
Tankless Water Heater Repair in Boerne, TX
Need tankless water heater repair in Boerne, TX today? Ignition faults, flow sensors, scale and leaks are what we fix, on Rinnai, Navien, Noritz, Rheem, Takagi and other makes.
- Error history read first
- Written quote before work
- Descaling through service valves
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 Boerne Homes
Most Boerne homes are brick houses where the tankless sits in the garage or on an outside wall. The February 2021 freeze showed how fast exposed lines can split here.
What we run into in Boerne
- 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.
About 19,509 people live in Boerne, across all 2 ZIP codes, and all of it is on our route: 78006, 78015.
Call (380) 273-8196Tankless Problems We Fix Around Boerne
These are the faults behind most calls for tankless water heater repair in Boerne, TX. The display usually points at one of them.

Code 11, E003 or 111
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
Venting codes mean the unit can't breathe: a blocked termination, a nest, snow or a vent run that's too long.
Shuts off mid-shower
Flow drops below what the unit needs to keep firing: a clogged filter, aerator or shower cartridge, or a sensor misreading.
Not as hot as it used to be
Scale on the heat exchanger, a weak gas supply or a thermistor reading wrong.
LC code on a Rinnai
The unit is reporting scale buildup. It needs a descale, and soon.
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 Boerne
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 Boerne
Budget an estimated $150 to $800 for most tankless water heater repair in Boerne, TX. The figure moves with the part, the brand and access; a replacement exchanger is estimated at $1,000 to $2,500.
Diagnosis & code check
- Flow, filter and venting checked
- Vent terminations looked over
- Gas pressure measured under load
Repairs & descaling
- Unit run at full demand afterwards
- Flow sensor or thermistor swapped
- Igniter, flame rod or sensor replaced
Heat exchanger & major parts
- Combustion checked after the swap
- Fan motor or blower replaced
- Warranty part claimed where it applies
Need Tankless Water Heater Repair in Boerne, TX? Call Us Now
Cold showers rarely fix themselves. Most units are back to full heat after one part and one visit.
Boerne Homes by the Numbers
With electricity the main heating fuel in Boerne (about 78% of homes), many tankless units here are electric, and their faults are elements, breakers and sensors rather than burners. The housing is recent (median year built 2006), so many tankless units are still young and scale, installation details and water quality are likelier causes than worn-out parts. Boerne is about evenly split between owners (around 61%) and renters, so calls come from homeowners and from landlords and property managers alike.
Boerne covers about 12 square miles and holds roughly 19,509 residents, around 1,660 per square mile: spread out, with mostly detached homes on larger lots and longer runs between fixtures and the street. It is number 103 by population of the 322 Texas places on our service list.
Source: U.S. Census Bureau, American Community Survey 2019-2023 5-year estimates for Boerne, TX.
Where We Go in Boerne
About 19,509 people live in Boerne, across all 2 ZIP codes, and all of it is on our route: 78006, 78015.
- 78006
- 78015
Nearby Cities We Serve
Tankless Water Heater Repair in Boerne, TX: 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 Boerne, TX 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.
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.
Why does my tankless water heater go hot then cold?
A second or two of cold after the tap reopens is normal start-up. If the water swings while it runs, look at low flow, scale or the flow sensor.

Get Hot Water Back in Boerne
A short call to (380) 273-8196, with the model and whatever the display shows, is usually all it takes to book.