Manufacturer Warranty Pass-Throughs for Contractors

The customer does not care whose warranty it is when the equipment fails.

The homeowner bought the HVAC system from you. The restaurant owner paid your invoice for the tankless water heater. The roofing customer remembers the sales conversation about "lifetime shingles." The pool owner has a pump with a brand warranty and a leak near the union. Nobody starts the phone call by separating manufacturer defects, workmanship, diagnostics, access, labor, freight, code upgrades, and maintenance records.

That separation is your job before the job starts.

A manufacturer warranty pass-through is useful only when the customer can see what the brand promised and what your shop promised. If your quote estimate says "10-year warranty included" with no split between product and labor, you may spend the next decade explaining a sentence that should have been fixed before signature.

Use the contract agreement, purchase order, delivery note or packing slip, completion certificate, service report, and warranty document to make the split impossible to miss:

• the brand stands behind the product only to the extent its written warranty says so;
• your shop stands behind installation workmanship only to the extent your written workmanship warranty says so;
• registration, serial numbers, startup records, photos, maintenance duties, and proof of purchase decide whether the claim is easy or messy;
• labor, diagnostics, shipping, tear-off, reinstallation, access work, finish repair, permit updates, and code upgrades are not automatically free just because a part is under warranty.

For the broader workmanship-warranty structure, start with Contractor Warranties: One Year, Two Years, Workmanship, or Manufacturer Pass-Through?. This article goes deeper on the pass-through part: product warranties from brands you sell or install but do not control.

Pass-through does not mean "we guarantee the brand"

A clean pass-through clause says you will give the customer the manufacturer warranty rights, documents, serial numbers, and claim help that are actually available. It should not say you personally guarantee the manufacturer's decision.

Use this distinction:

That table should shape the sentence you use in your quote:

Manufacturer warranties on products, materials, equipment, fixtures, and components are passed through to the customer to the extent available from the manufacturer. Contractor will provide product information and installation records in its possession. Unless this agreement states otherwise, manufacturer warranty claims do not include Contractor labor, diagnostics, removal, reinstallation, shipping, disposal, access work, finish repair, temporary equipment, code upgrades, or trip charges after Contractor's workmanship warranty expires.

Have local counsel tune the final version. The drafting move is the point: pass through the brand's promise without swallowing every cost around it.

Federal warranty rules are product rules, not a blanket contractor rule

The FTC's Businessperson's Guide to Federal Warranty Law explains that the Magnuson-Moss Warranty Act covers written warranties on consumer products, not oral warranties or service-only warranties. The same guide gives contractors the trap: a warranty that covers both repair parts and the workmanship used to make the repair can fall inside the Act even though a workmanship-only service warranty may not.

That matters when you install or repair consumer products: HVAC equipment, water heaters, appliances, windows, doors, roofing materials, pool pumps, solar components, garage equipment, fixtures, controls, and similar items normally used for personal, family, or household purposes.

Do not overread that into a national construction warranty answer. A remodel contract, commercial job, service-only callback, state statutory warranty, UCC goods issue, or licensing-board complaint may be controlled by other rules too. But when a product warranty is part of the sale, the FTC framework is a useful checklist.

16 CFR Section 701.3 says written warranties on consumer products over $15 must clearly disclose, in simple language, who gets the warranty, what is covered and excluded, what the warrantor will do, when the warranty starts and how long it lasts, the step-by-step claim procedure, dispute-settlement information when used, implied-warranty limits, consequential-damage limits, and the familiar state-law rights notice.

For a contractor, that list becomes a paperwork standard:

• name the product and covered components;
• name the brand, not just "manufacturer";
• identify the model and serial number;
• say whether the brand covers parts only, parts and labor, or another mix;
• state the date the brand warranty starts;
• attach the claim procedure;
• preserve proof of installation and purchase;
• state what your shop does not cover around the brand claim.

16 CFR Section 702.3 also matters for sales behavior. For covered consumer products, warranty terms need to be available before purchase. Your field version is simpler: if the warranty limit would change the customer's decision, do not save it for closeout.

Put a link or copy in the quote packet, then hand over the final warranty packet after installation.

