Tankless Water Heater Repair in Rochester NY You Can Count On

Same-day diagnostics for no-hot-water calls. Rinnai, Navien, Noritz, Rheem.

AmeriHeat repairs tankless water heaters across Rochester NY and the surrounding Monroe, Wayne, and Ontario County area. Error code diagnosis, scale buildup, ignition faults, no-hot-water calls. Rochester hard water accelerates most tankless failure modes. Justin or Colby answers the phone.

★ 5.0 on Google · 76 Reviews · BBB Accredited · Veteran Owned · Licensed and Insured · Authorized Heil Dealer

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24/7 Emergency Service Available

No heat in winter, no cool in a heat wave, busted lines. We answer the phone day or night, weekends included.

585 454 8422

5.0 ★

Google · 76 Reviews

Wayne

County, NY

Same Day

Typical Response

All

HP Types Installed

Rochester homeowners call us when their tankless water heater throws an error code or stops producing hot water.

AmeriHeat is not a franchise. We are a Rochester NY based, truck-based, owner operated HVAC company. Justin or Colby answers the phone. No call centers, no rotating techs, no salesmen booking your service call.

Most tankless repair calls in Rochester come down to two things: Rochester hard water accelerating scale buildup on the heat exchanger, and error codes that need proper diagnosis rather than a reset and hope. We carry common tankless parts on the truck. Same day service when available, next day at the latest.

We service every system type. Gas furnaces, oil furnaces, boilers, heat pumps, central AC, and ductless mini splits. You get the price before any work begins. No surprises. No upsells in the driveway.

"You talk to the owners. You get a straight price. You get it done right."

The AmeriHeat Promise

The Owners

Justin & Colby

Justin VanCassele and Colby Baker run AmeriHeat together. Colby is a veteran. Both owners are on jobs every week across Rochester and Monroe, Wayne and Ontario Counties.

Give them a call. They actually pick up.

5.0 Google Rating

76 Reviews

Typical Response Same-day when available

24/7 Emergency Service

What is wrong with your tankless water heater?

AmeriHeat handles tankless water heater repair across Rochester NY. Note your error code before calling. Same-day diagnostics when available.

Most Common

Error Code / No Hot Water

Error code on the display, no hot water, or reduced hot water capacity. Rochester hard water scale buildup on the heat exchanger is the most frequent cause. Note your exact error code before calling.

Ignition

Will Not Light / Ignition Fault

Ignition error codes indicate the unit is not establishing a flame. Can be igniter, flame sensor, gas pressure, or venting issue. We diagnose at the unit and give you the cost before any repair begins.

Rochester-Specific

Scale Buildup / Hard Water

Monroe County water runs 8 to 20 GPG. Scale accumulates on the heat exchanger and causes flow errors, efficiency loss, and false fault codes. Annual descaling prevents most of these calls.

Tankless water heater repair in Rochester NY: what breaks, what to check, and when hard water is the real problem.

AmeriHeat repairs tankless water heaters across Rochester NY and the surrounding Monroe, Wayne, and Ontario County area. Rinnai, Navien, Noritz, Rheem, and other major brands. Same-day diagnostics when available. Justin or Colby answers the phone at 585 454 8422.

What to check before calling for tankless water heater repair

Note your error code first. Modern tankless water heaters display error codes that tell us exactly what failed before we arrive. Write down the code on the display and have it ready when you call. Beyond that:

Check the gas supply. Confirm other gas appliances in the home are working. A gas outage or closed shut-off valve will cause a tankless unit to fail with a no-ignition code.
Check the water supply valves. The cold water inlet and hot water outlet valves on the unit must be fully open. A partially closed inlet valve causes low-flow errors.
Check the flow rate. Tankless units require minimum flow to activate. Very low flow from a single fixture (a slightly open tap) may not be enough to trigger the unit. Try a full-open tap to test.
Check the venting. Blocked intake or exhaust venting causes lockout codes. Rochester snow accumulation on exterior vent covers is a real winter issue. Check that exterior vent terminations are clear.
Reset the unit. Many error codes clear on reset. Power the unit off, wait 30 seconds, power back on. If the code returns, do not keep resetting. Call 585 454 8422.

