the latest from David and Goliath HVAC

the latest news from David and Goliath HVAC

Welcome to our News & Insights page at David and Goliath Heating and Cooling! Here, we share the latest updates, tips, and trends in the heating and cooling industry. Our blog is a treasure trove of information designed to help you make the most of your HVAC systems.

Outdoor heat pump unit installed on a pad beside a brick exterior wall.

Emergency Heat Pump in Denver NC: When to Call for Help

It’s 2 a.m. on a frigid January morning in Denver, NC, and you wake up shivering because your heat pump has stopped working entirely — that’s when you need an emergency heat pump in Denver NC. While not every heat pump hiccup requires an urgent call, certain situations can’t wait until business hours. Freezing temperatures put your family’s comfort and safety at risk when your heating fails. We’ve helped countless Denver homeowners through middle-of-the-night breakdowns, so we know how stressful

Close-up of a thermal expansion valve (TXV) assembly being held during HVAC repair or replacement. Best for blogs about reversing valve problems, heat pump repair, refrigeration components, HVAC part replacement, and why your heat pump is stuck in heating or cooling mode.

Heat Pump in Denver NC: Installation & Buying Guide

Looking for a heat pump in Denver NC that can handle both our humid summers and chilly winter nights? Heat pumps have become one of the most popular HVAC solutions for homeowners in Denver and the surrounding Lake Norman area because they deliver year-round comfort in a single, efficient system. Unlike traditional setups that require separate heating and cooling equipment, a heat pump moves heat rather than generating it, which means lower energy bills and consistent temperatures no matter the

How to Keep Your House Cool in Summer: A Gaston County Homeowner’s Guide

If you have lived through even one full summer in Gaston County, you already know the pattern. The mornings start mild, the afternoon sun turns the Piedmont into a slow oven, and by three o’clock the humidity is thick enough to feel on your skin the moment you step outside. Learning how to keep your house cool in summer around Dallas, Gastonia, and the surrounding towns is not about one clever trick. It is about a handful of small habits

Wall-mounted. ductless mini split indoor unit in unfinished space.

Air Conditioner Wall Unit: Types, Benefits & Common Problems

An air conditioner wall unit is a self-contained cooling system mounted through an exterior wall, delivering efficient climate control without the need for extensive ductwork or a central HVAC system. These units are popular in single rooms, add-on spaces, older homes, and anywhere a whole-house system isn’t practical or cost-effective. Because they’re installed directly through the wall with a sleeve, they’re quieter and more permanent than window models. Plus, they free up your window space entirely. We’ve serviced countless wall

Interior view of a heat pump unit with visible refrigerant lines, compressor, and fan assembly.

Heat Pump Cherryville: Repair, Replacement & Installation Guide

If your heat pump in Cherryville has been running nonstop in the winter or barely keeping your home comfortable on humid summer days, you’re probably wondering whether it’s time for a repair or if you need a new system altogether. Heat pumps work hard year-round in our North Carolina climate. When performance starts to slip—higher energy bills, uneven temperatures, or strange noises—it’s usually a sign something needs professional attention. We serve Cherryville homeowners with honest diagnostics, expert heat pump repair,

Technician repairing wiring and electrical components inside an open residential gas furnace cabinet. Best for blogs about furnace repair, HVAC electrical issues, why your furnace won't turn on, blower motor or control board problems, professional HVAC diagnostics, and heating system troubleshooting.

Furnace Repair Cherryville: Common Causes & When to Call

When January and February temperatures drop across North Carolina, furnace repair in Cherryville becomes one of the most urgent calls we get. There’s nothing quite like waking up on a cold morning to realize your heating system has stopped working overnight — especially when your family is counting on warm air to start the day. Because Cherryville homes rely on furnaces through the coldest months, even a minor issue can quickly turn into an emergency if left unchecked. That’s why

Technician brazing or repairing refrigerant lines on an outdoor HVAC unit.

What Is a Plenum in HVAC and Why It Matters for Your Home

If you’ve been curious about what the plenum hvac component in your HVAC system actually does — or whether a problem with it could explain why your heating or cooling feels uneven — you’re asking exactly the right question. The plenum is one of those hidden components most homeowners never think about until something goes wrong. Yet it plays a crucial role in delivering conditioned air throughout your home. In fact, issues inside the plenum can quietly sabotage your comfort

Outdoor heat pump unit installed on a raised stand beside a home. Best for blogs about heat pump systems, heat pump installation, heat pump replacement, cold-climate heat pumps, energy-efficient heating and cooling, and outdoor heat pump units.

