We’re in your neighborhood mooresville
Call now! we're here 24/7


More Less
Expires on: 06/30/2024

Mooresville Tankless Water Heater Repair

Mooresville Faucet Installation

Tankless Water Heater Stopped Working

When your tankless water heater stops working, it can be frustrating and inconvenient. Here’s what you can do to address the issue:


  • Check for Power Supply: Ensure that the unit is receiving power. Check the circuit breaker or fuse box to see if there’s a tripped breaker or blown fuse.
  • Inspect Gas Supply: If your tankless water heater runs on gas, verify that the gas supply valve is open. Also, check for any gas leaks or odors around the unit.
  • Examine Water Supply: Confirm that there’s no blockage or restriction in the water supply line leading to the heater. Check for any leaks or damage to the plumbing connections.
  • Clean the Air Intake and Exhaust: Dust, debris, or insects can obstruct the air intake or exhaust vents, causing the unit to shut down. Clean these vents thoroughly.
  • Reset the Unit: Many tankless water heaters have a reset button. Press it to see if it resolves the issue. Refer to the manufacturer’s manual for reset instructions specific to your model.
  • Check for Error Codes: Tankless water heaters often display error codes to indicate the problem. Consult the owner’s manual to interpret these codes and troubleshoot accordingly.
  • Flush the System: Mineral deposits can accumulate within the unit over time, leading to reduced efficiency or malfunctions. Consider flushing the system to remove these deposits.
  • Inspect for Component Damage: Look for any visible signs of damage to components such as the heating elements, sensors, or control boards. Replace any faulty parts as needed.
  • Contact a Professional: If you’re unable to diagnose or fix the problem on your own, it’s best to seek assistance from a qualified technician. They have the expertise and tools to identify and resolve complex issues safely.


Remember, attempting to repair a tankless water heater without proper knowledge or experience can be dangerous and may void warranties. When in doubt, trust the professionals at Mister Quik Home Services in Mooresville to diagnose and repair your tankless water heater promptly and efficiently.

Brands We Work With

Leaking Tankless Water Heater

When faced with a leaking tankless water heater, immediate action is crucial to prevent water damage and potential hazards. Here’s what you should do:


Gas Icon
Turn Off Water Supply

Locate the shut-off valve connected to the water inlet line of the tankless water heater and turn it off to stop the flow of water to the unit.

Broken Icon
Cut Power or Gas Supply

If your tankless water heater is electric, switch off the power supply at the circuit breaker. For gas-powered units, shut off the gas supply valve to ensure safety.

Troubles Icon
Drain the Unit

To reduce the risk of further leakage and water damage, drain the remaining water from the tankless water heater. Connect a hose to the diagnostic valve and direct the water to a safe location.

Air Icon
Identify the Source of the Leak

Inspect the tankless water heater carefully to determine where the leak is originating from. Common areas of leakage include pipe connections, fittings, valves, or the unit itself.

Gas Icon
Tighten Connections

If the leak is minor and stems from loose fittings or connections, use a wrench to tighten them securely. Be careful not to over-tighten, as this could cause damage.

Broken Icon
Replace Faulty Parts

If the leak persists after tightening connections, it may indicate a damaged component such as a valve, gasket, or pressure relief valve. Replace these parts as necessary.

Frequently Asked Questions

Several factors could cause a tankless water heater to stop working. Common issues include a lack of power, gas supply problems, issues with the water flow or pressure, a malfunctioning thermostat, or a buildup of mineral deposits within the unit. It’s essential to check if there is power to the unit, verify the gas supply, ensure proper water flow, and inspect for any error codes or warning indicators. Regular maintenance, such as descaling to remove mineral deposits, can also prevent performance issues. If troubleshooting does not resolve the problem, it’s advisable to consult the manufacturer’s guidelines or seek assistance from a professional plumber or technician to diagnose and address the specific issue.


When a tankless water heater malfunctions or goes bad, several issues can arise. Common problems include a decrease in water temperature, inconsistent hot water supply, strange noises, or even a complete failure to produce hot water. These issues can be attributed to various factors, such as mineral deposits accumulating in the heat exchanger, a faulty heating element, a malfunctioning sensor, or issues with the gas supply (if it’s a gas-powered unit). If left unaddressed, a malfunctioning tankless water heater not only results in discomfort due to inadequate hot water but may also lead to increased energy consumption and potential damage to the unit. It’s essential to troubleshoot and address problems promptly to ensure the efficient and safe operation of the water heater.

The location of the reset button on a hot water heater can vary depending on the make and model of the appliance. Typically, the reset button is found on the thermostat or temperature control unit. It is often a red or black button that may be recessed and requires a small tool, such as a pen or paperclip, to press. However, it’s essential to refer to the specific user manual for your hot water heater or consult the manufacturer’s guidelines to accurately locate and operate the reset button, as its placement can differ across different units. If you’re unsure, it’s recommended to seek professional assistance to ensure proper handling and avoid any potential safety risks.