Registration is a job task, not an afterthought

Registration creates more customer disputes than it should.

Trane tells homeowners that a dealer may register products for them, but also says not to assume the dealer is doing it. Its warranty page describes a typical split: a base limited warranty when the product is not registered, a longer registered limited warranty when registration is completed within the stated window, and labor coverage only under selected optional extended warranty plans.

Carrier's residential warranty page shows a different current structure for eligible replacement equipment: timely registration can let the customer select either a 10-year parts-only option or a 5-year parts plus 3-year labor option, with dealer participation required for the labor option. Carrier also notes that jurisdictions where warranty benefits cannot be conditioned on registration are treated differently.

Florida now makes that last warning very concrete for HVAC. Florida Statutes Section 559.957 says the full length of a manufacturer's, distributor's, or retailer's warranty for an HVAC system or component is effective in Florida on the installation date if installed by a contractor licensed under part I of chapter 489, and it says offered HVAC warranties may not be conditioned on product registration. Section 559.956 separately says that, for residential property conveyed on or after July 1, 2024, an in-effect HVAC manufacturer warranty automatically transfers to the new owner, does not get extended by the transfer, and cannot be subject to a transfer fee.

That is not a national HVAC rule. It is a warning that state law can change the registration and transfer answer. If you work across state lines, your HVAC contract agreement and HVAC service report cannot treat every manufacturer's form as the whole story.

Make registration responsibility explicit:

The worst version is silence. If your salesperson says "we register everything" and the office does not, the warranty dispute will land on you even if the brand caused the product failure.

Labor is where the surprise bill lives

Most customers hear "under warranty" as "no bill."

Manufacturer documents often say something narrower.

Trane's base limited warranty document says the company will furnish a replacement part for installation by a licensed HVAC service provider when a covered part fails due to a manufacturing defect under normal use and maintenance. It then excludes labor costs, including diagnostic calls and removal or reinstallation, along with shipping and freight expenses.

Rheem's tankless residential warranty example is more mixed. It lists heat-exchanger, parts, and certain one-year labor periods depending on installation type, but its labor section still excludes general service, inspection, reinstallation, permits, removal and disposal of the failed unit or part, and updates needed to meet manufacturer or local code requirements.

GAF's shingle warranty example shows another structure. During its named non-prorated protection period, it says GAF will pay reasonable labor to repair or re-cover defective GAF products and provide replacement products or the reasonable cost of replacement products, but it excludes items such as non-GAF accessories, metalwork, or flashing in that labor description and says it will not pay tear-off or disposal in that cited section.

Those are not recommendations for your shop. They are examples of why "manufacturer warranty included" is too vague.

Use a roofing warranty, construction warranty, plumbing service report, or pool service report to record the labor answer trade by trade:

Customers can accept limits when the limits are visible before signature. They feel cheated when the first clear explanation appears after the compressor fails.

Do not promise "authorized only" more broadly than the law allows

Contractors sometimes try to simplify warranty risk with a hard sentence:

"Warranty is void if anyone else services the unit."

Be careful.

FTC guidance and 16 CFR Section 700.10 warn against tying a consumer-product warranty to the use of only authorized service or authorized replacement parts for non-warranty service and maintenance unless those parts or services are provided free under the warranty or the warrantor has an FTC waiver. The rule also says a warrantor can still exclude defects or damage caused by unauthorized articles or service and can deny liability when it can show the defect or damage was caused that way.

That distinction matters.

Bad sentence:

Warranty is void if anyone other than Contractor services the equipment.

Cleaner sentence:

Contractor is not responsible for defects, damage, unsafe conditions, performance problems, or additional labor caused by third-party service, unauthorized alteration, improper maintenance, improper parts, or work not performed by Contractor. This does not limit any manufacturer warranty rights the customer may have under the manufacturer's written warranty or applicable law.

That does not make the sentence perfect in every state. It points in the right direction: exclude damage you did not cause, not every customer choice.

For maintenance-heavy work, pair this with a service report that records filter condition, water chemistry, refrigerant notes, drain condition, roof penetrations, customer-supplied parts, or other facts that decide whether the defect was product, workmanship, maintenance, or outside damage.

