
Tankless Water Heater Repair in Marietta, GA
Tankless water heater repair in Marietta, GA for units that flash a code, run lukewarm or quit halfway through a shower. Each suspect part is tested, then fixed at a price you agree first.
- Written quote before work
- Gas and electric units
- Rinnai, Navien, Noritz, Rheem, Takagi
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 Marietta Homes
Many Marietta homes are brick ranches where the tankless went onto an outside wall or into the garage. Occasional hard freezes and gas supply sizing cause most of our calls.
What we run into in Marietta
- Freeze damage. A hard freeze can split the pipes feeding a unit. Its built-in freeze protection only works while the unit still has power and gas.
- Retrofit installs. Retrofits are common in this housing stock. When a unit throws flame codes only while the furnace or dryer runs, the gas supply is the first suspect.
Marietta and its ZIP codes (30006, 30007, 30008, 30060, 30061, 30062, 30063, 30064, 30065, 30066, 30067, 30068, and 2 more) are all inside our service area.
Call (380) 273-8196Tankless Problems We Fix Around Marietta
When people phone about tankless water heater repair in Marietta, GA, it is nearly always one of these problems. Each has a short list of causes.

Code 11, E003 or 111
A unit that clicks without lighting has an ignition, gas or venting fault, and each is checked in turn.

Drip from the cabinet
Drips come from service valves, fittings, the relief valve, the condensate line or the heat exchanger itself.

Code 10 or E110
Venting codes mean the unit can't breathe: a blocked termination, a nest, snow or a vent run that's too long.
LC code on a Rinnai
The unit is reporting scale buildup. It needs a descale, and soon.
Display is blank
No power at the outlet, a blown fuse or a failed control board.
Noisy or whistling
Scale, a struggling fan or a gas regulator issue, each of which shows up on testing.
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 Marietta
Igniters, flame rods, sensors, fans, gas valves and boards are worth replacing on almost any unit. The hard call is a leaking or cracked heat exchanger on an older unit, because that part can approach the price of new.
Read the model and serial off the label and call (380) 273-8196. The age and the fault together usually settle repair versus replace on the phone.
Call (380) 273-8196Estimated Repair Costs in Marietta
Most tankless water heater repair in Marietta, GA lands between an estimated $150 and $800 for parts and labor. A heat exchanger is the outlier, estimated at $1,000 to $2,500.
Diagnosis & code check
- Stored error history read
- Vent terminations looked over
- Gas pressure measured under load
Repairs & descaling
- Heat exchanger descaled
- Isolation valves added for flushing
- Flow sensor or thermistor swapped
Heat exchanger & major parts
- Warranty part claimed where it applies
- Fan motor or blower replaced
- Control board or gas valve replaced
Need Tankless Water Heater Repair in Marietta, GA? Call Us Now
The sooner a fault is tested, the more likely it is a small part and not a big one.
Marietta Homes by the Numbers
Gas heats about 64% of homes in Marietta, so gas tankless units, with their vent runs and gas-line sizing, are the usual case on a call. The median home here dates from 1986, 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. Roughly 47% of homes are owner-occupied and 55% single-family, so calls come from both homeowners and landlords.
With about 61,773 residents on roughly 24 square miles (near 2,597 per square mile), Marietta is suburban in density, with a mix of detached homes and townhomes. Among the 224 Georgia places we cover, it ranks number 5 by population.
Source: U.S. Census Bureau, American Community Survey 2019-2023 5-year estimates for Marietta, GA.
Where We Go in Marietta
Marietta and its ZIP codes (30006, 30007, 30008, 30060, 30061, 30062, 30063, 30064, 30065, 30066, 30067, 30068, and 2 more) are all inside our service area.
- 30006
- 30007
- 30008
- 30060
- 30061
- 30062
- 30063
- 30064
- 30065
- 30066
- 30067
- 30068
- +2 more
Nearby Cities We Serve
Tankless Water Heater Repair in Marietta, GA: 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 Marietta, GA 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. Freeze repairs depend on what split, and are priced once the damage is seen.
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.
Can a tankless water heater be repaired?
Yes, in most cases. Igniters, flame rods, flow sensors, thermistors, fans, gas valves and boards are all replaceable, and scale can be descaled. A leaking heat exchanger on an old unit is the main exception.
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.

Schedule a Tankless Visit in Marietta
(380) 273-8196 reaches someone who works on tankless units every day. Describe the problem and pick a time.
Talk to a Tankless Technician in Marietta
Covering Marietta
30006, 30007, 30008, 30060, 30061, 30062, 30063, 30064, 30065, 30066, 30067, 30068, 30069, 30090, and the neighboring parts of Cobb County.
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