Helping You Get Back to Reliable Hot Water
At MB Plumbing, we know how much you rely on your hot water system every day. Whether it is your morning shower, washing dishes, or doing the laundry, having reliable hot water is something you do not want to live without. When things go wrong, it can quickly become more than a minor inconvenience.
In this guide, we will discuss some of the most common hot water system issues we encounter in Whanganui homes and businesses and how our team recommends fixing them.
No Hot Water at All? Here’s What Could Be Going On
Power Supply Problems
When you have no hot water at all, the first thing we check is whether the system is actually getting the power or gas it needs. Sometimes, a tripped switchboard, a blown fuse, or a closed gas valve is the simple explanation. Before you call a plumber, it is worth checking your main switchboard or gas meter. If everything looks normal but you still have no hot water, it is time to give us a call — it could be an internal system fault that needs professional attention.
Faulty Thermostat or Heating Element
Another common cause for no hot water is a faulty thermostat or heating element. Over time, these parts can wear out, especially in older systems. Our team can quickly test your system to confirm the issue and recommend the best fix, whether that is repairing the faulty part or replacing it with new, energy-efficient components.
Hot Water That Runs Out Too Quickly
Sediment Build-Up in the Tank
In Whanganui, we see a lot of hot water systems struggling with sediment build-up, especially in areas with harder water. Minerals in the water settle at the bottom of the cylinder, creating a layer that makes your system work harder — and sometimes cutting your hot water supply short. Flushing the tank can help remove the build-up, but if the system is ageing or heavily scaled, we may recommend upgrading to a newer, more efficient model.
Undersized Hot Water System
If your household has grown or your hot water habits have changed, you might simply have outgrown your current system. An undersized hot water system will run out of hot water faster than you would like. Our team can assess your home’s usage and recommend a system that properly matches your family’s needs, ensuring you always have enough hot water when you need it.
Water Temperature Problems: Too Hot or Too Cold
Incorrect Thermostat Settings
One of the easiest fixes we offer at MB Plumbing is adjusting the thermostat settings. If your hot water is scalding or lukewarm, the thermostat might be set incorrectly. We can safely reset it to the right temperature — keeping your home safe, comfortable, and energy-efficient.
Broken Tempering Valve
If your water temperature swings from too hot to too cold, a faulty tempering valve could be the issue. This small but important component regulates the temperature of water coming out of your taps. If the valve fails, it can create dangerous temperature fluctuations. Our plumbers can diagnose a faulty tempering valve quickly and install a replacement to restore consistent, safe water temperatures throughout your home.
Hot Water System Leaks: What You Need to Know
Leaks From Valves or Connections
Noticing a puddle near your hot water cylinder? It is often a leaking valve, pipe fitting, or pressure relief valve. While small leaks might seem harmless, they can cause bigger problems if left untreated — including water damage and corrosion. Our team can repair or replace faulty valves and pipework quickly to keep your system running properly and your home protected.
Internal Tank Damage
If water is leaking from the body of the cylinder itself, it usually means internal corrosion or a rupture in the tank lining. Unfortunately, this is not a repairable issue — and it is a clear sign it is time to replace the hot water system. We will guide you through your options and help you select a modern, energy-efficient system that meets your household needs and budget.
Strange Noises Coming From Your Hot Water System
Rumbling or Banging Sounds
A rumbling or banging noise coming from your hot water system is not something you should ignore. It is often caused by sediment build-up that traps water under the sediment layer, creating mini steam explosions. This noise not only signals inefficiency but can also lead to tank damage over time. Our team can flush your system and, if necessary, recommend the right solution to get your system running quietly and efficiently again.
Whistling or High-Pitched Noises
Whistling or high-pitched noises usually point to excessive pressure in the system — something that can lead to leaks, damage, or even complete system failure. At MB Plumbing, we take these noises seriously. We will inspect the system’s pressure relief mechanisms and ensure everything is working safely to protect your home and your hot water supply.
How Our MB Plumbing Team Can Help
Every hot water system issue is different, and that is why our team at MB Plumbing takes the time to diagnose the problem properly before recommending the best fix. We service all types and brands of hot water systems, including electric, gas, continuous flow, and heat pump models. Whether your system needs a simple repair, a maintenance service, or a full replacement, we are here to help you find the most reliable and cost-effective solution.
We take pride in offering fast, honest, and professional service to Whanganui homeowners, landlords, and businesses. When you call MB Plumbing, you are choosing experienced plumbers who care about getting it right the first time.
Get Your Hot Water Back On Track With MB Plumbing
If you are facing any of these common hot water system issues, do not wait until it becomes a bigger problem. Our friendly team at MB Plumbing is ready to help you get your hot water sorted quickly and with no fuss.
Reach out to us today — we would be happy to help.