Frozen Heat Pumps in London, Ontario: A Homeowner’s Guide to a Proper Thaw

Winter in London, Ontario, can be a spectacle of sparkling snow and shimmering ice. But when this icy spectacle targets a homeowner’s heat pump, the beauty quickly fades. A frozen heat pump is not only an inconvenience but can also lead to decreased efficiency and potential damage if not addressed properly. MaxCare Heating & Cooling aims to provide homeowners and potential customers with the knowledge to tackle this issue effectively.

Understanding the Issue: Why Do Heat Pumps Freeze?

Heat pumps are designed to extract heat from the outside air, even during cold temperatures, and transfer it inside to warm up the home. However, during certain conditions, moisture present around the heat pump can freeze, leading to ice formation.

At first glance, it might seem strange for a device designed to produce heat to freeze. But upon deeper inspection, the reasons become clearer.

• Moisture and Cold Air Combination: The primary reason for a heat pump to freeze is the presence of moisture combined with freezing temperatures. When the moist air contacts the cold heat pump, it condenses and forms ice.
• Blocked or Restricted Airflow: The coils in the heat pump require a constant flow of air to function properly. If there’s a blockage due to debris, a faulty fan, or dirty air filters, it can cause the coil temperature to drop and lead to ice formation.
• Malfunctioning Defrost Cycle: Modern heat pumps come equipped with a defrost cycle to prevent ice buildup. If this cycle malfunctions or the sensors associated with it fail, the heat pump won’t be able to melt away the accumulating frost, leading to a thick ice layer.
• Low Refrigerant Levels: Refrigerants play a crucial role in the heat extraction process. If the refrigerant level drops due to leaks or other issues, the pump’s efficiency decreases, and the coil’s temperature can plummet, causing freezing.
• Dirty Coils: Over time, outdoor coils can collect dirt, reducing their efficiency in heat transfer. Dirt-covered coils can’t absorb heat effectively, making them susceptible to freezing.

Immediate Steps for a Frozen Heat Pump

1. Switch The Unit Off: If you notice the heat pump is covered in ice, it’s crucial to turn the unit off immediately. Continuing to operate the pump might strain the system and cause more damage.
2. Inspect for Visible Issues: While homeowners shouldn’t attempt extensive DIY repairs, a quick inspection can help identify if any visible blockages or debris are contributing to the problem.
3. Don’t Use Sharp Objects: It might be tempting to chip away at the ice using a sharp object. However, this can damage the coils and other sensitive parts of the heat pump, leading to more problems down the line.

The Importance of Professional Intervention

While some homeowners may feel equipped to handle minor issues, a frozen heat pump often requires the expertise of professionals. They can identify underlying problems, ensure the system is functioning at its peak, and prevent future freezing incidents.

1. Thorough Inspection: A professional can thoroughly inspect the unit, identifying the root causes of the freezing. This might include checking the refrigerant levels, inspecting the coil, or ensuring the defrost cycle is operating correctly.
2. Efficient Thawing: Professionals have the right tools and knowledge to thaw the heat pump without causing any damage. Moreover, they can ensure that the water resulting from the thaw doesn’t lead to other complications.
3. Preventive Maintenance: Beyond fixing the immediate issue, professionals can guide homeowners through preventive maintenance. This includes cleaning the coils, checking the filters, and ensuring the system is ready for the next cold wave.

Heat Pumps in London, Ontario: Unique Challenges

London, Ontario, presents unique challenges for heat pumps due to its cold winters. The city can experience intense cold spells, putting any heating system to the test. Being aware of these challenges and staying proactive with maintenance and quick reactions to issues can ensure that a home remains warm throughout the winter.