A guide to the most common hot water problems.
Hot water system problems can be frustrating—but understanding the warning signs early can help prevent costly repairs or total system failure. Whether your water heater is producing no hot water, inconsistent temperatures, or unusual sounds, we’ve got the answers.
Below is a helpful guide to the most common hot water problems and what you can do about them.
No hot water at all?
If your water heater has completely stopped producing hot water, the issue usually lies with the heating element or thermostat. In electric systems, these parts are often easy to replace and don’t require a full unit swap.
For gas water heaters, the issue might be a blown-out pilot light. Try relighting it according to your unit’s manual. If it won’t stay lit, a faulty thermocouple may be to blame. Give us a call—we can sort it out quickly.
Water heater leaking
If you notice water pooling around the base of your unit, don’t ignore it. Even small leaks can lead to serious water damage.
Potential causes include:
- Corrosion in the tank, especially in older systems.
- Loose fittings or connections that need tightening.
- A faulty pressure relief valve, which may require replacement.
- Sediment damage leading to cracks or stress on components.
Our water heater service technicians can diagnose the leak and recommend either a fix or a full replacement, depending on the severity.
Water heater making strange noises
- Popping sounds often indicate sediment build-up at the bottom of the tank. As water bubbles through the debris, it makes noise.
- Banging can result from expanding and contracting metal components.
- Continuous noise is a sign your unit needs maintenance before damage occurs.
Hot water runs out quickly
Running out of hot water is often a sign that your system isn’t keeping up with household demand. This could be due to:
- An undersized tank, particularly if your family has grown or your usage has increased.
- Thermostat settings that are too low – for optimal performance, it should be around 49°C.
- A worn-out dip tube, which can cause cold water to mix prematurely with hot water inside the tank.
- Sediment build-up, which reduces capacity and heating efficiency. Flushing the tank can often resolve this.
- Upgrading to a higher-capacity, energy-efficient system might save you more money in the long run.
Water takes too long to heat up
If your water is warm but not hot—or takes forever to heat up—your system might be too small or suffering from a technical fault.
Common reasons include:
- A malfunctioning tempering valve or heating element.
- Excess sediment that’s insulating the tank base and limiting heat transfer.
- An outdated or inefficient system struggling to keep up with daily use.
Discoloured or smelly hot water
Brown, yellow, or rusty hot water often signals corrosion inside the tank. A metallic or rotten egg smell is a sign of bacterial growth, often due to a deteriorated anode rod.
The anode rod is a sacrificial component designed to attract corrosion and protect the tank interior. It should be replaced every 3–5 years to keep the system healthy. If your water heater is older than three years, call us with your model details—we can let you know if your anode is due for replacement.
WATER HEATER REPAIRS
Call Cheapa Hot Water Penrith for professional help when you need it. While some hot water problems are easy to fix, others require a licensed technician. Either way, our friendly team is here to help.
- Fully stocked trucks mean fast repairs and replacements on the spot.
- Regular servicing every five years helps prevent emergencies and extends the life of your system.
- We repair all major brands and offer honest advice tailored to your household’s needs.
Stay ahead of problems and don’t wait until your water runs cold. By addressing hot water issues early and booking regular maintenance, you’ll enjoy consistent, energy-efficient hot water all year round.
John Graham
Cheapa Hot Water