The Vacation Rental Owner's Guide to Guest HVAC Complaints (And How to Avoid Them)

Complaint 1: It Is Not Cool Enough

This is the most common call we get from rental owners during peak season, and it has a few different root causes.

Thermostat confusion. Guests unfamiliar with your system may set it to 60 degrees hoping for faster cooling. It does not work that way. The system runs at the same speed regardless of how low the setting goes, and setting it too low can actually cause the unit to freeze up and stop cooling entirely. A simple laminated card near the thermostat explaining how to use the system and what a reasonable temperature range looks like goes a long way.

Undersized equipment. Rental properties, especially beach homes and condos, often have higher occupancy than a typical residence. More people, more appliances running, more doors opening and closing. A system sized for a family of four may struggle when eight guests are running the dishwasher, charging devices, and leaving the sliding door open. If guests consistently complain the home does not cool properly, it is worth having us assess whether the equipment is right-sized for rental occupancy.

A system that is past its prime. An aging unit that keeps up fine in shoulder season may not have enough capacity when it is 95 degrees and the property is fully occupied. If your system is more than 12 years old and you are getting cooling complaints in summer, that is not a coincidence.

The fix depends on the cause. A thermostat guide handles guest confusion. A load assessment handles sizing questions. A replacement conversation is what we have when the system is the problem.

Complaint 2: The House Feels Humid Even With the AC Running

This one is specifically a coastal South Carolina problem, and it is more common in beachfront properties than anywhere else.

Standard AC systems are designed to remove moisture as part of the cooling process, but they have limits. In a coastal environment with high ambient humidity, salt air, and guests constantly coming in from the beach and pool, the system can fall behind. The temperature on the thermostat says 72 degrees but the house feels like 78 because the humidity is not under control.

Guests experience this as the AC not working, even when it technically is. The review says the AC was broken. Your unit was fine. The problem was moisture.

A whole-house dehumidifier installed alongside your existing system solves this. It runs independently of the AC and pulls moisture out of the air continuously. We install these in rental properties across the Grand Strand specifically because of this issue. You can learn more on our whole-house dehumidifiers page. For a rental property, it is one of the highest-return upgrades you can make in terms of guest satisfaction.

Complaint 3: The AC Is Noisy

Banging, rattling, squealing, or a unit that sounds like it is working too hard. Guests notice sounds at night especially, and a noisy system in a bedroom wall or directly outside a window is a guaranteed complaint.

Loose components. Vibration over time loosens panels, screws, and internal parts. A maintenance visit catches these before guests do.

End-of-life compressor sounds. A compressor that is failing often makes a grinding or banging noise before it goes out entirely. If guests are reporting this, get it looked at before the next booking. A failed compressor in the middle of a stay is a much bigger problem than a noisy one.

Normal but startling sounds. Some sounds, like the expansion and contraction of ductwork or the click of a thermostat cycling, are normal but unfamiliar to guests. Again, a simple guest guide explaining what sounds are normal helps manage expectations.

Regular maintenance is what keeps noise complaints low. Systems that are serviced consistently run quieter and last longer. If you are not already on a maintenance plan for your rental property, that is the first conversation worth having.

Complaint 4: Some Rooms Are Hot, Others Are Cold

Uneven temperatures are one of the harder problems to explain to a guest who just wants to be comfortable. The master bedroom is freezing. The back bedroom is stuffy. Nobody is happy.

Duct issues. Leaking, disconnected, or poorly balanced ductwork delivers uneven airflow. Rooms far from the air handler often get less conditioned air. A duct assessment can identify where the system is losing efficiency.

Single-zone systems in multi-room properties. If your rental is a larger home and it runs on a single thermostat, there is no way for the system to treat different areas differently. One thermostat controls everything, and some rooms will always be on the losing end of that equation.

Zone control systems address this directly. They allow different areas of the home to be controlled independently, so the master suite and the back bedrooms are not fighting over the same setting. For rental properties with frequent occupancy complaints about temperature, zoning is often the long-term answer.

The Bigger Picture: Protecting Your Reviews and Your Revenue

Every one of these complaints has a version that ends in a bad review and a version that never gets written because the guest was comfortable the entire stay. The difference is almost always whether the property was maintained proactively or reactively.

Reactive maintenance means you find out something is wrong when a guest tells you. Proactive maintenance means we find it first, before check-in, before the problem shows up in your reviews.

Our VIP Maintenance Club is a good fit for rental properties specifically because it puts us on a regular schedule with your system rather than waiting for a call. We catch the small things before they become the kind of thing guests mention in a review.

We also understand that rental properties have unique timing needs. We work with owners to schedule maintenance visits during turnover windows, not during occupied stays. And when something does go wrong mid-guest, we prioritize emergency service for occupied properties because we know the urgency is different.

Smart Thermostats for Remote Monitoring

If you are managing your rental remotely, a smart thermostat is worth serious consideration. It lets you monitor and adjust the temperature from your phone, see whether guests have set the system to an extreme that could cause problems, and get alerts if something goes wrong.

We install and configure smart thermostats as part of rental property setups. It is a relatively small investment that gives you visibility you would not otherwise have until something goes wrong.

One More Thing: The Guest Guide

A simple one-page guide left in the property explaining how the HVAC system works, what temperatures are reasonable, what sounds are normal, and who to call if something seems wrong handles a surprising number of issues before they become complaints. It does not replace a well-maintained system, but it fills in the gaps that maintenance cannot.

We are happy to help rental owners put together the HVAC section of that guide based on their specific equipment.

At Coastal Air Plus, creating lasting relationships is what we are all about. That includes the rental property owners who trust us to keep their properties running the way they should, season after season. We have been doing this for the people of Myrtle Beach and Charleston since 1947. We understand the Grand Strand rental market and the specific demands coastal properties put on HVAC equipment.

You will not be oversold. You will get honest advice on what your property actually needs. Rest easy knowing our team will handle it the right way the first time.

Schedule a rental property assessment: coastalairplus.com/request-service or call 240-509-0953.

Learn more about our residential cooling services or ask us about maintenance plans built around your rental schedule.