Tankless Repair · Irvine

Tankless Water Heater Repair in Irvine

No hot water, a returning error code or a heater that keeps shutting down? Tell Dustin what the unit is doing. He diagnoses the cause and confirms the repair scope before work begins.

Based in WoodburyServing IrvineDiagnosis, repair & component replacement
Rinnai tankless water heater opened for a real Code 15 Venturi repair in Irvine
Real Rinnai Code 15 repair · Venturi assembly highlighted
5 stars on Google
★★★★★
2025 Nextdoor Neighborhood Fave award
Voted Nextdoor
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A real Irvine repair

Code 15. A sticking Venturi control disc.

Dustin found that the control disc was not moving correctly. He restored its movement and avoided replacing the complete assembly in this repair.

The right fix depends on the model and diagnosis. This case shows the work behind one repair recommendation.

See the original Code 15 repair photos →

From the client’s Google review

★★★★★
“Dustin immediately responded to my call yesterday about a Error code 15 on our Rennai tankless water heater. He was at our place within hours and quickly diagnosed and fixed our problem, and also improved our hot water delivery to our faucets. He is extremely competent, responsive, super communicative and very cost effective! Five stars all around!”
james mazzarellaRead the review on Google ↗

Tankless repair at a glance

Diagnosis first. The right service second.

Choose the path that matches what the heater is doing now.

WhoDustin Swad, owner of Ultra Home Repair
WhatTankless diagnosis, repair and applicable component replacement
BrandsRinnai specialty; Rheem, Navien and Noritz also serviced
WhereIrvine and selected coastal and South Orange County communities
Repair pricingWritten estimate after the problem and scope are identified
MaintenanceA standard tankless flush is a separate $150 service

No Hot Water, Shutdowns & Tankless Error Codes

Losing hot water changes the job from routine maintenance to an immediate household problem. Ultra Home Repair diagnoses the cause first, then explains whether the unit needs cleaning, a component repair, or a different solution.

Call when you have

  • No hot water
  • A tankless unit that will not ignite
  • An error code that remains or returns
  • A heater that repeatedly shuts down
  • Intermittent or suddenly reduced hot water

Service may include

  • System and error-code diagnosis
  • Ignition and flame-sensing checks
  • Venturi and combustion-air inspection
  • Cleaning or component replacement when appropriate
  • Flushing and descaling when scale is the actual problem
No hot water or an error code? Tell Dustin the brand, model, code and your city. Photos are helpful, but optional.

Troubleshoot a tankless heater that is not hot enough →

Check Rinnai outgoing water temperature →

Rinnai Specialist Serving Irvine

Dustin specializes in Rinnai tankless water heaters and also diagnoses and repairs Rheem, Navien and Noritz systems. Both condensing and non-condensing residential units are serviced.

Rinnai Code 11

No-ignition diagnosis involving the applicable gas, ignition, flame-sensing, venting, wiring and control conditions.

Learn about Rinnai Code 11 service →

Rinnai Code 15 & 17

On applicable models, Codes 15 and 17 can involve the Venturi control system. See Dustin’s real Code 15 control-disc repair. Code 17 is a separate blockage fault with its own diagnostic guide.

See the real Code 15 Venturi repair case →

Read the Rinnai Code 17 guide →

Tankless Water Heater Repair Questions

How much does tankless diagnosis and repair cost?

Repair pricing depends on the cause, required parts and access. Dustin confirms the repair scope and written estimate before work begins. The standard $150 tankless flush is a separate maintenance service.

Can I request an urgent repair appointment?

Call Dustin to check current availability. Business hours are daily, 8:00 AM–6:00 PM. Same-day or 24-hour service is not guaranteed.

Does no hot water always mean the unit needs replacement?

No. Shutdowns can be caused by maintenance conditions, ignition problems, airflow or venturi issues, sensors, wiring or failed components. Diagnosis should come before a replacement recommendation.

Can a flush restore a tankless heater that stopped working?

A flush may help when water-side scale is contributing to the problem. It will not correct unrelated ignition, venting, combustion, sensor, control-board or component faults, so diagnosis should come first when the unit has stopped working.

What if I smell gas or a carbon-monoxide alarm sounds?

Leave the area and contact the gas utility or emergency services from a safe location. Do not wait for a normal repair appointment.

Request Tankless Repair in Irvine.

Call or text Dustin when your tankless stops working or you have no hot water.

Call (949) 371-6423

What clients say

Real Reviews from Real Clients

5 stars on Google, plus Nextdoor recommendations from Ultra Home Repair clients.

★★★★★Google
Dustin from Ultra Home Repair did an excellent job professionally descaling my tankless water heater and optimizing its settings\. Before his visit, the hot water wouldn’t turn on unless I opened two faucets, and even then, it took a long time to arrive\. Since Dustin serviced the unit and switched it to Comfort Mode, the hot water has been working beautifully\. The improvement has been life\-changing\! The service cost was also very reasonable\. Ultra Home Repair is honest and upfront, and they won’t gouge you like others\. Professional, knowledgeable, and highly recommended\. Thank you, Dustin\!

Samer Kasm

View on Google ↗
★★★★★Google
Should you need anything fixed in your house, Dustin will find a solution! He will find a product that you need for fixing your problem. We have worked with him several times and will continue to do so.

Adela Piskora

View on Google ↗
Reviews 1 & 2 of 43

Read reviews on Google ↗

Client review

Google
View the original source ↗
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