Come winter time, there is nothing nicer than snuggling up in front of a cosy gas heater.  Efficient, mess free and economical, it is no surprise that gas heaters are becoming more and more popular in Australian homes.  

As effective as gas heaters are, as they age there is likely to be times when your gas heater struggles to heat effectively or perhaps stops working altogether.  No one likes to wake up in the middle of the night due to the cold, only to realise that your heater has stopped working. For this reason, we recommend you conduct regular inspections of your gas heaters, so that you know what’s happening with your heater.

In this article, we list down some of the common reasons why gas heaters stop working. Read on below to learn more.

#1 – Your Thermostat Is Turned Off 

Funny as it may sound, the simplest reason a gas heater “stops working” is that the thermostat is off. In some cases, it may not be set properly. If the thermostat is indeed off, simply turn it on. After that, set it on heat mode, which is at least 5 degrees above room temperature. If your thermostat is the battery-powered kind, then it might be the problem. You can fix this by simply getting new batteries.

#2 – Lack of Fuel

It’s in the name: “gas” heater. A gas heater needs fuel to work, and it will obviously stop working if there’s not enough. The heating system will stop working if the fuel can’t power the heater more efficiently. Check if there’s a problem with the gas supply pipe, which is typically either clogged or leaking. If this is the case, you’ll need to call in a professional for repairs.

#3 – The Power Supply Is Malfunctioning

A power supply is what powers a gas heater. If the gas heater isn’t working, it’s likely caused by a power supply that has blown up. Aside from the power supply, the circuit breaker may also be at fault. Issues with the circuit breaker and power supply aren’t easily fixed, so you’ll need to contact a professional for repair work.

#4 – The Safety Switch Is On

Most modern gas heaters have a safety switch that prevents the burner and the fan from turning on if the access panel is removed. If your gas heater has suddenly stopped working, simply check the safety switch if it’s on. Remember that you can only turn this off if the furnace door is in place.

In some cases, though, the safety switch itself can malfunction, which a professional can only fix.

#5 – Issues with Internal Components

Internal issues can also affect your gas heater. Some of the most common parts that may have problems are air filters and the fan. In some cases, it can either be pilot light problems, leaking ducts, or short cycling. Like most other issues in this list, the only way to fix them is by calling a professional.


A gas heater provides heating for you to live more comfortably at home, so it’s important that it is well maintained and in good condition. If it breaks down, you have to call a professional heater repair service to fix the problem for you. If all else fails, you’ll need to replace your gas heater.

If you’re looking for licensed gas plumbers in Adelaide, look no further than Designa Plumbing! Safety is our top priority, and our team of knowledgeable and competent gas plumbing professionals will be the one to solve your problems. Contact us today to learn more!