Water Heater Repair in Austin, TX

Hot Water Back, Without the Attic Surprise

Gas, electric and tankless water heater repair across Austin, Round Rock, Cedar Park and Buda, any hour. We diagnose first and quote before we touch a part.

Austin Water Heater Repair

Hard Water and Hot Attics Shorten Austin Water Heaters

Two things wear out water heaters faster in Austin than almost anywhere else. The first is the water. Austin’s supply comes from the Highland Lakes and it is hard; out in Dripping Springs, Driftwood and the other Hill Country communities on wells, it is often harder. Every gallon that runs through a tank leaves a little mineral behind, and in a few years that sediment is a crust on the bottom of the tank that makes gas burners rumble, electric elements burn out, and the whole unit take longer to recover. The second is where builders put the heater. In the slab neighborhoods of Round Rock, Pflugerville, Cedar Park, Leander and Kyle, the tank is usually in the attic, where summer temperatures cook the controls and a leak drains straight through the ceiling below.

In the older central neighborhoods, Hyde Park, Crestview, Tarrytown, the heater is more often in a garage, closet or utility room, which makes leaks easier to catch but means the units are frequently older and the venting was retrofitted. We have repaired all of these since 1999, and we carry the elements, thermocouples, gas valves and relief valves that fail here. Our water heater repair page explains what a repair involves; here is what it looks like in an Austin house.

  • Diagnose, then quote You see the cause and the written price, honored 72 hours, before any part is replaced.
  • Honest repair-or-replace If the tank is at the end of its life, we tell you, with both numbers side by side.
  • Licensed, bonded plumbers Trained, background-checked and licensed for gas and water work in Austin.
Radiant plumber in front of a service van before an Austin water heater repair

What Goes Wrong

Water Heater Problems Austin Homeowners Report

Some of these are a part; some are the tank telling you it is done. A diagnosis tells you which.

  • Hot water runs out halfway through a shower

    A failed lower element on an electric tank, a stuck dip tube, or a tank so full of sediment that half its capacity is gone. Common in hard-water Austin.

  • Rumbling or popping from the tank

    Water boiling under a layer of scale on the bottom of a gas tank. A flush helps early; after years of it the tank bottom is stressed.

  • A stain on the ceiling below the attic

    Attic heaters leak from the relief valve, a fitting or the tank itself. The drain pan under it only helps if its line is clear.

  • The pilot will not stay lit

    Usually a thermocouple or a gas valve on an older unit. In a tight closet it can also be a combustion air problem worth fixing for safety.

  • Rusty or smelly hot water

    A spent anode rod lets the tank itself corrode. Rotten-egg smell is bacteria reacting with the anode, which is fixable; rust-colored water is a warning.

  • A tankless unit flashing an error code

    Scale on the heat exchanger, a dirty inlet screen or a flow sensor. Tankless units in Austin need descaling more often than the manual suggests.

Repairs We Make

Water Heater Repairs Across the Austin Area

Tank and tankless, gas and electric, in attics, garages and closets from Georgetown to Buda.

Radiant technician standing in front of a branded van on an Austin water heater call
Water heater repair across the Austin area for gas, electric and tankless units.
  • Elements and thermostats Upper and lower elements and their thermostats on electric tanks, the most common electric failure in scale-heavy water.
  • Thermocouples, gas valves and burners Pilot and ignition problems on gas tanks, plus cleaning burners that are choked with dust from an attic or garage.
  • Relief valves and expansion tanks A dripping relief valve is often high pressure, not a bad valve. We test pressure and add or replace the expansion tank when that is the real cause.
  • Flushing and anode rod replacement Sediment out, a fresh anode in. The two maintenance items that add the most years to a tank in Austin water. See water heater maintenance.
  • Tankless descaling and repair Flushing the heat exchanger, cleaning filters and replacing sensors and igniters. More at Austin tankless water heaters.
  • Leaking fittings, pans and drain lines Supply connectors, drain valves and the attic pan and its drain line, so a small leak does not become a ceiling.

How a Repair Call Goes

From No Hot Water to a Working Heater

You know the cause and the cost before anything is replaced.

  1. Call any hour

    Tell us the symptom, the fuel type if you know it, and where the heater lives. If it is leaking, shut the cold supply valve on top of the tank.

  2. We test the whole unit

    Elements, thermostats, gas valve, venting, pressure, anode condition and the tank itself, not just the part that matches the symptom.

  3. Repair or replace, your call

    A written price for the repair and, if the tank is old or corroding, an honest replacement number beside it. Honored 72 hours, no hidden fees.

  4. Fix it, test it, clean up

    We bring the heater back to temperature, check for leaks and combustion safety, and back the work with the Home Comfort Guarantee.

No Hot Water in Austin?

Licensed plumbers on call 24/7, with the price agreed before the repair begins.

