An error code flashing on the display, water that swings from hot to cold mid-shower, or a unit that won't fire at all can turn a once-reliable tankless system into a daily frustration. Escobar Custom Plumbing provides tankless water heater repair in Royal Oaks, CA, and nearby cities like Gilroy, Marina, and Aptos, getting on-demand systems back to delivering steady, endless hot water.
As a Navien-certified, family-owned plumbing company, Escobar Custom Plumbing serves the Monterey Bay Area from its base in Royal Oaks, California. Our tankless water heater repair service handles error code diagnosis, heat exchanger descaling, flow sensor and inlet filter cleaning, igniter, flame rod, and gas valve repairs, and venting corrections on Navien, Rinnai, and other popular models. We service units in homes, rentals, and small businesses alike.
You turn on the shower and get a burst of hot water, then a stretch of cold before the heat returns. Other times, the unit flashes an error code and shuts down altogether, or it clicks over and over without ever lighting.
Scale is the number one culprit on the Central Coast, where hard water in towns like Hollister, Salinas, and Freedom coats the heat exchanger and flow sensor with minerals. Clogged inlet filters, worn igniters, blocked vents, and low gas pressure can also trip a tankless unit's safety controls.
We start by reading the error history and testing gas pressure, water flow, and venting. Then we descale the heat exchanger with a pump and cleaning solution, clean the inlet filter and flow sensor, and fix or swap any faulty components before running the unit through a full test cycle.
Your tankless heater goes back to fast, consistent hot water without the temperature swings or shutdowns. Regular descaling from that point on helps keep error codes from coming back.
Fixing a tankless unit early protects one of the most efficient appliances in your home.
Clearing scale and sensor buildup ends those frustrating hot and cold swings. Your showers stay comfortable from start to finish.
Mineral buildup forces the heat exchanger to work harder and can crack it over time. Timely service helps a tankless heater reach its full 20-year potential.
A scaled-up system burns more fuel to heat the same amount of water. Restoring clean heat transfer brings your energy use back down.
Many error codes trace back to small, fixable issues like a dirty filter or a weak igniter. Catching them now keeps your hot water from quitting at the worst possible moment.
Manufacturers often expect regular maintenance to keep their warranties valid. Proper repairs and descaling help protect that coverage.
Tankless repair connects with several other services, and these pages explain how we can help.
If you're not sure what's behind a hot water problem, water heater troubleshooting pins down the cause on tank and tankless systems alike.
When a tankless unit reaches the end of its life, water heater replacement gets a dependable new system working in its place.
Our broader water heater repair and replacement service covers everything from small fixes to full system upgrades for homes across the region.
Tankless systems pack a lot of technology into a small box, and they deserve a plumber who knows them well.
Our Navien certification gives us an inside look at how these units work and how to diagnose them quickly.
Beyond Navien, we regularly service Rinnai and other leading tankless models found in Central Coast homes.
Each tankless repair comes with our one-year parts and labor warranty, so we stand behind the fix.
Regular care gets easier for members, because $149 a year covers an annual water heater tune-up and whole-house plumbing inspection plus 2% off any work.
When a fix makes more sense than a new unit, we'll say so, and you'll see the numbers either way.
Usually, yes, since many tankless problems come from affordable parts like sensors, igniters, or filters. Because these units often last 20 years or more, repairing one that's still under 15 years old typically makes more financial sense than starting over.
Scale buildup, a dirty inlet filter, low gas pressure, or a flow rate below the unit's minimum activation point can all cause sudden cold water. Running several fixtures at once on an undersized unit can produce the same effect.
Error codes point to specific issues, such as ignition failure, overheating, venting problems, or scale buildup, and each brand uses its own code list. Your owner's manual explains the basics, but a plumber can confirm the cause and fix it safely.
Most manufacturers recommend descaling once a year, and homes with very hard water in places like Salinas and Gilroy may need it every six to nine months. A water softener upstream of the unit can stretch that schedule considerably.
Repeated clicking usually means the igniter is sparking but the burner isn't lighting, often because of low gas pressure, a faulty gas valve, or a dirty flame rod. Coastal moisture in areas like Moss Landing and Capitola can also corrode igniter components over time.
FAQs Reviewed By Marcos Escobar, Owner of Escobar Custom Plumbing and a Plumber Focused on Tankless Repair Across Royal Oaks, CA, and Beyond.
Our Navien-certified plumbers diagnose the problem, clear out scale, and test the system so your hot water flows strong again. Tell us what your unit is doing, and we'll follow up with a free estimate.
Business Name: Escobar Custom Plumbing
Address: Royal Oaks, CA, 95076
Phone: 831-706-5829
Business Hours:
Monday–Friday: 7:00 AM–5:00 PM
Emergency Service Available 24/7
Financing Available
10-year warranty on new installations
1-year warranty on parts and labor for service work
$149 Annual Membership includes:
2% off all work performed
Annual water heater service and tune-up