Top Signs Your Hot Water System Needs Repair

Top Signs Your Hot Water System Needs Repair

top signs hot water system needs repair

A well-functioning hot water system is a cornerstone of modern living, providing us with the comfort and convenience we rely on daily. It’s often only when this essential system falters that we realize how much we depend on it for our showers, laundry, and household tasks.

the 6 most common early indicators

The above identifies the 6 most common early indicators we identified while working with our customers and their hot water systems. In this post, we will delve into these early indicators that your system needs repair work.

Insufficient Hot Water

Several factors can contribute to inadequate hot water supply.

  • Tempering valves. This valve mixes hot and cold water so only 50 degrees is delivered to the taps. A fault within this valve will result in the water not being at the expected temperature.
  • Heating element or thermostat. Water may fail to heat to the pre-set temperature or stop heating altogether.
  • Size of your system. Ensure the correct size hot water unit is installed for your requirements.
  • Pressure relief valves leaking. If the valves are leaking hot water can be wasted and cause issues for your installation.
  • Burst pipe or Hot water system.

Strange Noises

Unusual noises coming from your hot water system can often indicate underlying issues that require attention. Familiarizing yourself with the types of noises commonly associated with hot water system problems can help you identify and address potential issues promptly. Here are some common noises and their possible causes:

  • Banging or Hammering: Loud banging or hammering sounds when the hot water system is in use may indicate a condition known as water hammer.
  • Hissing or Whistling: A hissing or whistling sound often suggests a problem with water pressure or a malfunctioning valve.
  • Popping or Crackling: Popping or crackling noises typically indicate sediment buildup in the tank.
  • Rumbling or Boiling: A rumbling or boiling sound may also be due to excessive sediment buildup in the tank.
  • Continuous Running Water: May indicate a leak in the hot water system.

If you encounter any of these noises coming from your hot water system, it’s advisable to consult with a professional plumber or a hot water system specialist to diagnose the issue and recommend the necessary repairs or maintenance procedures.


Leaks in a hot water system can pose significant danger and cause damage if left unattended.

  • Property Damage: Water seeping into walls, floors, or ceilings can cause structural deterioration, mould growth, and damage to electrical systems.
  • Water Wastage: Both financially and environmentally detrimental.
  • Increased Energy Consumption: As the system continues to lose hot water through the leak, more energy is required to maintain temperature.
  • Safety Hazards: If the leak occurs near electrical components, it can increase the risk of electrical shorts or even electrical fires. Water pooling around the system or on the floor poses a slip-and-fall hazard.

Regularly inspecting the hot water system for any signs of leaks, such as dampness, water stains, or unusual water pooling and promptly addressing and repairing any identified leaks can prevent further complications and maintain the safety and efficiency of the hot water system.

Remember, early detection and timely repair of leaks not only protects your property and finances but also promotes a safe and sustainable water usage environment.

maintenance procedures

Did you know? We repair over 75% of issues with Hot Water Systems without the need for replacement!

Please call, and we will be able to assist you today.

(07) 3878 4444

Our team will give you real, honest advice and a great price. All our work is 100% guaranteed.

Discoloured Water

When you notice rust-coloured or cloudy water coming from your hot water system, it is often an indication of an underlying problem that needs attention.

  • Corroded Pipes or Tank: Older installations may have galvanised steel piping which can rust. Most modern gas and electric storage type hot water units are also made from vitreous enamelled steel. Over time the coating can break down and the steel will begin to rust.
  • Sediment Buildup: Cloudy or murky water is often caused by sediment buildup in the hot water system.
  • Water Heater Deterioration: If the water heater itself is deteriorating, it can contribute to both rust-coloured water and cloudiness.
  • Pipe Contamination: Old water supply services or repair works may introduce contaminants to your supply but are unlikely to be of any major concern and are usually temporary. However, if you suspect this to be a longer term issue, having a filter installed at the inlet to your house will solve this issue.

Some causes are definite causes for concern while others will resolve themselves. A qualified plumber will assist you with the best course of action and get your water running crystal clear again.

Fluctuating Water Temperature

Several factors can contribute to fluctuating water temperatures. Understanding them can help identify the underlying problem. Here are some common causes:

  • Thermostat Settings.
  • Sediment or Mineral Buildup.
  • Malfunctioning Heating Elements.
  • Thermostat or Control System Malfunction.
  • Faulty mixing valve or pressure balancing valve.
  • Imbalance between hot and cold water pressures.

Plumbing systems rely on pressure to push the water through pipework and out your taps. If there is a major difference in pressure between the hot and cold water supplies, it will make it difficult to get an accurate mix in your showers.

If you’re experiencing difficulties maintaining solid water temperatures, check your hot water system for any leaks and inspect the flow of water from your taps. If there are any leaks or a noticeable difference between the hot and cold taps, you’ll be able to give your plumbers a good starting point to further investigate and repair your problem.

investigate and repair problem

Unpleasant Odours

Foul or unpleasant odours emanating from hot water can be a clear indicator of an underlying problem within the hot water system with some common causes including:

  • Bacterial Growth.
  • Sediment Accumulation.
  • Anode Rod Decay.
  • Cross-Contamination between systems.

In all cases, if you’re experiencing any strange odours from your hot water, it’s important to contact a suitably experienced hot water plumber to investigate the cause.


By taking swift action and seeking professional assistance when needed, you can ensure the longevity, reliability, and safety of your hot water system. Remember, early intervention is key to avoiding unnecessary expenses and maintaining uninterrupted access to hot water for your daily needs.

Yours in keeping the good life flowing!


The Conrad Martens Team

(07) 3878 4444

For the best price, service and advice!

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