The pass-through file should be built at closeout

Do not wait for the failure.

The closeout packet should let a customer, manufacturer, distributor, adjuster, lawyer, or future employee answer the claim basics without calling the installer from memory.

For equipment or materials with a brand warranty, save:

1. Signed contract agreement and approved scope.
2. Approved change orders that changed product, labor, or warranty terms.
3. Supplier purchase order, invoice, receipt, or delivery ticket.
4. Product model numbers, serial numbers, batch numbers, color codes, lot numbers, or warranty IDs.
5. Photos of rating plates, cartons, labels, tags, installed product, startup screen, and completed work.
6. Installation date, startup date, substantial completion date, and customer use date.
7. Registration confirmation or customer registration instructions.
8. Manufacturer warranty copy or link.
9. Maintenance instructions and owner duties.
10. Inspection, startup, commissioning, or test record.
11. Final completion certificate.
12. Your general warranty or trade-specific warranty.
13. Final receipt or paid invoice.

This is not paperwork for paperwork's sake. It keeps a future callback from turning into a scavenger hunt.

If the claim comes in years later, the useful answer is specific:

The air handler was installed at 12 Oak Street on May 16, 2026. Here are the model and serial numbers, registration confirmation, startup report, invoice, manufacturer warranty, and our workmanship warranty. The manufacturer's warranty appears to cover covered parts only. Diagnostic labor and access work are outside our workmanship warranty after May 16, 2027 unless the brand or an extended labor plan accepts them.

That is a very different conversation from "I think it has ten years."

Watch the date the warranty starts

Manufacturer warranties do not always start on the date you would choose.

Some start on purchase. Some start on installation if documented. Some use manufacture date plus an extra period if the owner lacks proof. Some have special rules for replacement parts. Some treat new construction differently from replacement work. Some depend on product registration, except where state law says that condition cannot reduce the warranty.

Rheem's tankless warranty example says the effective date is the original installation date if properly documented; otherwise it uses the manufacture date plus 90 days. Trane's HVAC document describes a commencement date and says the company may request proof of product purchase or installation. These details are dull until the unit fails near the end of the term.

Your job file should preserve all possible date anchors:

• purchase date;
• delivery date;
• installation date;
• startup date;
• inspection date;
• substantial completion date;
• customer use date;
• registration date;
• transfer date if the property sells;
• failure report date;
• claim submission date.

The daily report log, construction inspection report, startup sheet, service report, warranty, and completion certificate should tell the same story. If the date may matter for longer liability, pair this file with Statutes of Repose vs. Statutes of Limitations: The Job Dates Contractors Need to Keep.

Customer-supplied products need an even harder boundary

Customer-supplied fixtures, equipment, tile, appliances, fans, lights, pumps, faucets, cameras, smart-home devices, and bargain online parts create pass-through problems because you may not be the seller and may not have the purchase account.

If the customer bought it, your paperwork should say:

• whether you inspected the product before installation;
• whether you are responsible for missing parts, defects, shipping damage, wrong size, incompatibility, or wrong model;
• whether your labor warranty covers installation only;
• whether removal and reinstallation are billable if the product fails;
• whether the customer handles the manufacturer claim;
• whether delays caused by replacement product availability extend the schedule;
• whether the customer pays for additional parts needed to make the product safe or code-compliant.

This belongs in the quote and contract, not in the argument after the faucet leaks.

A practical customer-supplied-material line:

Customer-supplied products are installed at customer's risk as to product selection, defects, missing parts, warranty eligibility, shipping damage, and manufacturer approval. Contractor's workmanship warranty, if any, applies only to Contractor's installation labor and does not include product replacement, manufacturer claim handling, removal, reinstallation, delay, access work, finish repair, shipping, or trip charges unless stated in a signed change order or warranty.

If that sounds strict, make the customer choose before the job starts. You can also offer to supply the product yourself at a price that includes procurement, submittal, warranty documentation, and normal vendor handling. That is a scope and margin decision, not a favor.

A warranty claim should start with classification

When the customer calls, classify the claim before promising a remedy.

