Water Heater Not Working? Troubleshooting Guide for Atlanta Homeowners

May 15, 2026

Waking up to a cold shower is one of those household crises that demands immediate attention. But before you call for emergency service, it helps to know what you’re dealing with — some water heater problems have simple causes you can address yourself, while others require a licensed plumber as soon as possible. This guide walks through the most common symptoms and what they typically mean for Atlanta homeowners.

No Hot Water at All

This is the most alarming symptom, but the cause isn’t always serious.

For Gas Water Heaters

Pilot light is out — The most common culprit. Check the label on your heater for re-lighting instructions (usually on the front panel). This is a DIY fix.
Gas supply interrupted — Check that other gas appliances (stove, furnace) are working. If they are but the water heater isn’t, the gas valve or thermocouple may be the issue — call a plumber.
Thermocouple failure — The thermocouple senses whether the pilot is lit. When it fails, the gas valve shuts off as a safety measure. Thermocouple replacement is a common, typically inexpensive service call.

For Electric Water Heaters

Tripped breaker — Check your electrical panel. Reset it once. If it trips again, stop — there’s a reason it’s tripping, and that requires professional investigation.
Failed heating element — Electric water heaters have one or two heating elements that can burn out over time. This requires draining part of the tank and replacing the element.
Faulty thermostat — Each heating element has its own thermostat. If one fails, you may get lukewarm water or none at all.

Not Enough Hot Water (Runs Out Too Fast)

If your hot water runs out faster than it used to, the most likely causes are:

Sediment buildup — Atlanta has moderately hard water, and mineral sediment settles at the bottom of tank water heaters over time. Sediment insulates the heating element from the water, reducing effective capacity. Learn more about water heater maintenance and repair.
Undersized water heater — If your household has grown, your existing tank may not be large enough. The general rule is 10–15 gallons of capacity per person.
Thermostat set too low — The recommended setting is 120°F. Check the thermostat dial on the gas valve or behind the access panel on electric units.
A failing dip tube — The dip tube pushes cold incoming water to the bottom of the tank for heating. If it breaks, cold water mixes at the top, giving you lukewarm water faster than expected.

Water Too Hot

If scalding water is coming from your faucets, the thermostat is likely set too high or has malfunctioned. Turn it down to 120°F and monitor. If scalding water continues despite the adjustment, the thermostat has failed — call a plumber. Do not ignore overheating: a malfunctioning temperature-pressure relief (TPR) valve combined with an overheating tank is a safety concern.

Strange Noises from the Water Heater

Popping or rumbling — Almost always sediment in the tank. Water gets trapped beneath the sediment layer and causes these sounds. Flushing the tank may help; if the problem is severe, it’s approaching end of life.
Hissing or sizzling — Could indicate a leak dripping onto the burner assembly (gas) or heating element (electric). Inspect around the tank for moisture. This warrants a service call.
Ticking or clicking — Usually just pipes expanding and contracting as hot water moves through them. Normal.

Leaking Water Heater

Where the leak is coming from tells you a lot:

From the TPR valve — Either the pressure in the tank is too high, the water is too hot, or the valve itself has worn out. Don’t plug or bypass a TPR valve. Call a plumber.
From the drain valve at the bottom — Usually a worn washer or loose fitting. Sometimes fixable with a tightening; sometimes the drain valve needs replacement.
From the bottom of the tank itself — Water pooling directly under the tank usually means the tank lining has failed and the unit is corroding from inside. This is end-of-life — replacement is the only option.

When to Call Fix & Flow

If the problem isn’t something simple like re-lighting a pilot or resetting a breaker, call Fix & Flow. We handle water heater repair, tankless water heater installation, and hybrid water heater installation across Atlanta. We’ll assess whether repair makes sense or whether the unit is due for replacement.