What’s Wrong With Your Water Heater?
No hot water, strange noises, a leak, or water that just isn’t getting hot enough? Start with the symptom you’re experiencing and learn what may be causing it.
Water heater problems don’t all mean the same thing.
A home with no hot water may be dealing with a very different issue from one where the water is only lukewarm, the tank is making unusual sounds, or moisture has appeared around the bottom of the unit.
The guides below are designed to help homeowners narrow down what may be happening before deciding what to do next. Some problems can begin with a simple setting or power issue, while others can point to a failed component, aging tank, gas ignition problem, or leak that should be inspected professionally.
If you smell gas, see active leaking near electrical components, or believe the unit may be unsafe, avoid attempting repairs yourself and arrange professional help.

Choose what your water heater is doing
Select the symptom that best matches what you’re experiencing to see possible causes, useful checks, warning signs, and when professional service may be needed.
No Hot Water
The taps are running normally, but the water stays cold. See common causes for gas, electric, and tankless systems.
Troubleshoot no hot water →Water Not Hot Enough
Hot water turns lukewarm too quickly or never reaches the temperature you expect.
See possible causes →Water Heater Leaking
Water or moisture around the tank can come from fittings, valves, condensation, or the tank itself.
Find the source →Water Heater Making Noise
Popping, rumbling, banging, or other unusual sounds can provide useful clues about what is happening inside the unit.
Identify the noise →Pilot Light Won’t Stay Lit
A gas water heater pilot that repeatedly goes out may involve the thermocouple, gas supply, burner, or another safety component.
Check the problem →Tankless Error Codes
Your tankless system is displaying a code or warning. Understand what the alert may be telling you before resetting anything.
Understand error codes →A water heater problem doesn’t always mean you need a new unit.
Check what changed
Did the problem appear suddenly, or has hot-water performance gradually declined? A sudden loss of hot water can point in a different direction than a system that has become less effective over several months.
Look at the whole home
Check whether the issue affects one fixture or every hot-water tap. A problem isolated to one faucet or shower may not actually originate at the water heater.
Consider the type of system
Conventional tanks, gas units, electric units, and tankless water heaters operate differently. The same symptom can have different causes depending on the equipment installed.
Know when to stop troubleshooting
Gas controls, electrical components, combustion problems, significant leaks, and internal tank failures should not become DIY experiments. When the issue moves beyond basic observation, professional diagnosis is the safer next step.
From troubleshooting to repair, replacement, or maintenance.
If the problem can’t be resolved with a simple check, Proflow can inspect the water heater, identify the cause, and explain the practical options based on the condition and type of system.
Not sure what the problem is?
You don’t need to diagnose the water heater yourself before requesting service. Tell us what you’re noticing and we can start from there.
Explore Water Heating ServicesStill not sure what your water heater is telling you?
Start with the closest symptom above, or arrange professional service if the problem needs hands-on diagnosis.