Gas Hot Water Not Working: Problems & Solutions

  • William Demirdonder
  • Dec 20, 2023
  • No comments
  • 15-minute read
Gas Hot Water blog

There are a few things just as good as the cosy embrace of a hot shower — the perfect remedy for a long, tiring day at work or a chilly morning wake-up call. Until, of course, your trusty gas hot water system decides it's time for an unexpected hiatus. 

The frustration of encountering a gas hot water not working situation is all too familiar for us here at Proximity Plumbing. That’s why, in this guide, we'll unravel the whys behind gas water heater hiccups and provide you with practical solutions to turn the heat back on. So, if you've ever found yourself standing in the cold, pondering how to deal with a malfunctioning gas hot water system, read on — we've got the answers to warm showers and hassle-free solutions to your gas hot water system not working.

5 reasons why your gas water heater is not working

Below, we highlight some of the most common reasons why your gas hot water system is not working properly, as well as how you can fix them. 

1. The pilot light fails to turn on

Ever stepped into the shower, eagerly anticipating a cascade of warmth, only to be met with the icy chill of disappointment? A pilot light that decides to play hide-and-seek might be the culprit behind your gas hot water not working.


Locate your pilot light and follow the manufacturer's guide to reignite it. If the flame keeps extinguishing, a malfunctioning thermocouple may be to blame. A seasoned professional plumber in gas hot water services can swiftly replace it, bringing reliability back to your water heater.

2. The thermostat is not set to the right temperature

Is your gas water heater not working as expected? A thermostat on the fritz could be the reason behind your shivering surprise.


Check and adjust your thermostat settings to ensure they match your desired water temperature. If the issue persists, consider calling in a gas hot water system specialist to recalibrate or replace the thermostat, ensuring accurate temperature control.

3. There’s a sediment buildup in the heater

Over time, sediment can accumulate at the bottom of your gas water heater, causing inefficiency and heating issues.


Regular maintenance is key. Schedule routine flushes to clear out sediment, restoring your system's efficiency and extending its lifespan. The prevention of sediment buildup helps to ensure a smoothly operating gas hot water system.

4. The gas supply is suddenly disrupted

A sudden interruption in the gas supply can leave you with a cold surprise. If your gas hot water system is not working, it might be as simple as a hiccup in the gas supply.


Check other gas appliances in your home to determine if the supply issue is localised to your water heater. If they're also not working, contact your gas supplier. If they are, it's time to call in a professional plumber to inspect your hot water system's gas valve or control.

5. You have a leaky tank

A leaking tank not only leads to water wastage but also compromises your system's efficiency.


Regularly inspect your tank for visible leaks and act swiftly if you spot one. You can also contact a gas hot water services expert to address the issue promptly. Through early intervention, you can prevent significant damage and potential system failure.

Safety precautions when fixing a gas hot water system 

Ensuring your safety is critical when attempting to troubleshoot a gas hot water not working situation. Before you roll up your sleeves, consider the following precautions:

  • Proper ventilation — Ensure proper ventilation in the area. Adequate airflow helps disperse any potential gas buildup, minimising the risk of harmful exposure.
  • Be aware of gas odours — If you detect a strong gas odour, evacuate the area immediately. Do not attempt any repairs. Contact your gas supplier or a professional in gas hot water services promptly.
  • Strictly no open flames — Avoid open flames and sparks in the vicinity. Turn off pilot lights, avoid smoking and keep electrical devices away to prevent ignition.

Proximity Plumbing can fix your gas hot water issues

Gas hot water system not working? Don't fret — Proximity Plumbing specialises in comprehensive gas hot water services to bring warmth back into your life. Our skilled professionals excel in gas fitting services, ensuring your gas hot water system operates seamlessly.

We serve the Eastern Suburbs, South East Sydney, the Lower North Shore, the Upper North Shore and more. With our exceptional gas hot water system services, you can say goodbye to cold showers and hello to reliable, expert assistance. Trust Proximity Plumbing for all your gas hot water needs!

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