Electric Tankless Water Heaters

Electric Tankless Water Heater Repair & Installation in Dallas–Fort Worth

Electric tankless water heaters are becoming increasingly popular for homeowners who want endless hot water, compact sizing and improved efficiency. While gas tankless systems dominate in many homes, electric tankless water heaters offer unique advantages—especially for smaller homes, condos, additions, accessory units and areas where running gas lines is difficult or expensive. DFW Plumber provides expert electric tankless water heater installation, repair and replacement across Dallas–Fort Worth, ensuring your home receives consistent hot water with maximum efficiency.

This page explains the benefits of electric tankless systems, common issues, installation requirements, sizing considerations, electrical load requirements, maintenance needs and answers to frequently asked questions.

Why Choose an Electric Tankless Water Heater?

Electric tankless systems heat water on demand using high-powered electric heating elements instead of a traditional storage tank. They are ideal for:

• Small to medium homes without heavy simultaneous hot water usage
• Garages, workshops and ADUs needing a dedicated hot water source
• Bathroom or kitchen additions far from the main water heater
• Point-of-use applications for sinks or isolated fixtures
• Homes without natural gas service

Electric tankless heaters offer endless hot water, compact sizing and lower maintenance—but require proper electrical capacity to operate safely.

Electric Tankless Models We Install

DFW Plumber installs all major electric tankless brands, including:

• Rheem Performance & Prestige Electric Tankless
• Stiebel Eltron Tempra Series
• EcoSmart ECO Series
• Eemax Electric Tankless
• Bosch Electric Whole-House Models

We evaluate your home’s hot water demands to ensure the system is properly sized for performance.

Common Electric Tankless Water Heater Problems We Repair

Electric tankless heaters contain high-powered heating elements, sensors and flow switches. When one component fails, the entire system can suffer. DFW Plumber repairs all issues, including:

• No hot water due to failed elements or flow sensors
• Intermittent temperature changes caused by electrical supply fluctuations
• Low hot water pressure from mineral buildup
• Error codes from failed sensors, thermostats or control boards
• Burned-out heating elements (a common issue)
• Overheating shutdowns caused by scale and poor flow
• Undersized units installed by previous contractors

Most electric tankless units are repairable, especially heating element and sensor-related issues.

Electrical Requirements for Electric Tankless Units

Unlike gas tankless heaters, electric units require substantial electrical power. Before installation, DFW Plumber evaluates:

• Panel capacity (amperage)
• Number of available breaker slots
• Required breaker sizes (often 40–60 amps each)
• Required dedicated circuits (many units need 2–3)
• Wire sizing for safe current delivery

Some homes require an electrical panel upgrade to support whole-house electric tankless systems. We’ll advise whether your home is a good fit for these systems or if alternatives are recommended.

Sizing an Electric Tankless Water Heater

Proper sizing is essential for electric tankless performance. Unlike tank models, tankless units provide hot water based on:

• Flow rate (GPM)—how much water you need simultaneously
• Incoming water temperature (colder water requires more power)
• Voltage and amperage availability

DFW Plumber performs load calculations to ensure your system can support showers, sinks, dishwashers and washing machines without temperature drops.

Benefits of Electric Tankless Water Heaters

• Endless hot water without waiting for a tank to refill
• Small footprint—mounts easily on walls
• No venting required (unlike gas models)
• Lower maintenance than gas units
• 100% energy efficiency at the point of use
• Longer expected lifespan when properly maintained
• No pilot light or combustion risks

These units are especially useful where gas venting is not practical or in all-electric homes.

Maintenance for Electric Tankless Water Heaters

To maximize the lifespan of your unit, DFW Plumber recommends:

• Annual descaling to remove mineral buildup
• Cleaning filters & flow sensors
• Inspecting heating elements for wear
• Checking wiring & connections for heat damage

Texas hard water can quickly build scale inside electric tankless systems—regular maintenance prevents temperature fluctuations and flow restrictions.

Installation Locations & Options

Electric tankless heaters are versatile and can be installed nearly anywhere with proper electrical access:

• Garages
• Laundry rooms
• Bathroom walls for point-of-use applications
• Kitchen sinks
• ADUs, shops and detached structures

For whole-home systems, we typically recommend garage or utility-room installations for easier electrical routing.

When You Should Replace an Electric Tankless Heater

Replacement is recommended when you notice:

• Multiple heating element failures
• Control board burnout
• Severe scaling inside the unit
• Electrical overheating near terminals
• Age over 10–15 years
• Unit undersized for your home

Upgrading to a newer, properly sized model dramatically improves performance.

Frequently Asked Questions

Are electric tankless water heaters good for whole homes?

Yes—if your home’s electrical panel has the capacity. Many homes require upgrades for whole-house models.

Why is my electric tankless heater producing lukewarm water?

Common causes include burned-out heating elements, undersized units, low flow rate, scaling or electrical supply issues.

Do electric tankless heaters need venting?

No. They require no combustion venting, making installation easier in many locations.

Is maintenance required?

Yes. Annual descaling and element inspections prevent poor performance and extend lifespan.

Can electric tankless systems run multiple fixtures at once?

Yes, but only if the system is properly sized. Undersized units cannot keep up with high-demand homes.

Can you install an electric tankless heater I purchased myself?

Absolutely. We install all customer-provided units and verify proper electrical requirements.

For expert electric tankless water heater repair, installation and replacement anywhere in Dallas–Fort Worth, trust DFW Plumber. Visit DFWplumber.com to schedule your service today.