Your mother sends you a photo of the furnace quote from St. Louis. The page names the equipment, promises a long warranty and has a line waiting for her signature. The salesperson says the crew can come soon.
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The question is not whether the warranty sounds generous. The question is what happens when the furnace stops heating and you are several states away.
A strong promise in large type can sit beside exclusions that move the actual work back onto your mother. Parts may be covered while labor is not. Registration may be required. Maintenance records may matter. The installer may offer its own labor coverage, separate from the manufacturer’s warranty. A service contract may appear on the quote as though it were part of the warranty.
Do not try to settle this by asking, “Is everything covered?” Make the paperwork describe one ordinary failure from the first phone call through the completed repair.
Start with the exact equipment
Ask the contractor for a clean copy of the proposal before anyone signs. It should identify the furnace by manufacturer and full model number, not just by brand, efficiency description or product line. If another major component is being replaced, that component needs its own model number too.
Then compare the proposal with the warranty document for that exact model. The Federal Trade Commission says written warranty terms should be available before a consumer buys a covered product. If the contractor sends a brochure instead of the warranty, ask again for the document that states the coverage, exclusions and claim process.
Look for substitutions. A proposal may allow “equivalent” equipment if the quoted model is unavailable. That language makes the warranty difficult to evaluate because you do not yet know what will be installed. Ask the contractor to require written approval from your mother before substituting a different model.
Separate the three promises
Put three headings on a sheet of paper: manufacturer warranty, installer warranty and service contract. Do not let them blur together.
The manufacturer warranty usually concerns the equipment or particular parts. The installer warranty concerns the contractor’s workmanship or labor. A service contract is separate coverage that may add maintenance or repair obligations. The FTC distinguishes a warranty included with a product from a service contract sold separately.
Under each heading, copy the answers to the same questions:
Who makes the promise? What exactly is covered? What is excluded? When does coverage begin? What ends it? Who must be called first? Who supplies the part? Who pays for diagnosis, labor, travel and removal of the failed part? Is prior approval required before another company touches the system?
If the answer exists only in a salesperson’s text message or phone call, ask for it in the proposal or warranty. The FTC advises consumers to put spoken promises in writing. You are not being difficult. You are making the signature page match the sale.
Follow one failed part through the paperwork
Choose a plain example: the furnace stops producing heat and the installer says a covered part failed.
Ask the contractor to walk through the sequence in writing. Does your mother call the installer or the manufacturer? Does the installer diagnose the problem before confirming coverage? Is the replacement part covered while the diagnostic visit and installation labor remain her responsibility? Who orders the part? Can the installer charge for handling or shipping? What happens if the manufacturer rejects the claim?
Now test a second path: the installer is unavailable, has stopped serving the area or no longer operates. Can another authorized contractor perform the warranty work? Does using another contractor affect the installer’s promise? The name and contact information for the party that backs each promise belong in your folder.
A warranty length by itself tells you very little. A usable warranty tells you who answers, what proof is required and which parts of the repair remain outside the promise.
Find every condition your mother must keep
Search the warranty for “must,” “required,” “excluded,” “void,” “register,” “maintenance,” “original owner” and “transfer.” Those words often reveal the work assigned to the homeowner.
Ask whether the equipment must be registered, who will register it and how your mother will receive confirmation. Do not accept “we take care of that” without a completed record. Ask whether maintenance is required, how often it must occur and what documents prove it occurred. If particular filters, parts or service providers are required, have the contractor point to the exact clause.
Also ask whether the warranty stays with the house or only with the buyer named on the paperwork. You do not need to predict a move. You only need to know whether the contract makes ownership relevant.
Create a small warranty record with the installed model and serial numbers, installation address, installer contact, registration confirmation and maintenance receipts. A photo of the equipment label after installation can settle a later mismatch between the quote and the unit in the basement.
Make the quote say what the crew will do
The warranty is only one page of the decision. The quote should also describe the work that produces a finished installation.
Look for removal of the old equipment, disposal, connections, controls, venting, drain work, electrical work, startup testing and restoration of any surfaces the crew opens. If the proposal says “as needed,” ask who decides and whether that work is already included in the agreement.
Ask how a change will be approved if the crew finds something different after opening the system. A useful change process states what changed, why it changed, how it affects the work and whose approval is required before the crew proceeds. Put your own name in the call chain if your mother wants you involved, but do not assume that your approval replaces hers.
Compare competing quotes by scope, not by the size of the warranty headline. Put the same rows beside each proposal: exact equipment, removal, permit, inspection, controls, venting, cleanup, startup test, labor coverage, exclusions, registration and first contact after a failure. Blank cells are questions, not savings.
Name the permit and inspection owner
If the home is inside the City of St. Louis, the city says a mechanical permit is required for furnace installation and that the permit is issued to a licensed mechanical contractor certified by the city. Ask the contractor to state in the agreement who obtains the permit, who schedules the inspection and who corrects work if the inspection does not pass.
Do not rely on “permit included” alone. Ask for the permit identifier after it is issued and the inspection result after the work is complete. If the house has a St. Louis mailing address but is outside the city, ask the contractor which local authority has jurisdiction and how you can verify the permit requirement there.
This is a paperwork check, not a request for your mother to supervise mechanical work. The contractor owns the installation. Your folder should show that the public steps attached to the installation were closed.
Control the signature copy
Before your mother signs, ask for the complete contract as one file. It should include every page referenced by the signature page, including warranty terms, cancellation language, financing papers if any, service contract terms and attachments. Check for blank spaces, unchecked options and web links that lead to terms not included in the file.
The Missouri Attorney General recommends written agreements that describe the job, completion expectations and the full agreement. The FTC likewise advises putting the contractor’s identity, work, timing and promises in the written contract.
If the salesperson changes a term by hand, your mother and the contractor should each receive the same final version. Save the signed copy before work begins. A photo of only the signature page is not the contract.
Build the handoff before the crew leaves
Ask a local person to photograph the installed equipment label, thermostat screen, permit document and the area around the furnace. Have that person watch the contractor show your mother how to change the filter, adjust the thermostat and identify the company to call. The local person is documenting the handoff, not judging whether the mechanical work is correct.
Before final acceptance, request the invoice, warranty documents, registration confirmation, permit record, inspection result, model and serial numbers, maintenance instructions and service contact. Put the next maintenance responsibility on a calendar owned by a named person.
If you need someone in St. Louis to gather these records or be present for the handoff, define that assignment narrowly. The person should return a specific set of photos and documents, plus any unresolved promises. The site’s page on local help for a St. Louis parent explains how local eyes can support a daughter who cannot be in the house.
This guide draws on consumer guidance from the Federal Trade Commission, home repair guidance from the Missouri Attorney General and mechanical permit information from the City of St. Louis. The publication keeps its public-source list on the Sources page.
What to do tonight
Ask your mother not to sign the current photo. Request the complete proposal, the warranty for the exact model and every attachment referenced by the signature page. Make your three-column sheet for the manufacturer warranty, installer warranty and service contract. Send the contractor one failed-part example and ask who answers the call, who performs the work and which charges are outside each promise.
Then create one folder with two sections: “before signing” and “after installation.” Put the unsigned proposal and your open questions in the first. Reserve the second for the signed contract, equipment labels, registration, permit, inspection, invoice, maintenance record and repair contacts.
What to leave with the doctor
Leave the furnace contract out of the medical visit. If the heating problem is affecting where your parent can safely spend time or whether she can remain in the house during the work, give the doctor only the practical situation and ask what needs to be considered for her care. Leave equipment selection, warranty coverage, permits and contractor performance with the contractor and the written agreement.