Tankless Water Heater Repair

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Tankless Water Heater Repair in Orange County

Certified Plumbers Who Fix Electric & Gas Tankless Water Heaters

If you are noticing fluctuating water temperatures in your water heater or a lack of hot water, you need to have your tankless water heater inspected by a skilled Orange County plumber. Our experts at CastleWorks specialize in water heater repair for both traditional tank models and tankless models.

The most common problem we encounter when showing up for a tankless water heater repair call is mineral buildup.

How to Avoid Sediment Buildup In Your Tankless Water Heater Unit

If you have hard water issues in your home, a water softener is your first line of defense. You should also be replacing your water line filter attached to your unit at least yearly to keep sediment out. One of our plumbing professionals can help you with that if needed. One last method that may be needed (depending on the state of your existing water heater) would be a flush the whole system and descale it in the process. But unlike conventional units, which need a flush every 6-12 months, a tankless water heater does not need to be done very often in most cases.

No one likes an expensive repair bill or to be left without hot water. Adequate maintenance may help you avoid unnecessary service calls. We recommend scheduling regular tune-ups for your tankless water heater. As a result, you will catch small problems early on and avoid larger plumbing emergencies. Additionally, you may reduce sediment buildup which will inhibit your water heater’s performance. Don’t hesitate to call CastleWorks with any maintenance concerns for more information.

More Problems We Enounter When Repairing Tankless Heaters in Orange County

Some of the symptoms listed out below are things we commonly encounter when a tankless heater needs to be repaired.

  • Lack of Hot Water
  • Fluctuation of Hot to Cold and Back to Hot (Cold Water Sandwich)
  • Poor Water Pressure
  • Scalding Water
  • Insufficient Hot Water
  • Loose Water Line Connections
  • Sizing Issues

If your tankless water heater is serviced by a seasoned professional yearly, you may avoid these issues and keep your system running at its ideal performance.

Why People Prefer Tankless Heaters Over Conventional Water Heaters

First off, tankless water heaters take up a lot less space—up to three feet less in diameter—than their bulkier traditional counterparts. If you’re tight in your hot water closet at home, picture getting up to 9 square feet of extra space. Feels good, doesn’t it? Then, there’s the fact that tankless water heaters also require less upkeep, and they need to be repaired less often—though when you do need tankless water heater repaired, we’re just a call away.

They’re also pretty cost-effective, since they waste less energy heating up a tank of water. And speaking of energy, gas tankless water heaters have been estimated to save the average family about $100/year on its electric bill. Makes sense to us!

Call CastleWorks in Orange County for Tankless Heater Repair Today

When you call on our Orange County tankless water heater repair experts, you can trust that we will provide you with the highest quality solutions. We are known for our quick response times and excellent customer service, and we will work tirelessly to get your tankless water heater back up and running in no time.

Call us today at (714) 253-7078.

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Excellent1729 reviews
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Girard Miller profile picture
Girard Miller
9 September 2026
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We needed to replace our large 100 gal water heater (4.5 Ba house) and called Castleeworks when some slight leakage was visible in the drain pan. Great same-day service by Salvador Vidales, who provided the price estimate, consulted with us on options, and got us an additional discount because we were replacing with the exact same brand that they usually install, so no new major piping was rquired other than the usual new connectors. Waived the delivery fee for the new unit which was in Pomona several hours away on high traffic congestion day.. Salvador was also the installer, very capable and workmanlike. Had the whole worksite set up and old unit ready for removal when the delivery/installation guys arrived on the hottest day of the year. When the new alumuinum drain pan got dented in the installation on our raised pad which didn't look good, he pro-actively had the team pull the new unit back off and installed another replacement drain pan to make sure we were happy with the results. After the delivery guys left when the unit was in place, he worked for several more hours finishing at 7 pm. Showed good workmanship, gave us good advice. We were very happy with Salvador and the company so far at this point. Obviously the proof of the pudding will be in the new unit and our service contracts and warranties, but we're off to a very good start and would highly recommend based on this experience on Day One!
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Koosha Mortazavi profile picture
Koosha Mortazavi
5 September 2026
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Justin was great very professional and explained in details. Their service is great but the company is pricey.
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Terri Mason profile picture
Terri Mason
29 August 2026
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I am more than satisfied with the service I received from Castleworks Home Services. From taking my phone call after hours when I discovered that my water heater was broken and leaking, and scheduling an appointment for the very next day… to keeping me updated on the estimated arrival time of my technician including a text with his full name and photo ID was truly impressive. But what was even more impressive is the actual service itself. Justin, the technician, was extremely easy to work with. He was knowledgeable, polite, explained everything, answered all of my questions, and completed all of the work in one visit. I couldn’t ask for a better experience and highly recommend this company! 5 ⭐️⭐️⭐️⭐️⭐️
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ginni ashen
21 August 2026
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On time and very knowledgeable.
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Peter Rosen profile picture
Peter Rosen
21 August 2026
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Justin is the best ever …. Thank you for sending him and for your instantaneous responses …. A+++ company
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Larry Macavinta
19 August 2026
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Great Job… Very professional and reasonable prices.
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Matthew Berkowitz profile picture
Matthew Berkowitz
19 August 2026
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We have just had 2 excellent experiences with Castleworks. Picked up the phone right away and was great with communication via phone and text to keep us informed as to when our technician would be out. And Justin the technician himself was absolutely amazing. Knowledgeable, worked clean and quick. We had such a good experience we ended up calling them back out right away for another issue with A/C that was long overdue and had another great experience with Brendan. So hard to find reputable companies that do what they say and that you can trust. Fully recommend them. Save their number!
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Vanessa Condez
12 August 2026
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James Skresvig went above and beyond for me. He even changed a hose for me, completely unrelated to the job he came to do, just to help me out because I didn't have the right tool. He answered all of my questions and was very good at explaining their services without overselling anything - more like explaining options.
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Christine Mannino profile picture
Christine Mannino
9 August 2026
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Justin went above and beyond to help us replace our water heater! Walking us through each step of the process and telling us for things to look out in the future. Would definitely recommend to any friends or family if needed.
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Rdt7
7 August 2026
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Besides getting our water heater running, James was very knowledgeable and gave me useful information about upgrading to tankless. Would definitely use again!

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The CastleWorks story began in 1995 and grew from the collaboration of many dedicated local professionals committed to service. Our family of businesses includes:

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