Garrett, IN Tankless Water Heater Repair

Tankless water heaters are designed for efficiency and convenience, but like any system, they can run into problems—but not every issue means you need to install a new tankless water heater. If your unit isn’t performing as it should, T&T Plumbing & Heating, Inc. is here to help with professional tankless water heater repair services.

Here are some of the most common tankless water heater issues homeowners in Garrett, IN, experience—and how we fix them.

No Hot Water

If your tankless water heater isn’t producing hot water, the issue could be due to ignition failure, gas supply problems, or a clogged heat exchanger. A faulty igniter or gas valve can prevent the system from heating water, while mineral buildup in the heat exchanger can restrict water flow and reduce efficiency.

To fix this, we check the gas supply, clean or replace the igniter, and flush the system to remove any sediment buildup that could be affecting performance.

Water Isn’t Hot Enough

When your water isn’t reaching the desired temperature, the cause might be incorrect thermostat settings, a malfunctioning heating element, or excessive scale buildup inside the unit. Over time, mineral deposits can coat the heating components, making it harder for your system to deliver hot water.

Our team inspects and adjusts your temperature settings, flushes the system to remove scale, and replaces worn-out heating elements to restore proper performance.

Fluctuating Water Temperature

If your water temperature keeps going from hot to cold, the problem could be a clogged inlet filter, high water demand exceeding the unit’s capacity, or a failing flow sensor. A blocked filter can restrict water flow, while a faulty sensor can prevent the system from maintaining a consistent temperature.

We clean the filter, assess whether your tankless unit is properly sized for your household needs, and replace any failing sensors to ensure a steady supply of hot water.

System Shuts Off Unexpectedly

A tankless water heater that turns off on its own is often due to overheating, ventilation blockages, or electrical issues. If the system detects unsafe temperatures, it will shut down to prevent damage. Poor ventilation can also cause the unit to overheat, while loose wiring or faulty components can interrupt power.

We diagnose the issue by checking for error codes, inspecting the venting system for blockages, and troubleshooting electrical connections to get your system running safely again.

Error Codes on the Display

Tankless water heaters are typically equipped with diagnostic systems that display error codes when something goes wrong. These codes can indicate gas pressure problems, sensor malfunctions, or system overheating.

Our technicians interpret the error codes, inspect the corresponding components, and perform any necessary repairs or replacements to resolve the issue and restore your system’s functionality.

Strange Noises From the Unit

Unusual noises like rumbling or whistling from your tankless water heater often point to scale buildup, loose components, or air trapped in the system. Sediment accumulation inside the unit can lead to loud popping sounds, while loose parts or pressure issues can create vibrations or whining noises.

We perform a full system flush to remove mineral deposits, tighten any loose fittings, and adjust the water pressure to ensure quiet, efficient operation.