' responses to warranties fit the idea that they read them as signals of quality.
The owner's first instinct is usually we stand behind our work, and everyone knows it. The trouble is that the promise lives in the technician's voice at the end of the visit and nowhere else, so when the drain backs up eleven months later the homeowner doesn't remember whether the job was covered, can't find the invoice and often calls whichever company shows up first in a search.
Part 2 | What the card says, trade by trade
A good card has six parts: the work done, with the date and the address; the company's workmanship warranty, in plain terms; the manufacturer's warranty on the equipment, with registration confirmed; three care steps the homeowner can do; the signs that mean "call us"; and one direct number or text line for warranty calls.
| Trade | Our workmanship warranty (example terms) | Care steps for the homeowner | Call us if |
|---|---|---|---|
| HVAC | Labor on this installation for [number] years | Check the filter monthly and change it when dirty; keep the outdoor unit clear; book a cooling check in spring and a heating check in fall | Water pools near the indoor unit or the system short-cycles |
| Plumbing | Labor on this repair for [number] months | Follow the manufacturer's maintenance schedule in the manual we left; know where your main shut-off is (we tagged it); keep grease and wipes out of drains | You see water stains, hear running water when nothing is on or the drain slows again |
| Electrical | Labor on this work for [number] year | Test GFCI outlets with the test button as often as the label recommends; don't overload the new circuit; keep the panel clear | A breaker trips repeatedly, an outlet feels warm or lights flicker |
| Roofing | Workmanship on this roof for [number] years | Keep gutters clear, especially after fall leaves; look at the roof from the ground after major storms; don't walk on it | You see missing shingles, stains on a ceiling or granules piling up in gutters |
ENERGY STAR advises homeowners to inspect, clean or change air filters once a month and to have the cooling system checked in spring and the heating system in fall, since contractors get busy once summer and winter arrive, so an HVAC card can name the two months the company will send a reminder. The card should also show the manufacturer's registration as done, because one major manufacturer's residential terms give 10 years of parts coverage on registered equipment and 5 years when the 90-day registration window is missed.
Part 3 | The federal rules worth knowing before you print
The Magnuson-Moss Warranty Act, which the Federal Trade Commission enforces, covers written warranties on consumer products, and the FTC's guide for businesses says it doesn't apply to warranties on services alone but does apply when a warranty covers both the replacement parts and the workmanship of a repair. When it applies, a written warranty on a product costing more than $10 must be titled "full" or "limited," and one on a product costing more than $15 must state its terms in a single, clear document available before the sale.
Two points from the FTC guide matter most for trades. A warranty generally can't require the homeowner to use a particular brand of part or a particular company's service to keep coverage, although it can exclude damage caused by parts or service the warrantor didn't provide. Sample warranties in the guide also include the sentence "This warranty gives you specific legal rights, and you may also have other rights which vary from state to state."
General information, not legal advice; talk to a licensed professional about your situation.
The handoff script at the end of the job
- Walk the homeowner to the work. "Here's what we replaced, and here's the shut-off we tagged."
- Hand over the card and name the term. "Our labor on this is covered for [number] years; it's all on this card."
- Confirm the registration. "We registered the unit with the manufacturer today; the confirmation is in the text I'm sending you."
- Point to the one care step that matters most. "The filter is the thing to watch; check it monthly."
- Send the same card by text or email before leaving the driveway, with photos of the finished work.
How you compare
- Registration: list installations from the last 90 days and check how many units are registered. Any that aren't are coverage the homeowner may lose.
- Warranty calls: count callbacks under warranty for one quarter, by trade and technician.
Questions to ask this week
What exactly do we warrant, and for how long? If two technicians would give different answers, write it down before printing anything.
Which equipment from the last 90 days is still unregistered? Register it now and send the homeowner the confirmation.
Write the card for your most common job this week, run it past your attorney, and send it with every finished job starting next month.
About this research: This article draws on the Federal Trade Commission's Businessperson's Guide to Federal Warranty Law, an experiment on warranties as quality signals published in the Journal of Consumer Research, a review of credence goods in the Journal of Economic Literature, ENERGY STAR's maintenance checklist and one manufacturer's published residential warranty terms. Warranty terms vary by manufacturer and state law.
Sources
- Federal Trade Commission. Businessperson's Guide to Federal Warranty Law.
- Boulding, W. and Kirmani, A. A Consumer-Side Experimental Examination of Signaling Theory: Do Consumers Perceive Warranties as Signals of Quality? Journal of Consumer Research 20(1), 1993.
- Dulleck, U. and Kerschbamer, R. On Doctors, Mechanics, and Computer Specialists: The Economics of Credence Goods. Journal of Economic Literature 44(1), 2006.
- ENERGY STAR. Maintenance Checklist. U.S. Environmental Protection Agency.
- Carrier. Warranty Registration and Information. Residential warranty terms, accessed October 2026.
Related reading: What to Leave Behind After a Service Call So Customers Call You Back · Maintenance Plans: How to Set One Up for a Service Business · The Agreements Every Small Service Business Should Have in Writing · Invoices That Get Paid Faster: What to Include and When to Send
Work with osNOVA on the paperwork that brings customers back
We help home service companies write the warranty and care card for each kind of job, set up registration and reminders so nothing lapses, and train technicians on the two-minute handoff, starting from what you want more of, whether that is more repeat calls, more maintenance plan members or fewer customers who forget your name.
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