Many of our customers like using Della mini splits for their heat pump capability and can enjoy heating during the colder seasons. Depending on your Della model’s specs, you can use your mini split in temperatures as low as –15 or –13 degrees Fahrenheit.

This is because mini splits provide an efficient and cost-effective way to heat your home during colder times like winter. Unlike traditional heating systems, which often rely on fossil fuels or electric resistance, mini splits use the heat pump method to transfer warmth from the outside cold air. So mini splits can heat well even in freezing temperatures, and use less electricity and lower your bills for heat.

Additionally, mini splits offer multi zone heating, allowing you to heat specific areas of your home, providing greater personal comfort. Many customers also appreciate the quiet operation and quick response time, making them an ideal choice for maintaining a comfortable environment throughout the winter months.

Where you install your outdoor condenser will greatly impact how well it operates in the winter. If you plan on purchasing a Della mini split to use as your AC and heat pump, you should notice these points:

a) Elevate the unit so that it's high enough off the ground to stay at least above the highest rainfall or snowfall your area gets.

b) Placing the unit under an overhang or some sort of roof is a great way to shelter it from falling snow and ice. However, make sure that there's adequate clearance above the unit. Otherwise, it may not operate correctly.

If you’ve followed these steps or you already installed your Della model, then check out our video and article about any possible troubleshooting:

Q1: Why is my Della Mini Split not Heating in Cold Weather?

If your Della mini split is not heating during extreme cold weather, it’s likely not defective. Here are common reasons and solutions:

Defrosting Cycle:

Mini splits automatically enter defrost mode to melt ice that forms on the outdoor coil in freezing temperatures. During this time, the system won’t produce heat, and cool air may blow indoors. This is normal and ensures the unit continues to operate efficiently.

When you first switch to heating mode, automatic defrosting won’t activate until 40-50 minutes have passed. Then blow cool air for up to 15 minutes.

If your unit still doesn’t heat after defrosting, check for debris blocking the fan or coil, which can hinder the process.

Extreme Cold Conditions:

Mini splits are designed to work within specific temperature ranges. If the outdoor coil temperature drops below −5°C or the system has significant ice buildup, heating performance may temporarily be reduced.

Q2: How to Defrost a Mini Split?

Defrosting is crucial for maintaining your mini split’s heating performance in winter. Here’s how to defrost your unit effectively:

Automatic Defrost Mode:

The system will automatically enter defrost mode if the outdoor coil temperature is ≤3°C after 40–50 minutes of heating.

Defrost mode typically lasts up to 15 minutes or until the outdoor coil temperature reaches ≥23°C. Allow this process to complete for optimal performance.

Manual Forced Defrost:

If needed, you can manually activate defrost mode:

• Older Remote: Enter heat mode, then press and hold the lightbulb and leaf icons for 10 seconds.

• Newer Remote: Press the leaf icon 10 times quickly within 8 seconds. A 'C8' code will appear, indicating the defrost cycle has started.

Additional Tips for Defrosting:

• Pour hot water over the outdoor unit to melt excessive ice.

• Remove snow around the unit and ensure proper airflow.

Preventative Actions:

• Install a platform or cover above the outdoor unit to protect it from snow and ice buildup.

• Regularly check and clear debris around the fan and coil to avoid blockages.

• If defrosting fails or the unit does not resume heating, consult a technician for further troubleshooting.