Gilbert, Arizona, Reliable Tankless Water Heater Repair and Installation

Call Second Opinion Plumbing at 480-365-9555 for same-day tankless water heater service in Gilbert, AZ.

When your home needs Tankless Water Heater Repair and Installation in Gilbert, AZ, trust Second Opinion Plumbing to deliver fast results and lasting value. Our licensed and bonded, trusted technicians provide free estimates, straightforward pricing, and no overtime charges on every visit. We service and install electric and gas on-demand water heater systems for whole-home applications and point-of-use water heater needs, bringing high-quality, speedy service and financing available to fit your budget. Proudly serving Maricopa County, we help homeowners in Val Vista Lakes, Power Ranch, Ocotillo, Sun Lakes, Las Sendas, Seville, The Islands, Red Mountain Ranch, Trilogy at Encanterra, and the Heritage District, plus nearby cities including Chandler, Mesa, Tempe, Queen Creek, Scottsdale, Apache Junction, San Tan Valley, and Gold Canyon.

Need dependable water pressure and safe supply piping before or after a tankless upgrade? Visit our Water Line Repair and Installation page for free estimates, straightforward pricing, licensed and bonded service, and no overtime charges throughout Gilbert, Chandler, and Mesa. Protect your investment with expert diagnosis and money-saving solutions across Maricopa County.

Tankless Water Heater Repair Services in Maricopa County

Tankless systems are efficient, but they need precise diagnostics to run at their best. If you are seeing error codes, experiencing ignition failures, or getting lukewarm water during showers, our experienced plumbers can help. We repair all major brands and models, restore performance, and extend equipment life with honest pricing and competitive rates with no surprises. From full-size whole home units to compact point-of-use water heaters, we provide same-day service in Gilbert and across Maricopa County.

What we fix and how we fix it:

Error codes: Reset and read codes, test sensors and thermistors, verify gas pressure or electrical supply, and perform manufacturer-specific steps to resolve flow, combustion, or temperature faults.
Ignition issues or flame failure: Clean and test flame sensors and igniters, verify proper gas line sizing and supply pressure, inspect regulators, check air intake screens, and confirm safe combustion.
Flow problems and low GPM: Clean inlet water filters and check valves, descale heat exchangers, verify minimum flow rate at fixtures, and correct plumbing restrictions for consistent instant hot water.
Temperature swings or lukewarm water: Calibrate temperature settings, inspect mixing valves, confirm adequate GPM sizing, descale exchanger, and adjust recirculation controls.
Cold water sandwich effect: Verify preheat and recirculation settings, add buffer tanks when appropriate, and optimize fixture run sequences.
Scale buildup and efficiency loss: Perform thorough descaling and flush service, replace worn isolation valves and screens, and recommend water treatment to slow future scaling.
Vent or exhaust faults: Inspect and clear venting, check condensate drains and traps, and correct improper slopes or lengths.
Freeze protection and winter readiness: Test freeze protection circuits and insulation, confirm power availability for built-in heaters, and evaluate outdoor installations.
Electrical issues on electric tankless: Test breakers, elements, relays, and wiring integrity, confirm voltage and amperage requirements, and replace failing components.
Recirculation system problems: Diagnose pumps, check valves, timers, and controls to ensure rapid hot water delivery at fixtures.

If your tankless water heater frequently shuts down, shows recurring errors, or fails to keep up with demand, give us a call. We will explain every finding in plain language and provide clear repair options so you can choose the right solution for your home and budget.

Tankless Water Heater Maintenance in Maricopa County

Arizona’s hard water is tough on tankless systems. Regular maintenance prevents mineral buildup that causes error codes, overheating, and premature failure. As a leading tankless water heater maintenance company serving Gilbert, Chandler, Tempe, and Queen Creek, we provide annual service that keeps your system reliable and efficient year-round. Our professional, friendly, and respectful technicians arrive with the right tools and follow manufacturer guidelines, protecting your warranty and your comfort.

What your annual maintenance includes:

Flush and descale procedure

Circulate approved descaling solution through the heat exchanger using isolation valves to remove mineral deposits and restore efficiency.

Inlet screen cleaning

Remove and clean cold water inlet filters and any integral screens to improve flow and prevent nuisance shutdowns.

Vent and intake checks

Inspect intake air and exhaust venting for blockages, proper clearances, slope, and secure connections for safe operation.

Water quality review

Test hardness and recommend softening or filtration to reduce scale formation and extend equipment life.

