Top 10 Boiler Problems Homeowners Experience

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Having a problem with your boiler can be a major inconvenience, as it can leave you without heat and hot water. It can also be dangerous, especially for vulnerable individuals such as young children and older adults. To avoid these issues, it is helpful to be aware of common boiler problems and how to fix them.

In this article, we will discuss some of the most common problems and offer possible solutions.

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Top 10 Boiler Problems Homeowners Experience & Possible Solutions

In this article, we’ll cover some of the most common boiler problems that homeowners face. From strange noises to a lack of heat or hot water, there are many issues that can arise with your boiler. We’ll explain the possible causes of these problems and offer some advice on what to do if you encounter them. Remember to always call a trained HVAC contractor for help if you’re not sure what to do or the problem persists.

1. Boiler Is Leaking

oxidized boiler pipe due to boiler leak

A common reason for a boiler leak is a problem with an internal component, such as a pump seal. If the leak is coming from the pressure relief valve, it is likely that the pressure in your system is too high. On the other hand, a leak from the pump seal could indicate that the seal has worn out.

Another potential cause of a leak around your system’s pipes is corrosion. It is also possible that the leak is a result of improper installation. In either case, we recommend consulting a trained HVAC contractor to diagnose and fix the problem. If the leak is caused by a serious fault, your HVAC contractor may recommend replacing the boiler.

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2. Low Boiler Pressure

You can usually tell if your boiler’s pressure is too low by checking its built-in pressure gauge. Ideally, the pressure should be set at 1.5 bar. Your boiler may not work properly if the pressure is below 1.

Low boiler pressure can be caused by a variety of issues, such as a system leak, bled radiators, or a failed component or seal. To identify the problem, you can look for visible signs of a leak. However, do not attempt to open the boiler’s casing. If you find a leak, contact an HVAC contractor for assistance. If you do not see a leak, you may be able to repressurize the boiler yourself, but it is best to let a professional handle it.

3. No Heating Or Hot Water Coming From the Boiler

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If your boiler is not providing heat or hot water, there could be a variety of issues causing the problem. These could include faulty motorized valves, broken system diaphragms and airlocks, low pressure, or a faulty thermostat.

One way to determine if the problem is low pressure is to check the pressure gauge. If it is below 1, the system may need to be repressurized. If the intermittent heating and hot water are due to a faulty thermostat, consult the manufacturer’s guide for potential solutions. In the event that y you cannot find a solution, contact the manufacturer for help.

If these suggestions do not resolve the issue, we recommend contacting a trained HVAC contractor. Issues such as a broken motorized valve or faulty diaphragm will require professional attention.

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4. Frozen Condensate Pipe

Condensate pipe freeze-ups are a common issue, especially during cold weather. The condensate pipe is responsible for carrying the condensate from the boiler to the outside drain. When the weather is cold, the condensate can freeze and cause a blockage in the pipe. This is more likely to happen in homes where the condensate pipe is located outside or in an unheated space, such as a garage. If the blockage is not cleared, it can cause the condensate to back up into the boiler and cause it to malfunction.

Fortunately, this problem can often be fixed easily and quickly by lagging or insulating the condensate pipe. This can prevent the condensate from freezing and causing a blockage in the future.

5. Boiler Radiator is Faulty

Cold patches on radiators are often caused by a build-up of air or sludge inside the radiator. This can prevent the heater from distributing heat evenly, resulting in cold patches in certain areas. The location of the cold patches can indicate different problems with the radiator. In many cases, these issues can be resolved by bleeding the radiator to remove the air or sludge. If you are unsure of what is causing the problem with your radiator, it is best to contact a trained HVAC contractor for assistance.

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6. Boiler Doesn’t Respond To The Thermostat

homeowner adjusting radiator temperature of oil boiler

It is important to check if daylight saving time has recently occurred, as this could affect the time on your thermostat. If the clocks have changed, be sure to adjust the time on your thermostat accordingly. If your boiler is not responding to the thermostat, the controls may be faulty or outdated. Before assuming that the thermostat is broken, try replacing the batteries or moving the thermostat closer to the boiler. If the problem persists, consult the instructions booklet or contact the manufacturer for assistance.

7. Gurgling, Banging, or Whistling Noises Coming From Your Boiler

It’s normal for boilers to make some noise while they’re running, but if you start hearing unusual noises like gurgling, banging, or whistling, it’s a good idea to call a qualified HVAC contractor. These noises can be caused by low water pressure, a faulty pump, air in the system, or even limescale build-up (also known as “kettling”). A professional will be able to diagnose the issue and recommend the best course of action.

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8. Boiler Pilot Light Keeps Switching Off

If your boiler’s pilot light keeps going out, there could be a problem with the thermocouple that cuts off the fuel supply. Another possibility is that there’s a build-up of deposits or a draft blowing the light out. If you feel comfortable doing so, you can try to reignite the pilot light yourself by following the instructions in your boiler manual. Be sure to check that the gas stopcock is on and that there are no issues with your gas supply before you start. If you’re not sure what to do or the problem persists, we recommend calling a licensed HVAC contractor for help.

This is more common with older boilers, as modern systems don’t have pilot lights and ignite electronically instead. If you’re dealing with a persistent problem with your pilot light, it might be time to think about getting a new boiler installed.


9. Boiler Won’t Turn On (No Power)

If your boiler unit won’t turn on, the first thing to do is check whether other appliances and power supplies in your home are working. If other appliances are working, confirm whether any switches have failed or tripped in the fuse box. In the event that you still can’t find the cause, it’s a good idea to call a trained HVAC contractor for help.

However, if your boiler is turning on but keeps shutting off, the pressure could be too low, or there could be a blockage that’s preventing the system from working properly. You can check the pressure gauge on your system and repressurize the boiler if it’s set below 1. If you’re not sure how to do this or the problem persists, it’s best to contact an HVAC contractor in your area.

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10. Boiler Breakdown

If you don’t address the problems mentioned above, your boiler can end up malfunctioning or breaking down completely. In this case, it’s important to contact an HVAC contractor as soon as possible to avoid being left without heating and hot water.

Older, inefficient boilers are also more likely to break down beyond repair. If you have an old boiler, it might be time to invest in a new, more efficient system. Not only will a new boiler give you the reliable heating and hot water you need, but it can also help you save on your energy bills.

Remember that you should only perform simple, low-risk checks on your boiler. Do not try to fix the problem yourself, as this can be very dangerous. If you’re not sure what to do, call a professional for help.


Call Townsend Energy For Your Home Heating Requirements

te logoTownsend Energy is the best choice for all your heating and cooling needs in the area. Our team of certified technicians is dedicated to providing you with top-quality HVAC services, including tune-ups, repairs, installations, and replacements. Our technicians have the knowledge and experience to handle any HVAC problem you might have.

At Townsend Energy, we offer competitive prices for all our services. If you need to replace your HVAC system, we’ll help you choose the best one for your home and budget. We’re committed to indoor air quality, energy efficiency, comfort, and more. If you’d like your boiler unit checked, give us a call today, and we’ll provide you with a free in-home estimate. Click the link to view our service area.

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