Water Heater Replacement in San Marcos, TX
Trusted Hot Water Heater Installation Since 1996
Whether your hot water isn't working at all, or is simply not staying hot long enough for you to shower, you can count on the team at Reliable Air for expert water heater repair in San Marcos, TX. We will always try to repair your water heater rather than replace it, but sometimes it makes more financial sense to get a new water heater instead of repair your old one.
Signs You Need a Water Heater Replacement
- Water leakage around tank: Water leakage isn't always a guaranteed sign you'll need a replacement. But it's a major red flag if it comes from a crack in the tank. If you do see a crack, contact Reliable Air right away.
- Uneven temperatures or no hot water: Is your water heater notoriously unreliable? Maybe it's only working for a few minutes at a time, or worse, not at all! There's no guarantee you'll need a replacement here, but when combined with other signs, you'll definitely want to consider a new system.
- Constant repairs: If you've called plumbers to your home multiple times to fix your tank water heater, chances are deeper issues aren't being addressed. Constant repairs indicate that the system is on its last leg and needs replacement. This is especially true if the system is 15+ years old.
- Increased usage limiting hot water: If you've had a few additions to your family but haven't replaced your water heater for a while, it may be time for an upgrade. We can help size your new water heater so you won't have to worry about hot water running out!
Call (512) 580-8837 or fill out our online contact form for same-day water heater repair or replacement in San Marcos, TX!

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"Technician JW called ahead of arrival and was on time."
JW quickly ID the problem and explained what was happening and what needed to be done. He was personable and completed the job w/o delay.- Travis H. -
"I will use you guys again in the near future!"
He knew exactly what needed to be fixed and he was right on it. I thank you all for the quick, fast and in a hurry respond you did for my family and I. Especially during this freezing weather.- Anna A. -
"I would recommend them to anyone."
Knowing their quality of work, when I needed work on my own home I knew who to call.- James B. -
"Wonderful customer service on top of always being available day and night."
Shout out Cheryl and Juan for the great experience! The entire team is on top of it!- Bryn L. -
"3 years of frustration cured in under an hour!"
They were able to diagnose the root cause and fix an issue that had been a nagging problem ever since the HVAC was installed by another company.- Chance S. -
"I am super grateful."
Andy was extremely polite, helpful, and transparent. Reliable Air was able to accommodate my crazy work schedule to service my a/c unit.- Jennifer S. -
"When Edgar arrived he was polite and courteous. He explained what he was going to complete the diagnostics first."
He then explained what needed to be done and made sure I understood. It was very appreciated that he gave me time to decide on my repair because it was going to cost a bit of money.- Esther T. -
"Their technicians are amazing and wonderful staff."
Our system stopped cooling and reliable was quick to respond. They easily diagnosed the issue and took care of it immediately. Our safe T sensor kept tripping they cleaned the drain and fixed the sensor.- Erik G.
Why Choose Reliable Air?
- Reliable people—Our water heater replacement specialists are licensed, insured, and trained to install most tank water heater models.
- Reliable financing— High credit score? Low credit score? We can help people with either!
- Reliable relationships—Many of our employees stay for 10+ years. So you'll always hear a familiar voice on the phone or see a familiar face at your door.

How Our Process Works
- Schedule Your Repair - We make it easy for you to schedule your duct repair service. Just give us a ring at (512) 580-8837 or use our online appointment scheduler. We offer 2-hour scheduling windows. We will send you a confirmation, so you’ll know when we’re arriving.
- Notify You Before We Arrive - Your service technician will call you when they’re 30 minutes out. This way, you won’t have to wait around, wondering when they’ll get there.
- Give You a Price - Prior to your service, your technician will inspect the areas that need repairing. They’ll also provide you with upfront and transparent pricing, so you never have to worry about receiving a surprise bill.
- Complete Our Work - Once you’ve signed off on the quote, your technician will get straight to work. They’ll also let you know how long the service will take, so you can have peace of mind about how long they’ll be working in your home.
- Make Sure You're Happy - No matter the job, each member of our team values efficiency and a job done right. To ensure that we lived up to your expectations, we’ll request feedback on our performance after the job is complete. We have a 100% satisfaction guarantee— and we mean it.

Why Choose Us?
As times get tough, other companies cut corners. But we decided to stay reliable for over 29 years. Call us and you'll get:
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Many of our employees stay for 10+ years. So you'll always hear a familiar voice on the phone or see a familiar face at your door.
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With same-day service and 2-hour scheduling windows, you'll get service at a time that's convenient for you.
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Since we constantly train our employees, you can be 100% confident that your job will be done right—the first time.