Comfort Masters · Heating & Cooling

HVAC Knowledge Base

HVAC tips, maintenance guides, and expert advice from Comfort Masters. Learn how to keep your Grand Strand home comfortable in every season.

Outdoor heat pump condenser showing salt corrosion at a Sunset Beach, NC home

Salt air and HVAC in Calabash and Sunset Beach, NC

Salt air is hard on HVAC equipment, and the damage starts long before anything looks wrong. In Calabash and Sunset Beach, homes sit close enough to open water that salt settles on the metal that has to shed heat all summer. Here is what corrodes, the cadence that fights it, and when to call.

An HVAC technician measuring a home to size a replacement system

Is it Cheaper to Replace Your HVAC in the Off-Season?

Replacing an HVAC system in the off-season usually does cost less on the Grand Strand, but the saving comes from an open schedule, a shorter lead time, and room to size the system properly before equipment is ordered. Here is a month-by-month timing guide for coastal South Carolina, plus what the calendar does not change.

Newly installed condenser set on a pad with the line set and disconnect connected

HVAC Installation Day in North Myrtle Beach: What to Expect

A new system usually goes in inside one day. Here is how installation day runs on the Grand Strand, from the walkthrough and the old unit coming out to startup readings and the final sign off, and exactly what paperwork you should be holding when the truck pulls away.

Salt and mineral crust packed between the fins of an outdoor unit coil, with rust spreading across the coil face

9-Step Fall HVAC Checklist to Get Your Heat Pump Ready for Winter in North Myrtle Beach

A Grand Strand heat pump spends six months cooling, then gets asked to run in reverse on the first cold morning. These nine fall steps cover the filter, the outdoor coil, the defrost cycle, auxiliary heat, the thermostat, the condensate drain, and the ducts, plus the instrumented half of the job that needs a licensed technician.

Condensation on the inside of a window in a closed-up coastal home on a humid day

What Temperature to Leave a Vacant Beach House in North Myrtle Beach

An empty beach house on the Grand Strand is not at risk from heat. It is at risk from moisture. Set the thermostat to 78 degrees on cool with the fan on auto, hold indoor humidity in the range the EPA recommends, and handle the filter, the condensate drain, and the outdoor coil before you lock up.

Close-up of frost forming on the aluminum fins of a residential heat pump outdoor coil

Why is My Heat Pump Blowing Cold Air?

Cold air from a heat pump is usually a defrost cycle, sometimes a thermostat mode, and occasionally a real fault. Here is how to tell the difference in fifteen minutes, what aux heat and emergency heat each do to your bill, and when to shut the system down and call Comfort Masters.

Technician inspecting an outdoor heat pump at a coastal Carolina home during a fall heating check

Heating Repair vs. Replacement for Coastal Carolina Homes

Repair or replace? On the Grand Strand most homes heat with a heat pump, not a furnace, so the national age rules do not transfer. We compare the two paths on what you can know up front, lifespan and salt-air wear, winter running cost, and process, then show the written diagnosis that decides it.

Technician inspecting attic ductwork for damage in a North Myrtle Beach home

7 Signs Your Ductwork Is the Problem, Not Your AC, in North Myrtle Beach

An AC that runs fine but a home that still is not comfortable often points to the ductwork, not the unit. This guide covers the 7 signs that separate a duct problem from an AC problem, from uneven room temperatures to rising bills, and what each one means for a North Myrtle Beach home.

Corroded outdoor AC condenser fins on a coastal Grand Strand home after salt-air exposure

Salt Air and Your AC: What It Does to a Condenser

Salt air corrodes a coastal condenser years before its time. Here is how the damage actually happens, which parts fail first, what a homeowner can do about it with a garden hose, and the signs that mean it needs a technician.

Technician cleaning the air handler cabinet and blower during a scheduled HVAC maintenance visit

Are HVAC Maintenance Plans Worth it on the Grand Strand?

An HVAC maintenance plan is a contract for scheduled labor, not a warranty. This guide covers what each visit includes, what the one-visit and two-visit tiers cost against a single service call, why salt air and a six-month cooling season change the math on the Grand Strand, and the two cases where a plan is not the right buy yet.

Technician measuring the exterior wall of a Grand Strand home before sizing a new AC

Manual J Load Calculation: Why AC Sizing Is Not a Guess

A Manual J load calculation decides how much cooling your home needs, and square footage cannot answer that on the Grand Strand. Here is what the calculation measures, why an oversized system leaves humidity behind in a hot-humid climate, and the four documents to ask for before you sign an installation quote.

Technician reviewing a written AC repair quote with a homeowner beside a Grand Strand condenser

How Much Does AC Repair Cost in Myrtle Beach?

