Most Floridians expect that the only ice issue they’ll ever face is not having enough to keep their drinks cold. However, anyone who uses a heat pump to keep their home comfortable knows that ice is something to worry about. Ice buildup and frozen coils on a heat pump indicate an issue with the system that requires attention.
Check out this guide from Fast Air Heating & Cooling to get a better sense of what’s happening when you see ice accumulation on your heat pump, or it’s not working correctly. We’re here to help you keep your equipment working flawlessly when you need heat pump services in Hernando, FL.
Are the Coils on Your Hernando Heat Pump Frozen?
A small amount of frost buildup on your heat pump is normal and not a cause for concern, especially on the rare occasions when the Hernando temperatures drop well below normal. Heat pumps have a built-in defrost cycle to melt this accumulation and will keep running without any issues. It’s only when the defrost cycle cannot keep up, and ice encases the coils that you need to investigate further.
Although you might associate frozen coils on a heat pump with wintry weather, the problem can occur anywhere, at any time. The most obvious sign is ice buildup on the outdoor unit, but other issues can also indicate ice formation. These can include:
- Error codes
- Unexpected system shutdown
- Unusual noises and smells
- Reduced efficiency and higher-than-normal bills
- Thermostat problems
What Causes Heat Pump Coils to Freeze?
Since Hernando doesn’t experience the same wicked winter weather as elsewhere, what can cause frozen coils on heat pumps? There are several potential culprits.
Faulty Defrost Cycle
If the automatic defrost cycle doesn’t work as it should, any frost buildup on the coils will keep accumulating, eventually covering them with ice. The most likely reason for this to happen is an issue with the defrost sensor. Fixing or replacing it will stop the ice buildup.
Clogged Air Filter
Hernando HVAC professionals often feel like a broken record when they remind customers to change the air filter in their equipment, but there’s a reason for the repetition. Dirty and clogged air filters are a contributing factor in many issues in both heaters and air conditioners. Accumulated dust, dirt, and debris lead to restricted airflow, which in turn causes the equipment to work harder, putting it at risk for a breakdown.
Dirty Coils
Increased wear and tear isn’t the only potential issue that can stem from failing to change the air filter. Restricted airflow can also result in airborne contaminants and dirt reaching the coils. Dirty coils impede the coils’ ability to absorb transfer heat correctly, so they become too cold and the resulting condensation freezes into ice.
Blower Motor Issues
A broken blower motor can also create conditions that allow ice to form on the heat pump’s coils. Problems in the motor can prevent the fan blades from spinning or cause them to spin intermittently or slower than they should. This, too, allows moisture inside the unit to freeze and cover the coils.
Fan Malfunctions
A malfunctioning fan can also cause frozen coils on a heat pump. Dirt accumulation on the fan blades can prevent it from spinning properly, which in turn allows moisture to accumulate inside the unit. When temperatures fall, the trapped moisture can freeze and coat the coils in ice.
Low Refrigerant
It might seem counterintuitive that low refrigerant can contribute to ice buildup on a heat pump’s coils, but it’s a common issue.
Most heat pumps never need any additional refrigerant and work for years without any maintenance. However, if the line develops a leak (usually the result of defects like loose fittings or valve failures), refrigerant can escape.
Low refrigerant levels are an issue because the heat pump needs it to pull in heat from outside to transfer into your home. Without enough, the unit has to work much harder, and there’s a good chance that the coils will freeze.
Drainage Problems
It’s crucial to keep water out of the outside unit of your heat pump. Any excess moisture inside can freeze and cause damaging ice buildup.
In many cases of frozen coils on heat pumps in Hernando, water infiltration is the source of the issue. Many homeowners find that their heat pump issues aren’t due to something wrong with the system itself but rather the slab it sits on.
Although HVAC companies ensure that outdoor units rest on level slabs during installation, the slab can tilt and put the unit off-kilter as the soil settles. This can block the drainage path and cause water to accumulate inside the unit.
It’s also common for gutters to lead to ice formation inside the heat pump. If the gutters leak and drip water onto the unit, that moisture can freeze on the coils.
Debris Around the Outdoor Unit
Airflow is critical to your heat pump working properly. An outdoor unit blockage like a buildup of leaves, overgrown grass, or other debris blocks air from reaching the condenser, potentially causing the coils to freeze.
How to Stop the Coils From Freezing on Your Hernando Heat Pump
The best way to deal with frozen coils on heat pumps is to prevent them from happening in the first place. Proper maintenance will address many of the most common trouble spots before they affect the unit’s operation. For example, professional technicians inspect and clean critical components like the fan and coils, lubricate moving parts, and double-check the refrigerant levels.
Maintaining your heat pump also means taking care of the air filter. Most experts recommend cleaning or changing it at least every three months or more often if it’s dirty. Most heat pumps will alert you to the need for filter maintenance with a code or indicator light.
If the issue is due to drainage, you’ll need to have an HVAC technician level the unit’s slab or invest in gutter repair or replacement to keep water out. Keeping up with outdoor maintenance so nothing blocks airflow to the unit is also important to prevent ongoing problems.
When to Call For Repairs
Sometimes, despite your best efforts and commitment to maintenance, your heat pump can malfunction. If changing the air filter and removing any blockages doesn’t trigger the defrost cycle and eliminate the ice from the coils, something is wrong that requires professional attention. For example, if the blower motor breaks down, a Hernando HVAC technician can repair or replace it.
While you wait for help, turn off the heat pump to allow the ice to melt. Continuing to run the unit can cause further damage. Don’t attempt to manually remove the ice, either, as this can also irreparably damage the coils.
Fast Air Heating & Cooling Will Keep Your Hernando, FL, Heat Pump Running
A heat pump is an energy-efficient way to keep your home comfortable in every season. When you have trouble with your system, Fast Air Heating & Cooling is standing by to help, whether it’s a minor concern or a significant issue.
Frozen coils on a heat pump indicate an issue that you cannot ignore. As experts in this and other common heating issues, we’ll get to the bottom of the problem and get your system back up and running quickly. We also provide comprehensive heat pump maintenance, so call or click today to schedule an appointment with one of our knowledgeable technicians.