Use a simple intake:

Then send the right crew note:

• "Manufacturer parts claim only; bill diagnostic labor unless the brand or labor plan accepts it."
• "Possible workmanship issue; inspect under our warranty procedure."
• "Maintenance or owner-operation issue; document condition and quote repair if not covered."
• "Customer-supplied product issue; document installation condition and direct customer to seller or manufacturer unless we agreed otherwise."
• "Emergency mitigation; protect property first, reserve coverage decision until inspection."

Use a work order for the trip and a service report for the result. The report should say whether the visit was warranty, manufacturer support, goodwill, emergency mitigation, maintenance, or billable service. If you skip that label, the customer may later call every return visit "warranty work."

The contract sentence should match the closeout packet

A pass-through clause cannot save a sloppy handoff.

If the contract says manufacturer warranties are passed through but your closeout packet has no warranty link, no serial number, no registration confirmation, and no startup record, the customer will treat you as the missing paperwork. If your sales page promises "10-year parts and labor" but the brand warranty is parts-only and your shop covers labor for one year, the customer will remember the sales page.

Line up the documents:

This is also why Change Orders: Get the Signature Before You Pick Up the Tool matters. A product substitution can change the warranty. A customer-declined accessory can change the warranty. A hidden condition can change the warranty. A schedule slip can change registration timing. Put that in the change order, not in a later memory.

The cleanest promise is narrow and useful

Customers do not need you to pretend every brand warranty is simple. They need you to explain the split before they buy.

Tell them what product warranty exists. Tell them where to read it. Tell them who registers it. Tell them what labor is included and what labor is not. Tell them what maintenance records they need. Tell them what happens if they sell the property. Tell them whether your shop will help file the claim and whether that help is free, included only during your workmanship term, or billable later.

Then build a file that proves it.

A small contractor can look more professional than a much larger competitor by handing over a plain closeout packet: contract, receipt, product list, serial photos, registration proof, manufacturer warranty, workmanship warranty, maintenance instructions, and service contact.

That packet protects the customer from confusion and protects you from accidental promises.

If the product fails, you are not arguing from a slogan. You are following the paperwork you wrote.

Sources

• Federal Trade Commission, Businessperson's Guide to Federal Warranty Law, including the sections on consumer products, service-only warranties, parts-plus-workmanship warranties, full and limited warranties, implied warranties, tie-in sales, and pre-sale availability
• Federal Trade Commission, Magnuson-Moss Warranty Federal Trade Commission Improvements Act, including the summary of warranty disclosure standards, full-warranty standards, implied-warranty limits, consumer remedies, service contracts, and the E-Warranty Act update
• 16 CFR Section 701.3, Written warranty terms, Federal Trade Commission rule text in eCFR
• 16 CFR Section 702.3, Pre-sale availability of written warranty terms, Federal Trade Commission rule text in eCFR
• 16 CFR Section 700.10, Prohibited tying, FTC interpretive rule text hosted by Cornell Legal Information Institute
• FTC Staff Warns Companies that It Is Illegal to Condition Warranty Coverage on the Use of Specified Parts or Services, Federal Trade Commission, April 10, 2018
• Trane Warranty and Registration and Trane Base Limited Warranty PDF, examples of HVAC registration, transfer, parts, labor, maintenance, and claim terms
• Carrier Home HVAC Warranty Registration and Coverage, example of registration timing, 10-year parts-only versus 5-year parts plus 3-year labor options, dealer participation, and state-law caveats
• GAF Shingle and Accessory Limited Warranty PDF, example of product, labor, prorated, transfer, and exclusion language for roofing materials
• Rheem Residential Tankless Gas Water Heater Certificate of Limited Warranty PDF, example of installation-date proof, component periods, limited labor coverage, water-quality exclusions, and claim documentation
• Florida Statutes Section 559.956, Transfers of HVAC system manufacturer warranties, and Florida Statutes Chapter 559, including Section 559.957 on HVAC registration and warranty conditioning, Florida Senate

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This article is for general information and is not legal, tax, or compliance advice. Verify all rules with your local authority, attorney, or CPA before acting.