Common tankless water heater repair calls in Rochester NY

The actual failure modes we find on tankless repair calls across Monroe, Wayne, and Ontario Counties:

Scale buildup on the heat exchanger: The most common tankless failure in Rochester. Monroe County water runs 8 to 20 grains per gallon. Scale accumulates on the heat exchanger cells rapidly without annual descaling. Scale causes reduced flow, error codes that appear to be flow sensor failures, overheating codes, and eventually heat exchanger damage. In Rochester, scale-related failures account for the majority of tankless repair calls on units that are not on annual maintenance. The repair involves descaling the heat exchanger. If scale damage is severe enough, the heat exchanger itself may need replacement.
Ignition failure: The unit attempts to start, cannot establish a flame, and locks out. Causes: failed igniter, failed flame sensor, gas pressure issue, or venting restriction. Each brand uses different error codes for ignition faults. Navien codes start with "E" (E010 is ignition failure), Rinnai uses LC codes for scale and 11 for ignition. Note your exact code.
Flow sensor failure: Tankless units use a flow sensor to detect incoming water and trigger heating. A failed flow sensor causes the unit to not activate even when water is flowing. Often caused by debris in the inlet filter screen, which is cleanable. A physically failed sensor requires replacement.
Freeze damage in Rochester winters: Tankless units have built-in freeze protection, but units in unconditioned spaces (garages, unheated crawlspaces) can freeze during extended Rochester cold snaps. Freeze damage to the heat exchanger or pipes requires professional repair. Units that lose power during a cold snap may not have freeze protection active.
Venting issues: Blocked or incorrectly installed venting causes the unit to shut off on high-temperature or combustion safety codes. Rochester-specific: snow can block exterior vent terminations in winter. Inspect the exterior vents before calling.
Cold water sandwich: A brief burst of cold water between hot water draws is a normal tankless characteristic, not a failure. The unit shuts off between uses and the residual water in the line cools before the next draw activates the heater. If this is bothering you, a recirculation pump solves it.

Tankless water heater not working in Rochester NY? Call 585 454 8422. AmeriHeat handles tankless repair across Rochester, Pittsford, Fairport, Webster, Penfield, Brighton, Victor, Farmington, Canandaigua, Macedon, Palmyra, and the wider Monroe, Wayne, and Ontario County area. Note your error code. Justin or Colby answers the phone.

Tankless water heater brands we repair in Rochester NY

We repair all major tankless water heater brands: Rinnai, Navien, Noritz, Rheem, and others. Each brand has a different error code system. Navien uses E-codes, Rinnai uses numeric codes, Noritz uses similar numeric codes, Rheem uses a combination. Note your exact code and brand model when you call. For annual descaling and maintenance see our tankless maintenance page. For new tankless installation see our installation page. Call 585 454 8422 or fill out the contact form and Justin or Colby will get back to you directly.

Tankless repair and all water heater services across Rochester NY.

Repair is one part of what AmeriHeat does for tankless water heater owners. Annual maintenance prevents most of the repair calls we get.

Water heater repair calls across Rochester NY.

We do not have tankless-specific repair photos yet. These photos show water heater and related service work across the Rochester area. Justin to add tankless repair photos when available.

Water Heater Repair

PRV Replacement, Henrietta NY

Real Henrietta water heater repair call: pressure relief valve found leaking. PRVs are a safety component on both tank and tankless systems. Replaced same visit. This is the type of water heater repair work AmeriHeat handles across Rochester.

Commercial Water Heater

Rochester Commercial Unit

Commercial water heater replacement in Rochester NY. AmeriHeat handles both residential tankless repair and commercial water heater work. Same owners, same standards. Justin to replace with tankless repair photo when available.

