A Smarter Upgrade for Lowcountry Homes

Living near the South Carolina coast, your HVAC system works overtime. Between heavy humidity, salt air, and long cooling seasons, older heat pumps can struggle to keep up—especially if they’re loud, bulky, or inefficient. That’s where the new Carrier® Crossover heat pump comes in. Designed as a modern alternative to traditional systems, it’s built for homeowners who want better performance in a smaller, quieter package.

What Is a Carrier Crossover Heat Pump?

The Carrier® Crossover is a next-generation heat pump that combines the best features of ductless mini-splits and traditional ducted systems. It uses inverter technology (variable speed operation) and a compact, side-discharge design, making it ideal for homes where space, noise, and efficiency matter. In simple terms: it’s a high-efficiency upgrade that fits where older systems can’t—and performs better in coastal conditions.

Why It’s a Great Fit for Lowcountry Homes

• Handles Lowcountry Conditions Better: Built with durable, corrosion-resistant components and designed for high humidity and salt air.
• Much Quieter Operation: Significantly quieter than traditional systems, ideal for patios and close neighbors.
• Perfect for Tight Spaces: Slim, side-discharge design fits between homes, fences, or under decks.

Crossover vs. Traditional Heat Pump

Feature	Traditional Heat Pump	Carrier Crossover
Size & Design	Large, top-discharge unit (bulky footprint)	Compact, low-profile, side discharge (space-saving)
Efficiency	Single-stage or two-stage operation	Variable-speed inverter technology → higher efficiency & lower energy bills
Noise Level	Louder startup and operation	Whisper-quiet performance
Comfort Control	On/off cycling (temperature swings)	Consistent, even temperatures with better humidity control
Installation Flexibility	Requires more clearance and space	Flexible placement, ideal for coastal properties and smaller lots

What This Means for Your Home

You’ll notice lower energy bills, more consistent comfort, better humidity control, quieter outdoor spaces, and a cleaner look outside your home.

Get Expert Guidance from Carolina Air

Carolina Air understands the unique demands of Lowcountry homes. We’ll help you determine if a Carrier Crossover heat pump is right for you and ensure it’s installed for maximum performance.

Call Bill Steele at (843) 524-2581 to schedule a consultation today and explore your options.

Heat Pump Emergency Heat vs. Auxiliary Heat

What’s the Difference?

Both Emergency Heat and Auxiliary Heat (Aux Heat) are backup heating modes used in heat pump systems, typically during very cold weather when the heat pump alone can’t keep up.

• Auxiliary Heat automatically turns on when the heat pump can’t maintain the desired indoor temperature. It works alongside the heat pump and is usually electric resistance heating. It is common to smell the dust burning from these heaters during the season’s first operation.
• Emergency Heat is a manual setting on your thermostat. When activated, it shuts off the heat pump entirely and uses only the backup heat source. It’s intended for emergencies—like when the heat pump is damaged or not functioning. Make sure you only use this setting if there is a known issue with your heat pump, as it is a much more expensive heating method; hence the name “Emergency Heat”!

Heat Pump Defrost Cycle – What Happens and Why

During cold weather, moisture in the air can freeze on the outdoor coil of a heat pump, forming frost or ice. This buildup reduces efficiency and airflow. To fix this, the heat pump goes into a defrost cycle:

• Reverses operation – temporarily switches to cooling mode to warm the outdoor coil. During this switch, you may hear a loud “swoosh”.
• Outdoor fan stops – to help heat the coil and thaw any ice faster. You may also notice steam rising from the unit. That tells us it is working!
• Auxiliary heat turns on inside – to keep the home warm during defrost. However, air temperatures may not be as warm as normal during this time. Once the frost melts, the system switches back to normal heating operation. You may notice moisture in or around your unit after a defrost cycle. A defrost cycle could initiate every hour in extreme cold weather conditions.

HVAC Hurricane Prep

There are several steps you can take to prepare your HVAC system for hurricane season. Start by clearing the area around your outdoor unit. Remove loose debris, furniture, or items that could become projectiles and potentially damage the unit during high winds. You should consider pre-cooling your home to give yourself a buffer if the power goes out. Finally, before the storm hits, shut off power at the breaker for both the indoor and outdoor units to help prevent electrical surges and damage.

Extra preparation before the storm

Get a dedicated surge protector:
A surge protector can safeguard your HVAC system from power surges.

Be ready with a backup generator
Especially if you rely on your HVAC for health concerns, consider having a backup generator ready in advance in the event of extended power loss.

After the Storm

Before powering on your hvac system, check for visible damage (dents, broken fins, disconnected wires, debris in the fan). Look for evidence of flooding around the outdoor unit. Water and electricity don’t mix! If you believe your system may have been flooded, call Carolina Air to schedule a professional to confirm the system is safe to operate.

Safety Precautions
Shut your system down if you notice any these indicators:

• Any sign of flooding or damage in or around the outdoor unit
• Unusual noises (buzzing, grinding)
• Burning or abnormal odors
• Breaker trips after turning on

If you have any concerns about the condition of your HVAC system after the storm, call Carolina Air to schedule a professional inspection. (843) 524-2581.

Keep Your Drain Lines Flowing

When you are cooling your home, both heat and moisture are removed from the warm humid air inside your home. The collected water is drained out of your system and removed from your home. A typical HVAC system has several ways to drain the water to prevent equipment malfunction from water buildup or damage to your home from leaks.

The primary way the water is removed is by the condensate drain line. Moisture builds up on the evaporator coil inside the indoor unit (usually located in the attic) and collects in a drip pan – also inside the indoor unit – and then flows out the condensate drain line.

Sometimes there is a blockage in the condensate drain line and the water will drip out of the indoor unit and into an overflow pan which is located underneath it. The overflow pan also has its own drain line to the outside of your home.

If there is buildup of water in the overflow pan, or if water is dripping out the overflow drain line, it indicates a clog or blockage with the primary condensate drain line and your drain line should be serviced.

How can I tell if I have a clog in my drain line?

If water is collecting in your overflow pan, it may indicate a clog in your condensate drain line. If the water continues to build up in the overflow pan, it may also indicate a clog in the overflow drain line.

Other symptoms of a clog include:

• Musty, moldy smell near your indoor unit or in air from the registers/vents
• Standing water or water damage near the indoor unit
• AC system is not working properly
• If Carolina Air installed your system, we wire the thermostat to go blank when the float switch trips due to water in the primary drain or the secondary drain pan.

What causes a blockage or clog?

The most common reason for a clog is a buildup of dirt, dust, rust, lint and other common debris in your drain line.

What can I do to clear a blockage?

If you suspect that you have a clog, we recommend that you contact us for service on your system.

Is there a DIY remedy?

Yes, Do-It-Yourselfers can use a Shop Vac to remove the water, by attaching the Vac to the terminal outlet of the primary and/or secondary drain line. Be advised that this does not always remove all the clog and a secondary clog may occur.

What can I do to prevent a clog?

By far, the easiest way to prevent a clog is to have a Service Agreement with Carolina Air. With a Service Agreement, we come out twice a year to service your system. We inspect and clean your drain lines.

How can I protect my home from leaking water?

We can install a float switch on your system. If too much water drips into the overflow pan, the float switch will shut down the system. It will stop dripping and prevent water from leaking out of the overflow pan and causing damage to your home.