
Tankless Water Heater Repair in Lake Mary, FL
Need tankless water heater repair in Lake Mary, FL today? Ignition faults, flow sensors, scale and leaks are what we fix, on Rinnai, Navien, Noritz, Rheem, Takagi and other makes.
- Descaling through service valves
- Rinnai, Navien, Noritz, Rheem, Takagi
- Error history read first
Fault found first
The code, the stored history and each suspect part are tested before anything is ordered.
Price agreed in writing
Parts and labor go on a written quote, and nothing starts until you approve it.
Licensed local techs
Repairs by licensed technicians who work in your part of town.
Tankless units only
One specialty: gas and electric tankless heaters that stopped doing their job.

Tankless Units in Lake Mary Homes
Many Lake Mary homes are concrete-block houses, and the tankless usually sits in the garage. Much of Florida draws hard water from the aquifer, so scale is a steady issue.
What we run into in Lake Mary
- Hard water. With water this hard, a unit that has never been flushed is usually running hot inside and cold at the tap. Descaling is often half of the cure.
- Garage installs. Here the unit typically lives in the garage, so the inlet filter and the service valves are easy to get at when it needs attention.
From one side of Lake Mary to the other (32746, 32795), plus nearby parts of Seminole County.
Call (380) 273-8196Tankless Problems We Fix Around Lake Mary
Most requests for tankless water heater repair in Lake Mary, FL start with one of the symptoms below, and most end with a single part or a descale.

Unit won't light
No ignition usually means gas pressure, a worn igniter, a dirty flame rod or a blocked vent. Each is tested.

Water under the unit
Drips come from service valves, fittings, the relief valve, the condensate line or the heat exchanger itself.

Code 10 or E110
An air or exhaust code stops the burner for safety. The intake and exhaust are cleared and checked.
Cold at one tap only
Usually a mixing valve or a cold-water crossover at that fixture, not the heater.
LC code on a Rinnai
The unit is reporting scale buildup. It needs a descale, and soon.
Frozen after a cold night
Lines feeding the unit froze, or freeze protection lost power.
Can't tell which one you have? Read us the display and describe the water, and the likely fault comes back on the call.

Fix It or Retire It? Deciding in Lake Mary
Most tankless faults are repairs, plain and simple. Replacement only makes sense when the heat exchanger has failed out of warranty or an electric unit is near the end of its shorter working life.
Tell us the brand, roughly how old the unit is and what it is doing when you call (380) 273-8196. If a repair is a poor spend, you will be told so.
Call (380) 273-8196Estimated Repair Costs in Lake Mary
A typical bill for tankless water heater repair in Lake Mary, FL is estimated at $150 to $800. These are estimates, not quotes, and an exchanger replacement sits higher at an estimated $1,000 to $2,500.
Diagnosis & code check
- Model and serial noted for warranty
- Stored error history read
- Vent terminations looked over
Repairs & descaling
- Flow sensor or thermistor swapped
- Igniter, flame rod or sensor replaced
- Unit run at full demand afterwards
Heat exchanger & major parts
- Honest word if a new unit is the better spend
- Warranty part claimed where it applies
- Combustion checked after the swap
Need Tankless Water Heater Repair in Lake Mary, FL? Call Now
A code that keeps returning after a reset is the unit asking for a proper look.
Lake Mary Homes by the Numbers
Electricity heats about 96% of homes in Lake Mary, so electric tankless units, with their heavy-amp circuits and element faults, are as common here as gas ones. The median home here dates from 1997, so tankless units are a mix of original-era installs and newer replacements, and an older unit that has never been descaled is a frequent find. Owners live in about 66% of Lake Mary homes (single-family about 67%), so the person who calls is usually the person who decides.
With about 16,724 residents on roughly 9.1 square miles (near 1,842 per square mile), Lake Mary is spread out, with mostly detached homes on larger lots and longer runs between fixtures and the street. It is number 124 by population of the 308 Florida places on our service list.
Source: U.S. Census Bureau, American Community Survey 2019-2023 5-year estimates for Lake Mary, FL.
Where We Go in Lake Mary
From one side of Lake Mary to the other (32746, 32795), plus nearby parts of Seminole County.
- 32746
- 32795
Nearby Cities We Serve
Tankless Water Heater Repair in Lake Mary, FL: FAQs

Question not covered here?
Call and ask. Someone who repairs tankless units answers, and the phone quote is free.
Call (380) 273-8196How much does tankless water heater repair in Lake Mary, FL cost?
Most repairs cost an estimated $150 to $800, depending on the part. Descaling alone is estimated at $150 to $350, and a heat exchanger at $1,000 to $2,500. On hard water, a descale often goes with the repair and sits on the same written quote.
What is the most common problem with tankless water heaters?
Scale in the heat exchanger, followed by ignition faults and flow sensor or filter problems. All three usually show up as a code or as water that won't stay hot.
How often should a tankless water heater be flushed?
Most makers call for a flush every year, and every six months on very hard water. On very soft water the gap can be longer, but skipping it for years invites scale faults.
How long does a tankless water heater last?
A gas unit that is flushed regularly commonly lasts 20 years or longer. Electric tankless models usually give 7 to 10.

Schedule a Tankless Visit in Lake Mary
Call (380) 273-8196. Nothing is repaired until you have approved the written quote.
Talk to a Tankless Technician in Lake Mary
Covering Lake Mary
32746, 32795, and the neighboring parts of Seminole County.
More Florida service areas