AC repair in Myrtle Beach typically runs $259 to $374, and the diagnostic visit that tells you which end you are looking at costs $95. This guide breaks down what the service call covers, what the common component failures run, what salt air does to the number, and when a repair stops being worth it.

High-efficiency air conditioner condenser installed at a coastal North Myrtle Beach home on the Grand Strand

SEER2 Explained: What Efficiency Rating is Worth Paying for in Coastal South Carolina

A South Carolina air conditioner install must meet at least 14.3 SEER2, and the equipment above that floor climbs steeply in price. We compare the minimum and high efficiency tiers on cost, payback across a long coastal cooling season, humidity control, and salt-air durability, then show why a Manual J load calculation decides the tier rather than the sticker.

Outdoor heat pump condenser beside a raised coastal vacation rental home on the Grand Strand

8 HVAC Steps for Grand Strand Vacation Rentals and Second Homes

A vacation rental or second home is harder on an HVAC system than a full-time house: it sits empty between bookings, runs at full tilt in July, and takes salt air on the outdoor coil year-round. These 8 steps cover thermostat and humidity settings for an empty house, filter and drain cadence, coil rinsing, maintenance agreements, remote monitoring, and a hurricane-season restart sequence for Grand Strand owners.

HVAC technician using a flashlight to check an AC drain pan for cracks inside a utility closet

Water Leaking from your AC? Clogged Condensate Drain Fixes for Coastal SC

Water pooling under your indoor AC unit almost always traces back to a clogged condensate drain. Here is what to check in the first fifteen minutes, the less common causes that need a technician, and how Comfort Masters diagnoses and fixes a leak across North Myrtle Beach and the Grand Strand.

Outdoor heat pump unit at a Grand Strand home, representing the 2026 federal HVAC tax credit changes

Federal HVAC Tax Credit 2026: What Changed for 25C

The federal 25C tax credit for HVAC and heat pump equipment ended December 31, 2025. We break down what the credit used to cover, correct a few common misunderstandings about eligibility, and cover what still lowers the cost of a system today, from financing to a correct load calculation.

HVAC technician using gauges to diagnose why an evaporator coil keeps freezing over

Why is my AC freezing up? Frozen Coil Steps for North Myrtle Beach

Ice on the coil means the system is running below freezing, and running it that way is what turns a cheap fix into an expensive one. Here is why an AC freezes up, how to thaw a frozen coil safely, what never to do to it, and the signs that mean you need a technician on the Grand Strand.

HVAC technician inspecting an evaporator coil and air handler for moisture in a coastal Carolina home

Why Won’t My AC Lower the Humidity in Coastal South Carolina

Your air conditioner runs all day, but the house still feels sticky. Here is why a coastal South Carolina AC can cool the air without pulling the moisture out of it, the three things you can check yourself, and when the muggy air needs a technician from Comfort Masters.

Comfort Masters technician inspecting a condensate drain line on a coastal Carolina air conditioner

Why Your AC Smells Musty: Causes and How to Fix It

A musty or mildew smell from your AC almost always means mold or trapped moisture inside the system. Here are the common causes, how to fix each one, how coastal humidity makes it worse, and when a musty smell is a sign to call Comfort Masters across North Myrtle Beach and the Grand Strand.

HVAC technician arriving for dryer vent cleaning service

Dryer Vent Cleaning: Why It Matters and How Often to Do It

A dryer vent packed with lint is a fire hazard and a drag on how well your dryer works. Here is why dryer vent cleaning matters, how often to do it, the warning signs it is overdue, and what a professional cleaning involves for a coastal Grand Strand home.

Comfort Masters technician cleaning a home air duct system in North Myrtle Beach, SC

How much does air duct cleaning cost in North Myrtle Beach? (2026)

Professional air duct cleaning in North Myrtle Beach usually runs about 450 to 1,000 dollars per system, according to the EPA. Here is what changes that number on the coast, when a cleaning is actually worth doing, and how Comfort Masters inspects the ducts and quotes the work in writing before starting.

Homeowner sliding a pleated one-inch filter into a return-air vent in a coastal South Carolina home

How often should you change your HVAC air filter in SC?

Most one-inch HVAC air filters in coastal South Carolina need changing every 30 to 60 days, sooner than the usual 90-day rule, because salt air, humidity, and heavy summer runtime load them faster. This guide covers what sets your real schedule, how to check and change a filter, common myths about MERV, and when a clogged filter is a sign to call a professional.