Recirculation checkup

Test pump operation, timers, thermostatic valves, and check valves to ensure fast hot water delivery and optimized energy use.

Recirculation checkup

Test pump operation, timers, thermostatic valves, and check valves to ensure fast hot water delivery and optimized energy use.

Combustion and safety testing for gas units

Inspect flame quality, verify gas pressure, perform leak testing, and confirm proper condensate drainage and neutralization when applicable.

Electrical inspection for electric units

Verify breakers, amperage, connections, and internal components for safe, steady operation.

Firmware and controller settings

Update or calibrate controller settings for comfort and efficiency, including vacation and freeze protection modes.

System health report

Provide a detailed checklist and photo documentation with prioritized recommendations and transparent and affordable pricing.

Routine maintenance helps avoid emergency breakdowns, keeps energy bills in check, and preserves your manufacturer warranty. Ask about pairing your tankless tune-up with a whole-home plumbing inspection for additional peace of mind.

Upgrading to a larger gas appliance or adding an outdoor kitchen? Visit our Gas Line Installation page for expert sizing, pressure testing, and code-compliant work with free estimates, straightforward pricing, and no overtime charges. We serve Gilbert, Sun Lakes, Scottsdale, and the wider Maricopa County area with licensed and bonded technicians.

Tankless Water Heater Installation and Replacement Services in Maricopa County

Choosing the right system and installing it correctly are essential for dependable instant hot water. Second Opinion Plumbing specializes in tankless water heater installation, conversion from tank to on-demand systems, and replacements for aging units. We work with both gas and electric options and help you evaluate capacity, efficiency, and total cost of ownership so you make a confident choice. From permits and code compliance to final startup and homeowner education, our customer-focused team handles every detail.

What we consider for a perfect installation:
Proper sizing by GPM: Calculate peak simultaneous hot water use, fixture flow rates, and temperature rise to select the right capacity for your household and lifestyle.

Gas line requirements for gas models: Verify existing gas meter capacity, line size, and pressure. Upsize and add regulators as needed for stable combustion and full output.

Electrical requirements for electric models: Confirm service panel capacity, breaker sizes, and dedicated circuits to meet amperage demands of electric tankless units.

Venting and combustion air: Use manufacturer-approved venting materials and lengths, confirm clearances, and set proper slope and condensate management for safety.

Recirculation options: Add built-in or external recirculation pumps, crossover valves, or dedicated return lines for faster hot water and reduced waste.

Location and mounting: Choose indoor or outdoor rated units, proper wall backing, service clearances, and weather protection as needed.

Water quality protection: Install isolation valves, service ports, scale reduction, and softening solutions to extend heat exchanger life.

Integration with point-of-use water heaters: For distant baths or casitas, install compact point-of-use units to eliminate long waits and maximize comfort.

Timelines and coordination: Most replacements completed same day. Conversions from tank to tankless typically completed in one day, depending on gas, vent, or electrical upgrades.

Warranties and documentation: Provide manufacturer-registered warranties, startup checklist, and homeowner training for operation and maintenance.

Financing available and no overtime charges: Keep projects on budget with flexible financing and clear, straightforward pricing.

Electric and Gas Tankless Options

Both electric and gas tankless water heaters can deliver on-demand efficiency when sized and installed correctly. Gas models generally offer higher GPM for large families and are ideal where natural gas is available. Electric tankless is a smart fit for smaller households, additions, or locations where venting is challenging, provided your electrical service can support the required amperage. Our team will run the numbers, compare utility costs, and present money-saving solutions tailored to your home in Gilbert or surrounding communities like Mesa, Chandler, Scottsdale, and San Tan Valley.

Recirculation for True Instant Hot Water

If long pipe runs cause delays in hot water at your fixtures, we design recirculation systems that maintain hot water near the tap while minimizing energy use. Options include built-in factory recirculation, external pump kits with motion or timer controls, and retrofit crossover valves for homes without a dedicated return line. The result is faster comfort and less wasted water, a popular choice in larger homes across Las Sendas, Seville, and The Islands.

Why homeowners choose Second Opinion Plumbing:

Expert diagnosis and repair done right the first time

Professional, friendly, and respectful technicians

Honest pricing with competitive rates and no surprises

High repeat customer loyalty and referrals

Same-day service across Maricopa County

Call Second Opinion Plumbing at 480-365-9555 to schedule tankless water heater repair, maintenance, or installation in Gilbert, AZ. Get free estimates, straightforward pricing, and licensed, bonded technicians.