​Our Water Heater Services

At OnCall Plumbing, we provide comprehensive water heater services to help homeowners maintain reliable hot water.

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Our services include:

• Water Heater Repair: Diagnose and repair problems such as inconsistent temperatures, insufficient hot water, leaks, and malfunctioning components.

• Water Heater Installation: Professional installation of appropriately sized tank and tankless water heaters.

• Water Heater Replacement: Replace aging or failing equipment with a system suited to your household's needs.

• Water Heater Maintenance: Routine inspections, tank flushing, and manufacturer-recommended maintenance.

• Tankless Water Heater Service: Rinnai tankless flushing, descaling, diagnostics, and repairs.

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We evaluate your equipment and explain our recommendations before proceeding with repairs or replacement.

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Why Regular Water Heater Maintenance Matters

Your water heater works throughout the year, but it often receives little attention until something goes wrong.

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Over time, sediment can accumulate inside traditional tank water heaters. Hard water minerals may also form scale on heating surfaces, including the heat exchanger inside a tankless system.

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This buildup can affect performance and efficiency.

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Routine water heater maintenance provides an opportunity to:

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• Evaluate your water heater's overall condition.

• Address sediment and mineral buildup.

• Identify visible leaks or deteriorating connections.

• Review operating temperatures and system performance.

• Determine whether repairs or additional maintenance are recommended.

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Although maintenance cannot prevent every breakdown, it can help you make informed decisions and address developing concerns.

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Warning Signs Your Water Heater May Be Failing: What Central Texas Homeowners Should Watch For >

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Traditional Tank Water Heater Maintenance & Repair

OnCall Plumbing services gas and electric tank water heaters throughout Greater Austin.

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Depending on your water heater's model, condition, and service history, a maintenance visit may include:

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• Flushing the tank to help remove accumulated sediment.

• Checking for visible leaks, corrosion, and damaged connections.

• Evaluating the temperature and pressure relief valve and discharge piping.

• Assessing whether the anode rod needs inspection or replacement.

• Reviewing water temperature settings and operation.

• Checking applicable venting, drain pan, and expansion-control components.

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Our plumbers explain the recommended maintenance and discuss any necessary repairs before additional work begins.

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Rinnai Tankless Water Heater Maintenance & Repair

Tankless water heaters provide hot water on demand, but they still require routine maintenance.

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Minerals in Central Texas water can accumulate inside a tankless system's heat exchanger, potentially affecting performance over time.

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As a Rinnai PRO Service Contractor, OnCall Plumbing provides tankless water heater maintenance and diagnostic services.

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Depending on the model and service requested, our work may include:

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• Descaling the heat exchanger.

• Cleaning the water inlet screen.

• Checking accessible plumbing connections.

• Reviewing error codes and system operation.

• Diagnosing inconsistent water temperatures or unexpected shutdowns.

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A routine tankless flush is different from a complete diagnostic service. If your unit displays an error code, stops producing hot water, or operates inconsistently, we'll investigate the problem and explain the recommended solution.

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Learn more about our Tankless Water Heater Services.

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How Often Should You Schedule Water Heater Maintenance?

For many homeowners, an annual professional maintenance visit is a reasonable starting point.

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However, maintenance requirements depend on your water heater's manufacturer, model, water quality, and household usage.

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Homes with particularly hard water or heavy hot water demand may need more frequent attention.

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If you're unsure when your water heater was last serviced, OnCall Plumbing can evaluate its condition and recommend an appropriate maintenance schedule.

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Signs You Need Water Heater Repair

Water heater problems don't always mean you need a complete replacement. Many issues can be diagnosed and repaired.

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Contact OnCall Plumbing if you notice:

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• No hot water: Your system stops heating water or produces insufficient hot water.

• Inconsistent temperatures: Water suddenly becomes too hot or too cold.

• Water around the heater: Leaks may develop around connections, valves, or the tank.

• Unusual noises: Popping or rumbling sounds may be associated with sediment buildup.

• Tankless error codes: Repeated shutdowns or warning codes may indicate a system issue.

• Reduced hot water supply: Your household runs out of hot water sooner than expected.

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Our plumbers diagnose the issue before recommending repairs or replacement, helping you understand your options.

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Water Heater Installation & Replacement in Austin, TX

If your water heater is approaching the end of its useful life, requires frequent repairs, or no longer meets your household's needs, replacement may be the best option.

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OnCall Plumbing installs A. O. Smith tank water heaters and Rinnai tankless water heater systems.

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Before recommending equipment, we evaluate:

• Household hot water demand.

• Available installation space.

• Existing water and energy connections.

• Venting and drainage requirements.

• Equipment sizing and installation considerations.

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We provide a clear estimate explaining the proposed equipment and scope of work so you know what to expect.

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Whether you're replacing a traditional tank water heater or upgrading to a tankless system, our team can help you choose a practical solution.

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Can a Water Softener Help Your Water Heater?

Hard water contains calcium and magnesium, which can contribute to mineral deposits inside water heaters and other water-using equipment.

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A properly sized water softener reduces these hardness minerals, helping limit future scale buildup.

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OnCall Plumbing also installs Novo water softening and carbon filtration systems for Central Texas homeowners.

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While a water softener can help reduce new mineral deposits, it does not replace routine water heater maintenance.

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Learn more about our Water Softener Installation Services.

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Frequently Asked Questions About Water Heaters

How do I know whether to repair or replace my water heater?

The decision depends on your water heater's age, condition, repair history, and the nature of the problem. Our plumbers evaluate your equipment and explain whether repair or replacement makes more sense.

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Do tankless water heaters need maintenance?

Yes. Tankless systems require manufacturer-recommended maintenance, which may include descaling the heat exchanger and cleaning filters or screens.

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How often should a tank water heater be flushed?

Maintenance frequency depends on the manufacturer's recommendations, local water conditions, and usage. Annual professional maintenance is a useful starting point for many households.

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Does OnCall Plumbing install A. O. Smith water heaters?

Yes. OnCall Plumbing installs A. O. Smith tank water heaters and is an A. O. Smith Preferred Service Contractor.

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Does OnCall Plumbing service Rinnai tankless water heaters?

Yes. As a Rinnai PRO Service Contractor, we provide Rinnai tankless water heater maintenance, diagnostics, and repair services.

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Schedule Water Heater Service With OnCall Plumbing

Whether you need emergency water heater repair, routine maintenance, or a complete replacement, OnCall Plumbing is ready to help.

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We proudly serve homeowners throughout Austin, Liberty Hill, Georgetown, Leander, Cedar Park, and surrounding Central Texas communities.

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Our local, family-owned plumbing company is committed to honest recommendations, clear communication, and treating your home with respect.

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Call (512) 288-1564 or book online to schedule water heater installation, repair, or maintenance.