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Can My Boiler Overheat? 5 Causes Of An Overheating Boiler

Can My Boiler Overheat? 5 Causes Of An Overheating Boiler


The short answer is yes, your can boiler overheat. A boiler overheating is not unusual. However, this does not mean that you should ignore it since it can lead to severe problems like causing damage to other parts of the unit. In order to prevent such an occurrence, contact A-Plus Quality for boiler maintenance in the Greater Toronto Area if you notice the warning signs of an overheating boiler.

Causes of Overheating in Boilers

There are a variety of causes that lead to overheating of boilers. Luckily, at A-Plus Quality we offer boiler maintenance the Greater Toronto Area and surrounding regions to help prevent the causes of overheating. Here are some common causes of an overheating boiler:

1. High-Pressure

High pressure in the boiler acts as the primary cause of overheating. Usually, the high pressure might be a result of other malfunctions in the unit. The best way to solve this problem is to either relieve the pressure from the boiler or find and correct the malfunction causing the increase in pressure.

2. Failed Thermistor

In other cases, a boiler may overheat as a result from a failed thermistor. A thermistor's main task is to inform the PBC whether the temperature demand is less or more than the production. Therefore, when it fails, more fuel is provided. This causes the water to become too hot, leading to the boiler overheating.

3. Blockages

When a boiler overheats, it may be a result of blockages caused by central heating sludge. The central heating sludge typically forms inside the valves, radiators, and pipes and may clog the entire system. This clogging leads to back pressure. Overheating might also result from condensate blockages, which occur when the condensate pipes freeze due to cold weather.

4. Overheated pump

On some occasions overheating of the boiler might emanate from an overheated pump. Pumps must remain warm instead of hot. If a pump becomes too hot, it might lead to a seizure of the internal components and cause the boiler to overheat. The solution to this problem is to contact A-Plus Quality for boiler maintenance, or boiler repair in the Greater Toronto Area, for a professional replacement of the pump.

5. Limescale on the Heat Exchanger

Limescale forms in areas with water and is common in places containing hard water. As this limescale builds up on the heat exchanger, it may create several hotspots. These hotspots spike the temperature of the water leading to an overheated boiler.

If you have noticed any signs that your boiler is over heating, A-Plus Quality can send over one of our certified technicians to inspect the issue and provide boiler maintenance or boiler repair in the Greater Toronto Area and surrounding regions. Contact us today to schedule an appointment. 

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FAQ

  • What are mini-split advantages?

    Just as the name implies, a “mini-split” system is a “split system” however available in smaller capacities, for single room to whole house conditioning. Mini-split systems may range from as small as 9,000 BTUh per hour, comparable to say, a small window AC unit, for individual room use, up to 4 and 5 ton capacities for “Room By Room” (also known as “Zoning”) and whole house conditioning. With near universal design, mini-splits are “heat pumps” which provide both heating and cooling for a home. Here are key advantages when compared to traditional split systems:

    Efficiency- Mini-splits are highly engineered systems which offer attractive operating efficiencies, in many instances, eligible for utility company rebates.
    Heat Pump- Most mini-split systems are heat pumps, providing year-round comfort.
    Solar friendly- Due to very low power requirements, mini-splits are an ideal complement to “Net Zero Energy” homes, or any home using renewable power.
    Carbon footprint- Mini-splits are 100% electric, with zero operating emissions of any type.
    Zoning- Most mini-split manufacturers offer systems capable of room-by-room “zoning”, to account for peak demands of a room based upon construction type, exposure orientation and usage.
    Variable capacity- Mini-splits are typically DC inverter driven. That is, a variable speed compressor which modulates in proportion to instantaneous demand. Most conventional split systems, by comparison, operate with an ON-OFF strategy. (Would you use an ON-OFF switch as the accelerator in your vehicle?)
    Location, Location, Location!- Mini-split outdoor units are compact; they can be located far away from noise-sensitive areas, such as bedrooms and home offices. Mini-split indoor units have the ability to be installed where conventional systems cannot.
    They’re perfect for additions and remodels where access to current HVAC system is difficult to access.
    Modern mini-split systems are remarkably quiet; in fact, many times their operation is unnoticed by the end user.

  • Why is there ice building up on the copper pipes?

    There can be many reasons why the refrigerant pipes are freezing up but the most common issue is low refrigerant levels. If your AC unit has ice buildup turn off the unit for at least 4 hours and call us at 416-410-0337

  • Water is Leaking on my Furnace

    Water falling on to the furnace can harm your heating unit by affecting the control boards and other components enclosed in the furnace. There can be many causes to the water overflow, but the most common cases in the summer is the ice build up inside the evaporator coil due to low refrigerant level. Water build up can also be due to the evaporator coil having a crack on the base, if this is the case contact us by booking an appointment or call us today to have a technician come have a look at your unit and repair this issue before it causes excessive damage.  

  • How do I know what size unit I need?
    If you have any problems with your system, you should contact the contractor who installed the units. All our systems are covered by a 5 year parts, 7 year compressor limited warranty
     
  • What is a heat pump?

    Heat pumps use electricity to move heat from a cool space to a warm space, making the cool space cooler and the warm space warmer. During the heating season, heat pumps move heat from the cool outdoors into your warm house and during the cooling season, heat pumps move heat from your cool house into the warm outdoors. Because they move heat rather than generate heat, heat pumps can provide equivalent space conditioning at as little as one quarter of the cost of operating conventional heating or cooling appliances.

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