If your water heater is not working, there are several key components to check. First, verify that the power supply is intact, ensuring that the unit is receiving electricity or gas, depending on the type of water heater. Next, examine the thermostat settings to ensure they are correctly adjusted. Check for any tripped circuit breakers or blown fuses in the electrical panel. For gas water heaters, confirm that the pilot light is lit. Additionally, inspect the pressure relief valve for signs of leakage or issues. Sediment buildup in the tank can also impede heating efficiency, so consider flushing the tank to remove any accumulated sediment. If these basic checks don’t resolve the problem, it’s advisable to consult the manufacturer’s instructions or seek professional assistance to diagnose and address more complex issues.

One of the most common issues with tankless water heaters is the potential for mineral buildup, especially in areas with hard water. Over time, minerals like calcium and magnesium can accumulate within the unit’s heat exchanger, restricting water flow and reducing its efficiency. This can lead to decreased performance, longer time to deliver hot water, or even system failure. Regular maintenance, such as flushing the system to remove mineral deposits, is recommended to mitigate this issue and ensure the optimal functioning of tankless water heaters.

Tankless Water Heater Not Staying Hot

Experiencing a tankless water heater that isn’t staying hot can be frustrating, especially when you rely on it for consistent hot water supply. Here’s a detailed guide on what you can do to address this issue:

Faucet Installation Mooresville
  • – Check Water Demand: Tankless water heaters heat water on-demand, so insufficient demand may cause the unit to shut off prematurely. Ensure that there’s adequate demand for hot water, such as running multiple faucets or appliances simultaneously.
  • – Adjust Temperature Setting: Verify that the temperature setting on the tankless water heater is appropriate for your needs. Adjust the temperature higher if you prefer hotter water or lower if you’re experiencing scalding temperatures.
  • – Inspect Incoming Water Temperature: Extreme fluctuations in incoming water temperature, especially during colder months, can affect the tankless water heater’s ability to maintain hot water output. Consider installing a tempering valve or adjusting temperature settings to compensate for changes in incoming water temperature.
  • Check for Error Codes: Many tankless water heaters display error codes to indicate potential issues. Refer to the manufacturer’s manual to interpret these codes and troubleshoot accordingly. Common error codes related to heating issues include overheating, sensor malfunctions, or ignition failures.
  • Flush the System: Mineral deposits can accumulate within the heat exchanger over time, reducing its efficiency and causing heating problems. Perform a system flush to remove these deposits and restore optimal heat transfer.
  • Inspect Venting System: Improper venting or obstruction in the venting system can cause the tankless water heater to overheat and shut down. Check for any blockages, leaks, or damage in the venting system and ensure proper airflow.
  • Check Gas Supply: If your tankless water heater runs on gas, verify that the gas supply is adequate and uninterrupted. Insufficient gas supply or pressure fluctuations can impact the unit’s heating capacity.
  • Reset the Unit: Like many electronic devices, tankless water heaters may benefit from a reset to clear minor glitches or errors. Locate the reset button on the unit or refer to the manufacturer’s manual for reset instructions.
  • Inspect for Component Issues: Examine key components such as the heating elements, sensors, and control boards for any signs of damage or malfunction. Replace any faulty parts to restore proper functionality.
  • Contact a Professional: If you’ve exhausted troubleshooting steps and the tankless water heater still isn’t staying hot, it’s advisable to seek assistance from a qualified technician. 


Mister Quik Home Services in Mooresville has skilled professionals who specialize in diagnosing and repairing tankless water heaters. We’ll thoroughly assess the unit, identify the underlying cause of the issue, and implement effective solutions to ensure your tankless water heater stays hot reliably. Don’t let inconsistent hot water disrupt your daily routine – trust Mister Quik Home Services to keep your tankless water heater running smoothly.

Tankless Water Heater Slow to Heat

 Experiencing a tankless water heater that is slow to heat can be frustrating, especially when you’re expecting instant hot water. Several factors could contribute to this issue. Here’s a detailed guide on potential causes:

Cold Weather

During colder months, incoming water temperature tends to be lower. Tankless water heaters must work harder to raise the temperature of cold water, leading to slower heating times.

Overloaded Demand

: If there's a high demand for hot water in your household, the tankless water heater may struggle to keep up. Running multiple appliances or fixtures simultaneously can spread the available hot water thin, resulting in slower heating.

Inadequate Ventilation

Proper ventilation is essential for gas-powered tankless water heaters to operate efficiently. If the venting system is obstructed or improperly installed, it can restrict airflow and hinder the unit's heating capacity.

