Red Flags During Home Inspections: What HVAC Issues Could Cost You Thousands

Whether you are buying a home or selling one in the Moses Lake, Ephrata, Othello, or Soap Lake areas, the HVAC system represents one of the largest potential expenses you will encounter during the inspection process. A home inspection that uncovers serious heating or air conditioning problems can derail a sale, reduce property value, or leave new homeowners facing unexpected repair bills that climb into the thousands. At Basin Service, we have been serving the Basin since 1977, and in that time, we have seen virtually every HVAC problem that can surface during an inspection. Understanding what to look for can save you significant money and stress.

Aging Equipment and End-of-Life Systems

One of the most common red flags inspectors note is the age of the furnace and air conditioner. Most residential HVAC systems have a functional lifespan of 15 to 20 years, depending on maintenance history and installation quality. According to the U.S. Department of Energy, heating and cooling account for roughly 48 percent of all energy use in the average American home. When equipment nears the end of its life, efficiency drops dramatically, meaning homeowners pay more every month just to maintain basic comfort. An inspector who flags an aging system is signaling a potential replacement cost that can easily reach several thousand dollars.

Beyond simple age, inspectors look for visible signs of deterioration. Rust and corrosion on a furnace heat exchanger, excessive dust buildup on evaporator coils, and worn blower motors all suggest a system that has been neglected or is failing. These conditions do not just affect comfort. A cracked heat exchanger, for instance, can allow carbon monoxide to seep into living spaces, creating a serious safety hazard. Our technicians at Basin Service are trained to identify these conditions during pre-sale evaluations and can provide detailed assessments that help buyers and sellers negotiate confidently.

Improper Installation and Code Violations

Not all HVAC problems stem from aging equipment. Improper installation is a surprisingly frequent discovery during home inspections, particularly in homes where previous owners attempted DIY projects or hired unqualified contractors. As a Carrier Factory Authorized Dealer, Basin Service maintains rigorous installation standards, but we regularly encounter systems installed by others that fail to meet building codes or manufacturer specifications.

Common installation red flags include incorrectly sized ductwork, refrigerant lines that are too long or improperly insulated, and furnaces that lack adequate clearance from combustible materials. Electrical connections that do not meet code are another serious concern, and our licensed electricians see these issues frequently. An undersized air conditioner, for example, will run continuously during Washington’s hot summers without adequately cooling the home, driving up electricity costs and accelerating equipment wear. Oversized systems cycle on and off too frequently, causing humidity problems and premature component failure. Either scenario points to an installation that was not properly engineered for the home.

Ductwork Problems That Hide in Plain Sight

Inspectors often discover ductwork issues that homeowners never noticed because the problems exist in crawl spaces, attics, and wall cavities. The Environmental Protection Agency estimates that typical duct systems lose 25 to 40 percent of heating and cooling energy through leaks, holes, and poorly connected segments. During a home inspection, these deficiencies get documented and can become major negotiating points.

Specific ductwork red flags include disconnected sections, visible mold growth, excessive condensation, and duct tape repairs that have deteriorated over time. Flexible ductwork that is kinked or sagging restricts airflow and forces the system to work harder. We recommend having ductwork professionally evaluated whenever a home inspection raises concerns, because addressing these problems early prevents compounding damage to the furnace and air conditioner.

Key HVAC Red Flags Every Buyer Should Watch For

1. Unusual noises from the furnace or air conditioner such as banging, squealing, or grinding that indicate mechanical failure
2. Uneven temperatures throughout the home pointing to ductwork issues, zoning problems, or failing equipment
3. Visible rust or corrosion on furnace components, particularly near the heat exchanger or flue connection
4. Missing or outdated maintenance records suggesting the system has not received regular professional service
5. Thermostat inconsistencies where the set temperature does not match the actual room temperature
6. Evidence of water damage around the air conditioning unit or furnace that may signal condensate drainage failures

Protecting Your Investment Before and After the Inspection

If you are preparing to buy or sell a home in the Moses Lake, Ephrata, Othello, or Soap Lake areas, a professional HVAC evaluation from Basin Service gives you clarity that a general home inspection alone cannot provide. Our expertise in furnace repair, heating installation, and air conditioner service means we evaluate systems comprehensively, from electrical connections to refrigerant levels to combustion analysis.

Addressing HVAC red flags before they become emergencies is always less expensive than reactive repairs. We encourage homeowners and prospective buyers to schedule professional inspections that go beyond surface-level observations, ensuring that the system protecting your home and family is safe, efficient, and built to last through every season.