Homeowner reviewing HVAC payment and financing options with a technician in North Myrtle Beach, SC

HVAC Financing and SC Rebates: Ways to Pay for a New System

Paying for a new HVAC system comes down to a few moving parts: monthly-payment financing, any rebate your utility currently runs, and a right-sized install that keeps long-term costs down. Here is how financing works, where the federal 25C tax

Homeowner reviewing a written HVAC estimate with a technician in North Myrtle Beach, SC

How to Choose an HVAC Company in Myrtle Beach

Choosing an HVAC company in Myrtle Beach comes down to a few checks: a current SC or NC contractor license, a written estimate backed by a load calculation, and reviews read for specifics, not just stars. Here is what to

Outdoor heat pump unit at a Grand Strand coastal home shown beside a gas furnace for comparison

Heat Pump vs. Furnace for Grand Strand Homes

A heat pump heats and cools a Grand Strand home from one outdoor unit, while a furnace only heats. We compare the two on upfront and operating cost, coastal winter performance, comfort, lifespan, and installation, then show how a load

Comfort Masters technician checking an outdoor AC condenser during a North Myrtle Beach heat wave

What to Do When Your AC Breaks During Beach Season

When your AC quits during beach season, you need answers fast. Here is what to check in the next fifteen minutes, the heat-safety signs that turn a broken AC into a real emergency, and how Comfort Masters gets cooling back

Dirty filter being pulled out of a through-the-wall air conditioner

Window Units

A great idea for emergency situations for air conditioning or heating is to have a window unit

Roofer in a hard hat working on a metal roof

Importance Of Fresh Air

The reason HVAC contractors put fresh air in a home is to combat CO2 build-up and pockets of stale air.

Technician connecting a refrigerant manifold gauge set to an HVAC unit

Most Efficient Home Setup

A topic I’ve done a lot of thinking on is the most cost effective and efficient home set up you can do.

Close-up of a dirty outdoor coil behind its protective grille

The Perils Of “Maintenance”

What does maintenance mean to you? It should mean maintaining your HVAC system to make it last longer calls.

ECM blower motor mounted in an air handler's blower housing

ECM Motors

So there are some brands namely Carrier and its associates that decided to put ECM motors into basic air handlers.

Insulated TXV sensing bulb strapped to the suction line next to copper tubing

TXV’s & Sensing Bulbs

I’ve been on many of these calls now since I started my business. A sensing bulb is suppose to only sense the temperature

Orange sludge on asphalt around the outlet of a PVC condensate drain

Homemade Drain Traps

I’ll start by saying there are situations, especially in older homes, where you have no choice but to make your drain trap

Horizontal air handler installed on a platform in an attic

Gierschick Install & Home Warranty Lesson

This is another install I had the fortune of doing for a client, but this is also an instance of talking about Home Warranties. This started as a home warranty service call. I found a bad blower motor and the

comfort masters air conditioning new install

Perrin Installation

I had the great opportunity to install a new Goodman system for a client this past week (July 24th).

Attic floor joists with little insulation between them

Insulating Your Attic

I’ve installed batt insulation in walls, crawl spaces, and attics. I’ve also blown insulation into the attics. I like blowing insulation the most. As long as you have the right PPE gear its actually a lot of fun. This is

Ductless mini-split indoor unit mounted high on a bedroom wall

New Mini Split Installation

I recently installed a new ductless heat pump mini split. Mini Splits are great for sun rooms, add-ons to the house, garage, or a man cave/she shed. They are extremely efficient (this particular one was 19 SEER). So efficient in

Technician servicing an outdoor heat pump with a toolbox at his side

Drains & Gravity

I know this seems logical, even simple, but most people don’t seem to understand that the drain line for your HVAC unit can not go up hill without a condensate pump. All drains must flow downhill to work (AT ALL!).

Row of outdoor air conditioner units beside a home

Wires and Sunlight

Most wiring (especially for HVAC) is not rated to be in constant sunlight. The sun will degrade the wiring, dry it out, and harden it to the point where the jacket breaks apart and the copper is exposed. This can

UV light installed inside an air handler cabinet

UV Light Replacements

I replaced a UV bulb today for a client. UV lights are important in the aspect of clean air and health, but only as a means of prevention. In other words, you can not have a mold issue (especially a

Technician mounting a ductless mini-split outdoor unit on a wall bracket

First Installation at Comfort Masters

Well, I had my first install this week as my own company (Comfort Masters Heating and Cooling). It was exciting and nerve-racking, but went perfectly. I installed a new Goodman heat pump system for a special someone. They believed in

Crawl space with insulated flex ductwork and an air handler on a vapor barrier

Solving Returning HVAC Issues

This is an older home that has a second story. One heating and air system does the whole home with a part of the supply ductwork feeding upstairs into the attic to do the top floor. It was even updated

Hot rooms vs. Cold rooms

Hot Rooms vs. Cold Rooms

If you have a room that is too hot in Summer and too cold in Winter there are many different underlying problems for why this is happening. Always call an heating and air conditioning expert to find out exactly what