Why Is My Hot Water System Not Working?

We’ve all been there, expecting warm water and instead getting a chilly shock straight from the tap. It’s a common headache in Australian homes, and understanding what’s behind the problem can save you the stress.

This blog will explain the common causes behind the problems, how to identify them, and the steps for hot water repairs and maintenance for consistent performance.

No Hot Water in the House? What Could Be Going On

1. Power or Gas Supply Issue

Without a steady supply of power or gas, your hot water system won’t be able to do its job properly. For electric hot water systems, a tripped circuit breaker or blown fuse is often to blame. For gas systems, it’s usually caused by a faulty pilot light or a gas supply problem.

2. Faulty Thermostat or Heating Element

In electric systems, the heating element can fail over time. Similarly, a malfunctioning thermostat will not signal the element to heat water, so the tank stays cold.

3. Broken Gas Valve

Gas hot water systems need the gas valve to work properly to keep the flame going. If the valve is faulty or stuck, the system won’t heat your water

4. Sediment Build-up Inside the Tank

Over time, minerals and sediment accumulate at the bottom of your tank. This build-up acts like an insulator, making it harder for your system to heat water properly, leading to lukewarm or no hot water at all.

Hot Water Not Hot Enough? What Causes This?

1. Thermostat set too low

Simple, but easy to overlook. Australian plumbing standards recommend hot water at about 50°C at the tap to avoid scalding and still provide comfort.

2. Undersized hot water system

If your household has grown or your hot water needs have increased, your current system might simply be too small to keep up, resulting in your hot water not reaching the desired warmth.

3. Faulty mixing valve

This device blends cold and hot water before it reaches your taps. If it’s stuck or broken, it will cause your water to be less hot than it should be.

What to Do When Your Hot Water System Stops Working

If your hot water system is not heating, here’s a quick checklist before calling a plumber in Sydney:

• Check your power supply or gas meter.
• Reset your circuit breaker or replace fuses.
• Inspect the pilot light on the gas system. If the pilot light is out, try relighting it following the manufacturer’s instructions or safety guidelines.
• Adjust thermostat settings.
• Look for any obvious leaks or drips around the system.

If none of these work, it’s time to get professional help.

Leaking Hot Water Tank or Pipes: Why It Happens

Leaks in your hot water system are a serious issue. They often indicate:

• Corrosion inside the tank
• Faulty valves or seals
• Cracked or damaged pipes

Ignoring leaks risks water damage to your home and system failure. It’s crucial to call our team of licensed plumbers as soon as you spot any leaks.

Should I Repair or Replace My Hot Water System?

• If your system is older than 10 years, it might be time to think about replacing it. Electric hot water systems last around 10 to 15 years, while gas ones tend to run for 8 to 12 years.
• If you’ve had to fix your system multiple times recently, replacing it can be more cost-effective in the long run.
• Are you experiencing an increased energy bill? An inefficient hot water system could be the cause. Upgrading to a newer model can help you save on running costs.
• If your hot water usage has risen due to a bigger household or lifestyle changes, switching to a larger capacity can provide the supply you need.

How to Keep Your Hot Water System in Top Shape

• Flush the tank at least once a year to clear sediment. This improves heating efficiency and water quality.
• Test and adjust the thermostat to maintain the right temperature.
• Check pressure relief valves to spot leaks or damage.
• Inspect pipes regularly to detect signs of corrosion or leaks.
• Schedule professional inspections every 6-12 months to catch issues early.

Final Thoughts

A hot water system that is not working can cause frustration, but it’s usually fixable. If you’re unsure or uncomfortable with troubleshooting, reach out to our team of hot water experts in Sydney. Call Fix N Flow at 1300 319 275 or submit our online form. Keep warm, stay comfortable, and enjoy the convenience you deserve.