Mr. Sunday Plumbing
Tankless Water Heater Repair service by Mr. Sunday Plumbing

Water Heaters

Tankless Water Heater Repair

Diagnosis and repair for tankless water heater systems.

  • Upfront pricing before we start
  • Licensed & insured technicians
  • 24/7 emergency availability

Experience diagnosing tankless error codes

Descaling service for hard-water buildup

Manufacturer-appropriate replacement parts

Clear explanation of the issue found

About This Service

Tankless Water Heater Repair in the Coachella Valley

Tankless water heaters require specific expertise to diagnose properly, from error codes to flow sensor issues and mineral scale buildup. We work on the major tankless brands used throughout the Coachella Valley.

  • Experience diagnosing tankless error codes
  • Descaling service for hard-water buildup
  • Manufacturer-appropriate replacement parts
  • Clear explanation of the issue found
Tankless Water Heater Repair by Mr. Sunday Plumbing

Signs You Need This Service

Common Problems We Fix

Error Code Displayed

A fault code showing on the unit's display.

Inconsistent Hot Water

Temperature fluctuating during use.

Mineral Scale Buildup

Hard water scale restricting the heat exchanger.

Ignition Failure

The unit failing to ignite on demand.

Reduced Flow Rate

Lower hot water flow than the unit is rated for.

Unit Shutting Off Mid-Use

The system cutting out unexpectedly during use.

Warning Signs to Watch For

  • An error code on the unit's display
  • Hot water temperature that fluctuates
  • It's been over a year since the last descaling service
  • Reduced flow at fixtures using hot water
  • The unit shutting down mid-shower

Our Process

How It Works

  1. 1

    Read Diagnostic Codes

    We check the unit's error history and current status.

  2. 2

    Inspect Components

    We check the heat exchanger, sensors, and ignition system.

  3. 3

    Repair or Descale

    We complete the needed repair or descaling service.

  4. 4

    Confirm Performance

    We test hot water delivery before finishing.

Get Started

Request Tankless Water Heater Repair

Fill out the form and our team will follow up to confirm details and schedule your appointment. For urgent issues, please call us directly.

Call Now (760) 673-3090

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Customer Feedback

What Customers Say

Sample reviews shown for illustration — not verified third-party ratings.

Sample review — Emergency call late at night for a burst pipe. Fast response and fair pricing considering the hour.
D. OkaforCathedral City, CA
Sample review — Professional and courteous. Walked me through repair vs. replace options for our water heater instead of pushing the most expensive choice.
M. ReyesIndio, CA
Sample review — Called about a slow kitchen drain and the technician explained everything before starting. Drain has been clear since.
J. MartinezPalm Springs, CA

Questions

Tankless Water Heater Repair FAQs

Hard water common in the Coachella Valley causes mineral scale to build up on the heat exchanger, which can reduce efficiency and trigger error codes over time.

Mr. Sunday Plumbing branded service van

Need Tankless Water Heater Repair?

Call now or request service online — we're available 24/7 across the Coachella Valley.

(760) 673-3090

Call NowRequest Service