The exclusions section is where most claim denials originate. Every home warranty contract has a coverage section that sounds good and an exclusions section that takes much of it back. Understanding the exclusions before you buy is how you avoid the coverage gaps that produce the most frustrating disputes.
Legal information only, not legal advice.
Home warranty contracts give coverage in one section, then take it back in another:
Coverage section: “We cover your HVAC system, including your heating unit, air conditioning unit, ductwork, and related components.”
Exclusions section: “This warranty does not cover: (a) pre-existing conditions, (b) failures caused by improper installation, (c) failures caused by improper prior repair, (d) failures caused by inadequate maintenance, (e) failures caused by rust or corrosion, (f) failures caused by sediment buildup, (g) secondary damage, (h) code upgrades required at time of repair, (i) permit fees, (j) modifications required to accommodate replacement units of different specifications…”
What looked like broad HVAC coverage now has 10 carve-outs that can apply to most real-world HVAC failures.
These exclusions appear in virtually every home warranty contract regardless of company or plan:
Pre-existing conditions. Failures caused by conditions that existed before the policy start date. This is the most commonly abused exclusion. See the detailed discussion below.
Improper installation. Systems or appliances installed incorrectly are excluded. Since many homeowners don’t know who installed what or when, this can be applied broadly.
Improper prior repair. Any prior repair that wasn’t done to industry standards creates an exclusion. Again, homeowners often don’t know the complete repair history of their systems.
Lack of maintenance. Failure caused by inadequate maintenance is excluded. HVAC companies require annual maintenance for coverage; many contracts require proof of maintenance for HVAC claims.
Cosmetic damage. Scratches, dents, rust on surfaces - visual damage without functional impact.
Secondary damage. Water damage caused by a pipe leak, food spoilage from a failed refrigerator - the downstream consequences of a covered failure, not just the failure itself.
Permits and code upgrades. When a system is replaced, building codes may require upgrades or permits. These costs are excluded and fall entirely on the homeowner.
Haul-away and disposal. The cost of disposing of replaced equipment (significant for HVAC units and appliances).
Modifications. If the replacement unit requires modifications to fit the existing space or connections, the modification cost is excluded.
HVAC claims drive the most disputed exclusions:
Freon/refrigerant. Many plans limit refrigerant recharging or exclude it entirely. Refrigerant leaks are a common HVAC failure.
Ductwork limitations. Coverage for ductwork often has significant limitations - repair only (not replacement), limited linear footage, or exclusion of inaccessible ductwork.
Maintenance records requirement. Companies increasingly require documented annual maintenance for HVAC coverage. No maintenance records = potential denial.
Rust and corrosion exclusion. This one is significant in humid or coastal markets. Corrosion causes significant HVAC failures in these markets, and companies that include this exclusion are worth avoiding if you’re in FL, GA, SC, NC, LA, TX Gulf Coast, or any humid/coastal area. AHS is notable for covering rust/corrosion - a meaningful differentiator.
Outdoor units exposed to weather. Some policies limit or exclude damage to outdoor condensing units from weather events that aren’t covered perils.
Cosmetic damage. Dents, scratches, rust on surfaces.
Racks, shelves, and interior liners. Common refrigerator/dishwasher components that are explicitly excluded.
Filters and consumables. Water filters, air filters, light bulbs - consumable components.
Knobs, dials, and handles. Broken but non-functional cosmetic controls.
Damage from overloading. Washer/dryer damage from overloading may be excluded as misuse.
Manufacturer defects. Appliance failures due to manufacturer defects may be excluded if the appliance is under manufacturer warranty.
Well pumps and septic systems. Often excluded from basic plans; may be available as add-ons.
Irrigation systems. Typically excluded from standard coverage.
Shower pans and drain lines outside the home’s foundation. Location-based limitations.
Water damage. The water damage resulting from a plumbing failure is not covered - only the plumbing repair itself.
Fixtures and faucets with aesthetic damage. Functional plumbing covered; cosmetic faucet replacement generally not.
The most frequently abused exclusion deserves extended attention.
How it’s supposed to work: If you buy a home warranty knowing your HVAC is on its last legs and it dies within weeks, the exclusion is appropriate. You knew about a pre-existing problem and you shouldn’t get coverage for it.
How it gets abused: The company sends a contractor who notes “evidence of deferred maintenance” or “rust consistent with long-term operation” or “refrigerant level low consistent with slow leak.” These observations get used to deny coverage on systems that were functioning at policy inception, have no documented prior problems, and failed in normal use.
The documentation defense: Your best protection against pre-existing condition denials is documentation showing the system was operational at policy inception: inspection report (especially recent), HVAC service receipt, seller disclosure showing no known issues. See the claims section for full defensive strategy.
California’s stronger standard: California regulatory guidance limits pre-existing condition exclusions to conditions actually known to the consumer at time of purchase. The theoretical “discoverable on reasonable inspection” standard that companies often use is inconsistent with California’s consumer-protection approach.
Get the full sample contract, not the marketing brochure. Most companies provide a sample contract PDF on their website. Download it. Read the entire exclusions section.
Ask the specific question about your specific concern. If you have a 15-year-old HVAC, ask the company specifically: “What would you need to see to cover HVAC replacement if the unit fails?” Get the answer in writing if possible.
Compare exclusion language, not just coverage lists. Two companies may both say “we cover HVAC.” Compare what each company excludes from HVAC coverage. The company with fewer exclusions provides better effective coverage.
Specific exclusions that are dealbreakers in your market:
Rather than reproduce full exclusion language (which changes), the high-level patterns:
Companies with notably broad exclusions: Some budget-tier companies have exclusion sections that are nearly as long as the coverage sections. Compare total contract length as a rough proxy - a 40-page contract with 25 pages of exclusions warrants scrutiny.
Companies with narrower exclusions: Old Republic and Landmark tend to have cleaner contract language with fewer manufactured exclusion pathways. 2-10 HBW’s structural warranty background informs a more precise contract.