11 Common Signs Your Boiler Needs A Repair

Does your home or underfloor heating struggle to stay warm, or do you find yourself running out of hot water too quickly? These are key indicators that your boiler might need repairs or service. But there are other, less obvious signs that could point to a failing system.

Boilers are built to last, but over time, wear and tear take their toll. Knowing when to schedule repairs can help you avoid costly breakdowns or an unexpected replacement. Let’s go over the most common signs that your boiler needs professional attention.

If your hot water has a reddish or brown tint, it could indicate corrosion inside your boiler or pipes. This might be due to sediment buildup, which can be flushed out with a safe chemical treatment, or it could be a sign of internal rusting—meaning replacement may be necessary.

Some boilers have a sacrificial anode, that is designed to corrode first and protect your boiler. This is something that manufacturers recommend replacing frequently. We can help source replacement anodes to help keep corrosion at bay.

Any water pooling around your boiler is a red flag. Leaks can occur due to corrosion, pressure issues, or failing components. Even small leaks can lead to bigger problems, like water damage or mold growth, so it’s best to have them inspected immediately.

Boilers naturally make some noise when running, but loud banging, rumbling, or whistling sounds aren’t normal. These could be caused by air in the system, sediment buildup, or failing internal components. Addressing these issues early can prevent costly damage.

If your boiler runs on gas and the pilot light frequently goes out, it could be due to a faulty thermocouple, a blocked gas supply, or an airflow issue. A professional technician can diagnose the cause and ensure your system is operating safely.

Do your showers go cold too quickly? If your boiler isn’t producing enough hot water, there could be a faulty thermostat, sediment buildup, or a damaged heating element. Our annual maintenance provides a chemical flush that helps prevent the buildup of sediment and find potential failures. Ignoring this issue could lead to a complete loss of hot water.

If your hot water temperature constantly shifts from hot to cold, your boiler is struggling to maintain consistent heating. This could be due to a failing thermostat, pressure imbalances, or limescale buildup inside the heat exchanger.

Have you had your boiler repaired multiple times in the past few years? If breakdowns are becoming more frequent, it may be more cost-effective to replace your unit instead of continuing to pay for repairs. Especially if you have an older boiler, as parts become harder and more expensive to source.

Rust or corrosion on the boiler tank, pipes, or fittings is a warning sign that the externals that support your system are deteriorating. This could be caused by the boiler itself, as a result of condensation build-up or other issues. It’s important to correct these issues and verify the extent of potential damage before they become catastrophic.

An inefficient boiler has to work harder to heat your home, leading to higher energy costs. If your heating bills have increased without explanation, your boiler may not be running as efficiently as it should. Newer, high-efficiency models can significantly reduce energy consumption.

Unpleasant smells coming from your boiler can indicate a gas leak, overheating components, or bacterial growth inside the system. If you notice a sulphur or metallic odour, shut off your boiler immediately and call a professional for an inspection.

Don’t wait for a complete breakdown—if you notice any of these warning signs, it’s time to schedule a professional inspection. McMullen’s Refrigeration & Heating offers expert boiler repairs, tune-ups, and replacements in Red Deer and throughout Central Alberta. Contact us today to keep your home warm and your hot water flowing efficiently!