What Our Customers Say

Don't just take our word for it — hear from our satisfied customers

J Jeff Fazio
Jeff Fazio 3 years ago
★★★★★
I had Radiant Plumbing replace my tankless water heater, damaged in the Feb. 2021 snowmageddon storm with a new unit. The process was smooth and professional from start to finish. The plumber, James, was extremely knowledgeable and thoroughly explained my options to me. The cost and time to perform the installation were just as estimated. When he was done, James explained how to maintain the system, what service would be needed and how to perform it, and answered all of my engineering geek questions. It was a thoroughly positive experience. I have used several different plumbers in Austin over the past 15 yrs, but my search is over - I will not hesitate to call Radiant next time and would recommend them unreservedly.

8/9/23 Update: I have subsequently used Radiant for a toilet repair, faucet installation (Danny), and drain work (Ezekiel) and they have continued to impress with knowledgeable, friendly plumbers and quality work.
C Cathy McClaugherty
Cathy McClaugherty 5 years ago
★★★★★
We called Radiant Plumbing after we noticed a water leak in our kitchen. We were in a time crunch and they were able to schedule us quickly, before we left for vacation. They sent their representative, Preston Nichols, and he was excellent to deal with! He was on time, skillful, friendly, and very professional. It turned out to be a problem with our dishwasher but Preston was quick to diagnose it and set our minds at ease. While he was here, we mentioned that our one year-old water heater needed to be flushed. Preston was quick to take care of that, as well, saving us time and money in the process. Radiant charged us almost half the price another plumber quoted us for that service! While Radiant Plumbing isn’t our usual plumber, they gained a new customer. We won’t hesitate to call Radiant again in the future based on our VERY positive experience with them.
S Stefano Rosellini
Stefano Rosellini 6 years ago
★★★★★
Had 3 different systems installed by them approx. 3 years ago for a total of approx $20k. I was quite happy with the install until the year later when they came for a maintenance call and started finding deficiencies in their own install. they wanted extra money to address those deficiencies. Now I am in the process of selling my home and an inspector has found a few items that need to be addressed and they will not even look at the report unless I schedule a $139.00 service call. Very poor customer service.. This company does not stand by their work and would not recommend.

I am revising my review of this business from 1 to 5 stars. After my original review I was contacted by the company's service manager and he made sure that I was taken care off. I had a team of 3 technicians coming to my house to double check the system and make the necessary adjustments. I was very satisfied by their attention to details and professionalism.

Maintenance Membership

Join the Care Club

Home maintenance for $9.99 a month.

Care Club members get two HVAC tune-ups and a plumbing safety inspection every year, priority scheduling, no dispatch fees — ever — and 5% off every repair.

  • Priority scheduling
  • Seasonal HVAC tune-ups
  • Annual safety inspection
  • Exclusive member discounts
  • Free dispatch on repairs
  • No long-term contracts

Austin Water Heater Repair Questions

How often should a water heater be flushed in Austin’s hard water?

Once a year is the practical answer for most Austin-area homes, and more often is not unreasonable on well water in the Hill Country. Manufacturers often suggest a flush every year or two under average conditions, but Central Texas water is well above average in mineral content, and a tank that goes five years without a flush can carry inches of scale on the bottom. Flushing also gives us a chance to check the anode rod, which is the part that sacrifices itself so the tank does not rust. Care Club members get an annual plumbing inspection where we look at both. A water softener slows the buildup considerably; see Austin water softeners.

My water heater is in the attic. Is there anything I should be doing about that?

Yes, three things. Make sure there is a drain pan under it with a line that runs to the outside, and that the line is not clogged; a pan with a blocked drain is a bucket waiting to overflow. Find the cold supply shutoff valve on top of the tank and confirm it turns, so you can stop a leak from below without climbing up in a hurry. And consider a leak sensor or a float switch in the pan that shuts the water off automatically. Attic heaters in Round Rock, Cedar Park and Pflugerville homes are normal and safe, but when they fail they fail onto drywall, and a few minutes of preparation changes what that costs.

Why does the relief valve on my water heater keep dripping?

The temperature and pressure relief valve opens when the water inside the tank gets too hot or the pressure gets too high. If it drips regularly, the usual cause in Austin homes is not a bad valve but excess pressure: water expands as it heats, and in a house with a pressure-reducing valve or a backflow device there is nowhere for that expansion to go without an expansion tank. Some Austin-area neighborhoods also have high street pressure that needs regulating. Replacing the relief valve alone often means it drips again in a month. We test the static pressure, check or add an expansion tank, and replace the valve only if it has actually failed.

When does a water heater repair stop making sense?

When the tank itself is leaking, there is no repair; the steel has rusted through and it needs replacing. Short of that, the deciding factors are age and what has already failed. A tank in its first decade with a burned-out element or a bad thermocouple is worth fixing. A tank well past ten years, with rusty water and a second or third repair coming, is usually costing more to keep than to replace, especially in an attic where the next leak has consequences. We give you both numbers in writing and let you decide. Our Austin water heater replacement page covers what comes next, and financing is available, subject to credit approval.

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