Water Heater Repair & Installation – Hot Water Restored Fast
No hot water is never just an inconvenience – it disrupts your entire household. Olde Town Plumbing's San Antonio technicians diagnose, repair, and install all water heater types.
San Antonio Water Heater Experts
Full-Service Water Heater Solutions for San Antonio Homes
Whether your water heater is making strange noises, producing rusty water, taking too long to recover, or has stopped working entirely — Olde Town Plumbing has the expertise to diagnose the problem and present you with the most cost-effective solution.
Our licensed San Antonio plumbers service and install all major water heater brands and types — traditional storage tank heaters, energy-efficient tankless systems, and hybrid heat pump water heaters. We carry the most common parts and units on our trucks, so many repairs and replacements happen in a single visit.
San Antonio’s hard water is notoriously hard on water heaters. Mineral scale buildup dramatically reduces efficiency and shortens unit lifespan. We factor this into every recommendation — including whether a water softener or whole-house filter would help protect your new investment (see our Water Quality Services).
Warning Signs
Signs Your Water Heater Needs Attention
Don’t wait for a complete failure. These warning signs often signal an issue that’s cheaper to fix now than after a full breakdown emergency happens— or a leak that damages your home.
No hot water or water that’s lukewarm at best
Rusty or discolored water from hot taps
Rotten egg or sulfur smell from hot water
Rumbling, popping, or banging noises during heating
Visible rust, corrosion, or moisture around the unit
Water pooling around the base of the heater
Hot water running out much faster than it used to
Consistently rising energy bills without increased usage
Unit is more than 10–12 years old (tank) or 15–20 years old (tankless)
Pilot light that won’t stay lit (gas water heaters)
Water Heater Options
Choosing the Right Water Heater for Your San Antonio Home
Every home has different hot water needs, space constraints, and energy priorities. We’ll help you compare your options and select the system that delivers the best long-term value for your situation.
Traditional Tank Water Heater
The most common water heater type in San Antonio. A storage tank unit holds 30–80 gallons of preheated water, providing a ready supply at a predictable cost.
Advantages
- Lower upfront cost
- Simple to repair and maintain
- Available in gas and electric
- Widely compatible with existing plumbing
Considerations
- Can run out of hot water during high demand
- Standby heat loss reduces efficiency
- Typical lifespan 8–12 years in San Antonio (We recommend a water softener to address this hard water impact.)
MOST POPULAR UPGRADE
Tankless (On-Demand)
Tankless water heaters heat water directly as it flows through the unit — no storage tank, no standby heat loss. They’re increasingly popular for San Antonio homes seeking energy efficiency and endless hot water.
Advantages
- Unlimited hot water on demand
- Up to 34% more energy-efficient than tank units
- Lifespan of 20+ years with proper maintenance
- Space-saving wall-mount design
- Eligible for energy efficiency tax credits
Considerations
- Higher upfront installation cost
- May require gas line or electrical upgrades
- Annual descaling recommended in San Antonio (Address hard water issues with a softener installation)
Professional & Prompt Plumbing Service
Repair Services
Water Heater Repairs We Perform in San Antonio
Not every water heater problem requires a full replacement. Our licensed plumbers diagnose the root cause and recommend repair when it’s the smart, cost-effective choice.
Thermostat Replacement
A faulty thermostat is one of the most common causes of water that's too hot, too cold, or inconsistent. This is typically a straightforward, affordable repair.
Heating Element Replacement
Electric water heaters use one or two heating elements that wear out over time. Replacing a failed element restores full heating capacity without replacing the unit.
Anode Rod Replacement
The sacrificial anode rod protects your tank from corrosion. Replacing it every 3–5 years — especially important with San Antonio's hard water — can double your tank's lifespan.
Pressure Relief Valve Service
The T&P (temperature and pressure) relief valve is a critical safety component. A faulty valve can cause dangerous pressure buildup. We test and replace these on every water heater service call.
Pilot Light & Igniter Repair
Gas water heater won't stay lit? We diagnose and repair thermocouple failures, gas valve issues, and igniter problems — restoring reliable operation for gas-fired units.