Commercial Installation

Rochester Commercial Install

Commercial water heater installation in Rochester NY. When repair cost approaches replacement cost on a tankless unit, we give you both numbers and let you decide. We install Rinnai, Navien, Noritz, and Rheem tankless systems.

How AmeriHeat works.

Five steps. No pressure. No surprises.

Call or book online

Call 585 454 8422 or fill out the form. Justin or Colby answers the phone.

We respond within same-day when available, next day at the latest

Same day service when available. Next day at the latest. 24/7 for true emergencies.

You get the price before we start

No surprises. You approve the cost in writing before any work begins.

We complete the work

Done right the first time with quality parts and clean workmanship.

We follow up

If something does not feel right after, call us. We stand behind every job.

Customer Reviews

5.0 on Google across 76 reviews.

Honest feedback from real Rochester area customers. Read every review on our Google profile.

5.0

Google Rating

Reviews

100%

5-Star Rate

Read Reviews on Google

Heat pump not working?

Call the owners. Get a straight answer.

Justin or Colby answers the phone. Same-day heat pump diagnosis when available. Call 585 454 8422.

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585 454 8422

Tankless water heater repair FAQ for Rochester NY homeowners.

Direct answers to what Rochester homeowners ask when their tankless water heater stops working.

Does AmeriHeat repair tankless water heaters in Rochester NY?+

Yes. AmeriHeat repairs tankless water heaters across Rochester NY and Monroe, Wayne, and Ontario Counties. We service Rinnai, Navien, Noritz, Rheem, and other major brands. Same-day diagnostics when available. Note your error code before calling. Call 585 454 8422. Justin or Colby answers the phone.

My tankless water heater shows an error code. What should I do?+

Write down the exact error code and your unit's brand and model. Then call 585 454 8422. Error codes on Navien units start with "E" (E010 is ignition failure, E003 is ignition failure after retries). Rinnai uses numeric codes (11 for ignition, LC for scale). Noritz uses similar codes. The error code tells us what parts to bring and narrows diagnosis before we arrive.

Why does Rochester hard water cause so many tankless problems?+

Monroe County water runs 8 to 20 grains per gallon, classified as hard to very hard. When a tankless unit heats water, minerals precipitate and deposit on the heat exchanger cells. Without annual descaling, scale accumulates within 2 to 3 years in Rochester water conditions. Scale causes reduced flow rates, false flow sensor error codes, efficiency loss, and eventually overheating damage to the heat exchanger. Annual descaling prevents most of the tankless repair calls we get in Rochester.

My tankless produces hot water for a while then goes cold. What is wrong?+

If it goes cold after several minutes of use, the heat exchanger may be scaling up and the unit is triggering a thermal protection shutoff. Call 585 454 8422 and describe the pattern: how long before it goes cold and whether an error code appears. If there is a brief cold burst between draws and then it goes hot again, that is the cold water sandwich effect and is normal behavior for tankless units, not a failure.

Do you repair Rinnai and Navien tankless water heaters in Rochester NY?+

Yes. Rinnai and Navien are the two most common residential tankless brands in the Rochester area. We service both, along with Noritz, Rheem, and other brands. Note your error code and call 585 454 8422.

Is AmeriHeat owner operated?+

Yes. Justin VanCassele and Colby Baker own and run AmeriHeat. When you call 585 454 8422, Justin or Colby answers directly. Both personally handle tankless water heater repair calls across Rochester and the surrounding area.

Get a free tankless water heater repair estimate in Rochester NY.

Tell us what is going on with your ductless mini-split. Note any error code if you have one. Justin or Colby will get back to you with a straight diagnosis approach. No sales pressure. No call center. Justin or Colby answers the phone.

Call

585 454 8422 7am to 7pm, 7 days · 24/7 emergency · Justin or Colby answers

Email Justin

Jvancassele@ameriheat.co

Email Colby

Cbaker@ameriheat.co

General Inquiries

ameriheatllc@gmail.com

Mailing Address

60 Hartsdale Rd, Rochester NY 14622

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