Troubleshoot Your Own Gas Hot Water System Problem In 8 Steps

Reliable hot water is something we take for granted – each and every day of our lives. That can be especially true when you’ve got a gas hot water system, because these technologies are renowned not only for their instant heating capabilities and efficiency, but also for their reliability. But never forget – even the best human-made systems on earth will eventually face issues. Is your gas hot water not working?

Try not to stress too much, because while gas hot water systems can be complex, understanding the basics of the troubleshooting process can be the quick fix you’re hoping for. So if you’re dealing with gas hot water not working right, follow the steps in this blog to identify and (hopefully!) resolve the issue straight away.

But first, what type of gas hot water system do you have?:

• Storage or tank-based gas hot water system?
• Instantaneous or tankless water heater?
• Gas-boosted solar hot water systems?

No matter what’s gone wrong with your gas hot water unit, this process should help:

1. Check your gas supply

Still no hot water after changing gas bottle, or after an interrupted gas supply is restored? Your system is obviously on the blink.

The Solution?: First, double-check that your gas supply is turned on and the new gas bottle (if applicable) is actually not empty. Then, see if your other gas appliances are working. If they’re not working too, it’s a supply issue, not a system issue.

2. Inspect the pilot light

Does your system have a pilot light that might just have been blown out in the wind? Bear in mind, the problem with a vanished pilot flame could also be because of a faulty thermocouple.

The Solution?: Follow the manufacturer’s instructions to safely relight the pilot light – but don’t worry, it’s easy. If it doesn’t re-light, you’ll need to get that thermocouple checked.

3. Examine the thermostat settings

Remember, it’s the thermostat that controls the temperature of your hot water. Most systems have fixed settings for maximum hot water temperatures in Australia, but if it’s been accidentally set too low, that could be why you’re dealing with an instant gas hot water not working as expected.

The Solution?: If it’s possible, check the thermostat setting on your unit and adjust it to the recommended temperature – usually around 50ºC for storage systems, although the stored water should be kept at 60ºC to deter bacteria. If adjusting the thermostat doesn’t work, you’ll need professional help!

4. Check for water leaks

Even minor leaks can lead to inefficient heating or a gas water heater not working altogether. A leak may also suggest a more serious underlying issue, like a badly corroded or ruptured tank.

The Solution?: Check around the unit for any signs of hot water leaks. If you find any, turn off the gas and water supply to the unit and contact a professional – immediately!

5. Look for error codes

Helpfully, modern gas water systems often have digital displays that show error codes if there’s any type of problem. These codes give you clues as to why you’re dealing with a gas hot water system not working.

The Solution?: Refer to your specific system’s manual for a run-down of those error codes. Bear in mind, that while some issues may be simple to fix, others might require professional assistance.

6. Flush the system:

Sediment can build up to such a degree in both storage and instantaneous systems, causing a blockage and leading to the urgent need for gas water heater repair.

The Solution?: Flushing the system can help remove sediment build-up. This is generally a simple DIY task, but if you’re not comfortable, it’s always best to call a professional.

7. Inspect for blockages

Blocked vents in the exhaust or intake vents might explain why you’re trying to cope with an instant gas hot water not working properly – or at all!

The Solution?: Look for obstructions like leaves or debris. Any vent blockage or obstruction can affect combustion and lead to safety concerns – so keeping them clear is crucial.

8. Reset the system

Sometimes, a simple reset is all that’s needed if only a minor system glitch is why you have a gas water heater not working.

The Solution?: Find your unit’s reset button, and you’ll need to press it and then probably hold it for a few seconds before releasing it – but check that manual! If it doesn’t work, something else is causing the problem.

Why is my gas hot water not working – still!?

Is your gas hot water heater not working after all of that effort? Don’t panic! We understand completely that while gas hot water systems are generally reliable, your life can be turned upside down in the chilliest kind of way when they’re not. Some of these troubleshooting steps can be handled safely and successfully at home, but don’t ever forget that gas is DANGEROUS! And most gas water heater repairs, especially those involving gas components, are best left to professionals due to strict safety regulations.

If you’re unsure, or you just need some help right now, the friendly and experienced team at S&J Hot Water Brisbane is always right here to assist with all your gas hot water system needs – from repairs and maintenance to full replacements and installations and beyond! Give us a call today.