Scale Flush & Descaling
San Antonio's hard water deposits scale inside tank heaters and tankless units, reducing efficiency and output. Annual flushing restores performance and extends equipment life.
How It Works
Our Water Heater Service Process
1
Call or Book Online
Reach us by phone for immediate assistance or book online for scheduled service. Same-day appointments are often available.
2
Diagnosis & Assessment
Our plumber thoroughly inspects your water heater, tests components, and identifies the root cause of the problem.
3
Clear Recommendation
We give you a written quote and honest advice: repair vs. replacement, and which system best fits your needs and budget.
4
Expert Repair or Install
With your approval, we complete the repair or installation — properly permitted, to code, and tested before we leave.
Brands We Service
All Major Water Heater Brands
Our San Antonio plumbers are trained to service and install water heaters from every major manufacturer. If you have a brand not listed below, give us a call — we almost certainly work on it.
A.O. Smith
Bradford White
Rinnai
Navien
Bosch
Takagi
Whirlpool
Kenmore
Ecosmart
GE Water Heaters
State Water Heaters
No Hot Water in San Antonio? We Can Help Today.
Call now for same-day water heater repair or installation throughout the San Antonio area.
Common Questions
Water Heater FAQ — San Antonio
How long do water heaters last in San Antonio?
San Antonio’s hard water is tough on water heaters. Traditional tank water heaters typically last 8–12 years in our area — compared to the 10–15 year national average. Tankless water heaters tend to last longer (15–20+ years) but require annual descaling to perform well in hard water conditions. Regular maintenance and a water softener can significantly extend the life of any water heater.
Should I repair or replace my water heater?
A good rule of thumb is the “Rule of 5,000”: multiply the unit’s age by the estimated repair cost. If the result exceeds $5,000, replacement is usually the better investment. For example, a 10-year-old unit with a $600 repair cost gives a score of 6,000 — suggesting replacement is worth considering. We always give you an honest recommendation during our diagnostic visit.
Is a tankless water heater worth it in San Antonio?
For most San Antonio homeowners, yes — especially for families with high hot water demand. Tankless units deliver significant energy savings (typically 24–34% more efficient than tank models), an essentially unlimited supply of hot water, and a longer lifespan. The higher upfront cost is typically recovered over 5–8 years in energy savings. Note that annual descaling is essential in San Antonio given the hard water.
Do you pull permits for water heater installations in San Antonio?
Yes. The City of San Antonio requires permits for water heater replacements and new installations. Unpermitted water heater work can create issues when selling your home and may affect homeowner’s insurance coverage. Olde Town Plumbing handles all required permits as part of every installation — we do things by the book.
Can you install a tankless water heater where my tank unit is now?
In most cases, yes. Tankless units are significantly smaller than tank models, so space is rarely a concern. However, switching from a tank to a tankless unit may require upgrades to your gas line size or electrical service, depending on the unit and your home’s current setup. We assess this during the initial consultation and include any necessary upgrades in our quote.
Why Choose Us
What Sets Olde Town Plumbing Apart in San Antonio
State-Licensed Master Plumbers
Every job is performed or supervised by a Texas-licensed master plumber, ensuring code-compliant work that protects your home's value and your family's safety.
Upfront, Flat-Rate Pricing
We quote the price before we start. No surprise invoices, no hidden fees. You approve the cost, then we get to work.
Fast Response Times
Same day appointments are usually available and our technicians can reach most San Antonio neighborhoods in under an hour for emergency calls. We respect your time.
Satisfaction Guaranteed
We stand behind every repair and installation with a workmanship warranty. If something isn't right, we come back and make it right.
Family-Friendly Service
All our technicians are background-checked and drug-tested. We treat your home with the same respect we'd want in our own.
Locally Based
We're your neighbors — not a national franchise. Our investment is in the San Antonio community, and that shows in how we treat every customer.
Service Area
Serving San Antonio & Surrounding Communities
Our San Antonio plumbers travel throughout Bexar County, Kendall County and nearby communities. If you don’t see your neighborhood below, give us a call — chances are we serve your area.
Far North San Antonio
Northwest San Antonio
Northeast San Antonio