How to Repair a Gas Water Heater

  • 01 of 06

    Repairing Your Gas Water Heater

    Gas Water Heater
    Gas Water Heater. © 2006

    Unlike tankless water heaters, standard tank-type water heaters use an insulated storage tank. Water heaters are generally very reliable but occasionally they do have problems.

    Possible Water Heater Problems

    • No hot water
    • Inadequate hot water
    • Rust colored water
    • Rotten egg odor
    • Low rumbling or popping noise
    • Higher pitched whining
    • Water leaking around base of heater

    Safety Tips Before You Begin

    • Turn off power to an electric water heater. Do this by turning off the circuit breaker or fuse powering the heater.
    • T...MOREurn the gas pilot control valve to "pilot" setting.
    • Shut off the water supply to the water heater.
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  • 02 of 06

    The Problem: No Hot Water

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    There is nothing more shiver-inducing and unpleasant than a cold shower. If your water is not at an agreeable temperature, your water heater could be at the root of the problem. Between a faulty pilot, thermocouple, or control valve, there are a number of different causes to investigate. Learn how to check for each of these possible problems and the steps you can then take to make the necessary repairs.

    How to Fix It: No Hot Water

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  • 03 of 06

    The Problem: Inadequate Hot Water

    Male Finger Turning Up Tankless Water Heater Temperature
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    What's almost as bad as a cold shower? A shower that starts out hot and quickly turns cold. If your water heater is producing some hot water, but not enough to meet your needs, there are several possible issues to address. From an undersized unit to faulty plumbing, discover how to troubleshoot this irksome issue. 

    How to Fix It: Not Enough Hot Water

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  • 04 of 06

    The Problem: Rust Colored Water or Bad Odor

    Woman cupping hands to hold water
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    It can be quite worrisome when you turn on your faucet to discover discolored water or a nasty rotten egg smell. Pipe corrosion or bacteria buildup could be the possible perpetrators in this case.

    How to Fix It: Discolored or Smelly Water

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  • 05 of 06

    The Problem: Low Rumbling or Popping Noise

    Son watching father check hot water tank with energy application on digital tablet
    Monty Rakusen / Getty Images

    If you're hearing loud mysterious noises coming from your basement–don't fret–it's probably just your water heater. The noise you're hearing is the sound of boiling water. Excessive buildup of sediment in the bottom of the tank is causing the tank to overheat, in turn causing the water to boil. You'll have to remove the sediment by flushing your water heater. Here's how:

    How to Fix It: Noisy Water Heater

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  • 06 of 06

    The Problem: Water Leak Around Base of Heater

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    Any kind of leak is always a nuisance. A leaky water heater could be the result of a faulty T&P (temperature and pressure) relief valve, or a leak from a nearby plumbing connection or even the tank itself. These problems are fairly easy to fix.

    How to Fix It: Leaking Water Heater