Mineral Build-Up

Over time, mineral deposits can accumulate inside the heat exchanger of a tankless water heater, reducing its efficiency. These deposits act as insulators, preventing the heat exchanger from effectively transferring heat to the water, resulting in slower heating.

Who to Call for Water Heater Repair

When your water heater is malfunctioning, it’s essential to call a reliable and experienced service provider for repairs. Here’s why Mister Quik Home Services in Mooresville is the ideal choice:


  • Expertise and Experience: With years of experience in the industry, Mister Quik Home Services boasts a team of highly skilled technicians who specialize in water heater repair. They have the expertise to diagnose and resolve a wide range of water heater issues efficiently.
  • Prompt and Reliable Service: We understand the inconvenience of a malfunctioning water heater, which is why we prioritize prompt service. When you call Mister Quik Home Services for water heater repair, you can expect a quick response and timely resolution of the problem.
  • Comprehensive Repairs: Whether you have a traditional tank water heater or a tankless unit, our technicians are equipped to handle all types of water heater repairs. From minor adjustments to major component replacements, we offer comprehensive repair solutions tailored to your needs.
  • Quality Workmanship: At Mister Quik Home Services, we take pride in our workmanship and strive for excellence in every repair job. You can trust our technicians to deliver high-quality repairs that restore your water heater’s functionality and efficiency.
  • Transparent Pricing: We believe in transparent pricing and never spring surprise charges on our customers. Before any repair work begins, we provide a detailed estimate outlining the cost of parts and labor, so you know exactly what to expect.

Tankless Water Heater Repair Cost

Addressing the cost of tankless water heater repair is essential for homeowners considering professional services. Here’s a comprehensive breakdown of factors influencing repair costs:


Diagnostic Fee

Typically, service providers charge a diagnostic fee to assess the issue with your tankless water heater. This fee covers the technician's time and expertise in identifying the problem. Mister Quik Home Services in Mooresville may charge a nominal fee for this initial assessment.

Nature of the Problem

The complexity and severity of the issue greatly impact repair costs. Common problems like minor leaks or sensor malfunctions may require less time and resources to fix compared to major issues such as a faulty heat exchanger or burner assembly.

Replacement Parts

The cost of replacement parts can significantly influence the overall repair expense. Depending on the specific components needing repair or replacement, prices can vary. Mister Quik Home Services uses high-quality replacement parts sourced from reputable suppliers to ensure durability and reliability.

Labor Charges

Labor costs for tankless water heater repair involve the technician's time and expertise required to complete the job. Factors such as the complexity of the repair, accessibility of the unit, and local labor rates can impact these charges.

Emergency Services

If you require emergency repair services outside of regular business hours, expect additional charges for the urgency and inconvience. Mister Quik Home Services offers prompt emergency repair services in Mooresville, ensuring you receive timely assistance when needed.

Preventive Maintenance

Investing in regular preventive maintenance can help minimize the likelihood of unexpected repairs and prolong the lifespan of your tankless water heater. Mister Quik Home Services offers maintenance plans tailored to your specific needs, providing peace of mind and potential cost savings in the long run.

It’s important to note that repair costs can vary based on individual circumstances, so it’s recommended to request a detailed estimate from Mister Quik Home Services for accurate pricing information tailored to your specific repair needs. Investing in timely and professional tankless water heater repair can ultimately save you money by restoring efficiency, preventing further damage, and extending the lifespan of your unit.


Troubleshoot Checklist:

No Hot Water Output
  • Check Power Supply: Ensure the unit is receiving power. Check circuit breaker/fuse box for tripped breaker or blown fuse.
  • Verify Gas Supply: Ensure the gas supply valve is open and check for leaks/odors.
  • Turn Off Water Supply: Locate and shut off the water inlet valve.
  • Cut Power/Gas Supply: Switch off power at circuit breaker (electric) or gas supply valve (gas).   
Not Staying Hot
  • Check Water Demand: Ensure adequate demand for hot water.
  • Adjust Temperature Setting: Verify temperature setting is appropriate.
Slow to Heat
  • Inspect Incoming Water Temperature: Adjust for extreme fluctuations.
  • Check for Error Codes: Refer to manual for troubleshooting.
General Water Heater Repair
  • Consider Professional Assistance: If troubleshooting doesn’t resolve the issue, contact Mister Quik Home Services for expert repair services.
  • Maintenance: Regular maintenance can prevent future issues and extend the lifespan of your tankless water heater

Schedule on your own without making a call. Click to get started!

New to the area? Check out these locations for some fun this weekend!
Chunky Monkey Ice Cream and Sweets
Pepper’s Express Laundry Center
Mooresville Sports Complex