Yes — a home warranty covers a tankless water heater when the unit fails from normal wear and tear, and tankless systems are included under the systems coverage of most whole-home plans. Through a plan from Empire Home Protect, coverage is provided for the working parts of an installed tankless unit — the heat exchanger, igniter, control board, and gas valve — once the waiting period ends. You pay a flat service fee per visit instead of the full repair bill. Mineral scale, improper installation, and cosmetic damage are the usual reasons a tankless claim is denied.
Key Takeaways
- A home warranty covers a tankless water heater’s mechanical failure from normal wear, including the heat exchanger, igniter, and control board.
- You pay a flat service fee per visit — usually $75 to $125 — rather than the full repair or replacement cost.
- Tankless repairs average about $600 and can reach $1,950, which is why wear-and-tear coverage matters for these units.
- Claims are most often denied for mineral scale, missing maintenance records, or conditions that existed before the plan started.
- Descaling the unit once a year is the single best way to keep a tankless water heater eligible for coverage.
What Does a Home Warranty Cover on a Tankless Water Heater?
A home warranty covers a tankless water heater by paying to repair or replace its failed internal parts when they break down from normal use. The protected pieces are the mechanical and electronic components that actually make hot water — not the plumbing around the unit, and not problems caused by neglect or a bad install.
Covered components on a working tankless unit typically include:
- Heat exchanger
- Burner and igniter assembly
- Control board and circuit boards
- Gas valve and flow sensor
- Thermostat and internal wiring
- Venting components, where the plan specifies
Coverage works the same whether the unit is gas or electric. For a side-by-side look at how tank and tankless models are handled, see our guide on whether a home warranty covers your water heater.
What a Tankless Water Heater Warranty Does Not Cover
Exclusions are the failures a home warranty will not pay for, and on a tankless water heater they center on damage a homeowner could have prevented. Mineral scale, botched installation, code upgrades, and failures tied to poor maintenance fall outside normal wear and tear, so they are routinely denied.
- Mineral and scale buildup from skipped annual descaling
- Improper, undersized, or non-code installation
- Pre-existing conditions present before the plan started
- Cosmetic damage such as dents or discoloration
- Water damage to floors, walls, or belongings around the unit
- Permits and code upgrades required to pass inspection
- Damage from floods, storms, or other acts of nature
Many of these overlap with the reasons claims get rejected across every system, which we break down in our list of how coverage applies to similar heating equipment.
How Much Does Tankless Water Heater Repair Cost?
Tankless water heater repair cost is the out-of-pocket amount to fix a failed unit, and it runs higher than tank-style repair because of specialized parts and labor. Most tankless repairs average about $600, with a typical range of $75 to $1,300 and complex jobs reaching $1,950, according to HomeAdvisor.
| Tankless repair or service | Typical cost (2026) |
|---|---|
| Minor part (fuse, pilot, pressure relief valve) | $75 to $200 |
| Igniter or flow sensor | $150 to $500 |
| Control or circuit board | $350 to $600 |
| Heat exchanger | $500 to $1,500 |
| Full replacement, installed | $1,125 to $4,500 |
| Annual descaling service | $80 to $150 |
A tankless water heater lasts 20 years or more — well past the 10-to-15-year life of a tank model, per the U.S. Department of Energy guide to demand water heaters. Over that span, a single covered heat-exchanger or control-board failure can cost more than several years of plan fees, which is the math behind systems coverage.
How to File a Tankless Water Heater Warranty Claim
Filing a claim is the process of reporting a failure and having a technician diagnose it under your plan. With Empire Home Protect you open the claim, pay a flat service fee, and an independent service technician is assigned to inspect the unit and carry out the covered repair. The steps are straightforward:
- Stop using the unit and note the symptoms — no hot water, an error code, or a leak.
- File your claim online through the member portal or by phone, available 24/7, at Empire Home Protect’s claim page.
- Pay the flat service fee for the visit.
- Meet the assigned independent technician and share any descaling or maintenance records.
- Approve the covered repair or replacement once the diagnosis is confirmed.
Is Tankless Water Heater Coverage Worth It?
Tankless coverage is worth it when a plan’s yearly cost is less than the risk-adjusted cost of a major repair. For most homeowners with a tankless unit past its manufacturer warranty, the answer is yes. A heat exchanger or control board failure alone can run $500 to $1,500, so one covered claim usually offsets a full year of plan fees plus the service fee.
The alternative is paying the full repair out of pocket or draining an emergency fund. To see how whole-home plans compare on price and coverage, read our 2026 home warranty rankings.
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Frequently Asked Questions
Does a home warranty cover a tankless water heater that stops making hot water?
Yes, if the loss of hot water comes from a covered mechanical failure such as a bad igniter, flow sensor, or control board that failed from normal wear. If the unit stopped working because of mineral scale from skipped descaling or a pre-existing problem, the claim is usually denied.
Will a home warranty repair or replace a tankless water heater?
A plan repairs the unit first whenever a covered part can be fixed. Replacement is provided only when the tankless water heater cannot be repaired, and it is subject to your plan’s dollar limits for water heaters. You pay the service fee either way, not the full cost.
Does a home warranty cover tankless water heater installation?
No. New installation, upgrading from a tank to a tankless unit, and any code or permit upgrades required to pass inspection are excluded. A home warranty covers the repair or replacement of a unit that was already installed and working, not the cost of putting one in.
How long is the waiting period before tankless coverage starts?
Most home warranty plans begin coverage about 30 days after the plan start date. A failure reported during that waiting period is generally not covered, so it is best to enroll before an aging unit shows signs of trouble.
Does skipping annual descaling void tankless coverage?
Failures traced directly to mineral scale from missed descaling are treated as a maintenance issue and denied. The unit itself stays covered for other wear-and-tear failures. Keeping receipts from annual descaling protects your claim if a covered part later fails.
Is a tankless water heater covered under appliance or systems coverage?
A tankless water heater is a home system, so it falls under the systems side of a plan, not appliance coverage. Whole-home plans that bundle systems and appliances include it automatically once the waiting period ends.
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