Heat Pump Crowders Mountain: Service, Repair & Installation

You’re standing on your deck after a long hike near Crowders Mountain, and the cool evening air feels perfect — until you step inside and realize your home is stuffy, uncomfortable, and your system just isn’t keeping up the way it used to. If you’re searching for reliable heat pump Crowders Mountain service, you’ve come to the right place. We serve homeowners throughout the Dallas, Gastonia, and surrounding areas with professional heat pump repair, maintenance, and installation designed to keep

Technician inspecting internal components inside an open gas furnace cabinet during service. Best for blogs about furnace repair, furnace inspection, why your furnace isn't working, heating repair, furnace troubleshooting, and when to call for professional furnace service.

Furnace Not Blowing Hot Air Troubleshooting Bessemer City

When temperatures drop in Bessemer City during the cold months, a furnace not blowing hot air becomes an urgent problem — and the good news is that the most common culprit is also the easiest to check. Before you worry about a major breakdown, take a moment to inspect your thermostat settings. Make sure it’s set to “heat” mode rather than “fan” or “cool,” because a simple setting error accounts for a surprising number of service calls. That said, if

Technician servicing an outdoor ductless mini split unit installed on an exterior wall. Best for blogs about mini split repair, mini split installation, ductless system maintenance, outdoor unit troubleshooting, heat pump service, and HVAC technician service content.

Ductless Mini Split Installation Dallas NC: Complete Guide

If you’re wondering whether ductless mini split installation in Dallas NC is the right move for your home, you’re asking a smart question. In a climate where one-zone comfort upgrades can solve a lot of problems, these systems shine without tearing into existing ductwork. We’ve helped many Dallas homeowners decide if a mini split makes sense for sunrooms, bonus rooms, garages, and older homes where adding ducts just isn’t practical. Because these systems mount directly on the wall and connect

Couple sitting on a couch while using a remote to control a wall-mounted mini split air conditioner. Best for blogs about ductless mini splits, mini split operation, home cooling, and zoned comfort.

Air Conditioner Not Cooling? Common Causes and When to Call

When your air conditioner is not cooling properly, the most common culprit we encounter is a dirty or clogged air filter restricting airflow — something you can check in under a minute by opening your return vent and pulling out the filter to see if light passes through. That said, we also regularly find low refrigerant from a leak, a failing compressor, frozen evaporator coils, or a faulty thermostat during our service calls, and those issues require a licensed technician

Close-up of a blue gas burner flame used for heating inside a gas-powered appliance or furnace system. Best for blogs about furnace flames, what a healthy furnace flame looks like, blue flame vs yellow flame, gas burner combustion basics, and furnace safety warnings.

Solar Powered AC: How It Works and What to Consider

If you’ve been watching your summer electric bills climb every year and wondering whether a solar powered AC system could cut your cooling costs without sacrificing comfort, you’re thinking along the right lines. Solar air conditioning pairs renewable energy with the largest electricity draw in most homes. Recent improvements have made the technology far more practical for homeowners across North Carolina. That said, solar AC isn’t a one-size-fits-all solution. The upfront investment, your roof’s sun exposure, your home’s existing ductwork,

Two outdoor heat pump condenser units installed along the exterior wall of a home. Best for blogs about heat pump installation, heat pump vs AC, new HVAC system cost/value, and energy-efficient home cooling systems.

AC vs Heat Pump Cost Comparison: What You Need to Know

When you’re deciding between heating and cooling options for your home, an ac vs heat pump cost comparison can feel overwhelming — especially because the upfront number is only part of the story. In most cases, a heat pump offers better long-term value because it handles both heating and cooling in one system and runs more efficiently than pairing a traditional AC with a furnace. That said, if you already have a reliable furnace and only need cooling, installing a

Homeowner standing near a wall thermostat and looking confused while troubleshooting an indoor comfort issue. Best for blogs about thermostat problems, HVAC not turning on, and cooling or heating issues.

AC Not Cooling Troubleshooting Guide: Diagnose Your System

The first step in any AC not cooling troubleshooting guide is to check your thermostat settings. Many times, the unit is simply set to “on” instead of “auto,” or the temperature target is too high. Once you’ve confirmed the thermostat is calling for cooling and the temperature is set below the current room temp, it’s time to look at the air filter. A clogged filter restricts airflow so severely that the system can’t move enough cold air into your home.

Technician servicing the internal components of a wall-mounted boiler or heating unit with the front cover removed. Best for blogs about furnace repair, furnace maintenance, heating system diagnostics, why your furnace is not working, furnace inspection, and heating service calls.

Furnace Repair Crowders Mountain | Licensed Service

Many homeowners near Crowders Mountain assume their furnace will simply power through the winter without much thought. Even the most reliable systems eventually show signs of wear that demand professional attention. Whether you’re hearing unfamiliar grinding noises from the basement, noticing uneven heating throughout your home, or watching your energy bills climb without explanation, these symptoms often point to underlying issues that won’t resolve on their own. That’s where expert furnace repair Crowders Mountain becomes essential — because a small

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