A summer inspection has one clear advantage: the air conditioning is running under the conditions it was built for. Many inspectors avoid running a cooling system on a cold day, but in July they can watch it work hard. Even so, a general home inspection is a visual, non-invasive look, and understanding its scope helps you decide whether you need more information before your inspection period ends.
What a general inspector typically checks
Most home inspectors follow a published standard of practice that defines what they must look at and what they may skip. For cooling, a typical inspection includes some combination of the following:
- Operating the system with the normal thermostat controls and noting whether it responds and cools
- Comparing the temperature of the air entering the system with the air coming out of the vents, a quick check of whether it is cooling effectively
- Looking at the outdoor unit for damage, bent fins, a level pad, adequate clearance and an electrical disconnect
- Checking the refrigerant lines for missing insulation or oily residue, which can point to a leak
- Looking at the indoor unit, where accessible, for rust, water in the drain pan and a working condensate drain
- Noting the filter’s condition, visible ductwork and the age of the equipment from its label
What it usually does not cover
A general inspector usually does not attach gauges to measure refrigerant charge, open sealed components, test ducts for leakage or calculate whether the system is the right size for the house. Inspectors also cannot predict how long a working system will last. Their reports describe condition on the day of the inspection and flag anything that deserves a closer look from a specialist.
When to bring in an HVAC technician
Consider a separate evaluation by a licensed HVAC contractor during your inspection period if:
- The equipment is older or the seller has no service records
- The inspector noted weak cooling, unusual noise, short cycling or signs of a refrigerant leak
- The indoor and outdoor units appear to be different ages, which can mean only one part was replaced
- Some rooms are much warmer than others
- Water stains, rust or mold appear around the indoor unit or ducts
Ask the technician to explain the findings in plain terms, to separate routine maintenance from actual repairs and to tell you whether the refrigerant the system uses affects future service. Request a written summary.
Turning findings into decisions
An older system that cools well is not a defect. It is a budgeting item. A system with a clear problem is a different matter, and it may lead to a repair request, a credit or a closer look at whether the home still fits your plans. Your agent can help you decide which approach makes sense within your contract’s deadlines. Whatever you decide, keep the inspection report and the technician’s notes with your home records, since they will help whoever services the system after you move in.
How to Prepare for the Cooling Portion of Your Inspection
A few simple steps before inspection day help you get the most useful information from the inspector’s time with the system.
- Ask the seller for records. Service invoices, warranty documents and the installation date help the inspector and any technician put their findings in context.
- Request that the system be running. Ask your agent to confirm the power is on and the system is set to cool before the inspector arrives, so it has been operating normally.
- Attend if you can. Being present lets you ask questions while the inspector is at the equipment and learn where the filter, thermostat and shutoffs are.
- Walk the rooms yourself. While the system runs, notice whether some rooms feel warmer or more humid than others and mention it to the inspector.
- Check the thermostat. Ask whether it is a programmable or smart model, and whether its settings and accounts will be transferred or reset.
Reading the Cooling Section of the Report
Inspection reports often use standard phrases. Here is what some of them generally mean.
- “Functional at time of inspection”: The system responded to the controls and appeared to cool. It does not predict future performance.
- “Near or beyond typical service life”: The equipment is older. It may keep working for some time, but budgeting for replacement is wise.
- “Recommend evaluation by a qualified HVAC contractor”: The inspector saw something that warrants a specialist’s opinion. Schedule that evaluation within your inspection period.
- “Maintenance recommended”: Routine service, such as cleaning or a filter change, is due. This is usually not a major concern.
- “Evidence of moisture” or “corrosion noted”: Water or rust around the indoor unit or drain pan may point to a drainage issue worth looking into.
Common Mistakes Buyers Make With HVAC Findings
- Treating age as a defect. An older system that works properly is a planning item, not necessarily a reason to renegotiate.
- Waiting to schedule a technician. HVAC contractors are busy in summer. Book as soon as the inspection report arrives.
- Relying on the seller’s word alone. Ask for documentation of any recent repairs or replacements.
- Forgetting the ducts. Leaky or poorly insulated ducts in a hot attic or crawl space can affect comfort. Ask the technician to look at accessible ductwork.
Questions Buyers Ask About Summer HVAC Inspections
Can a home warranty cover the air conditioner?
Some home warranty plans include heating and cooling systems, with limits and exclusions. Read the contract carefully before relying on one, and know that it is not the same as homeowners insurance.
Should I ask the seller to replace an old system?
That depends on the system’s condition, the market and your contract. Your agent can help you decide whether to ask for a repair, a credit or nothing at all.
What temperature difference should I expect between supply and return air?
Inspectors use this comparison as a general indicator, and what counts as normal can vary with conditions. If the inspector flags the reading, a technician can explain what it means for your specific system.
Is a heat pump inspected the same way as an air conditioner?
In cooling mode, a heat pump works much like an air conditioner, so the summer checks are similar. Its heating function may not be fully tested in hot weather, so ask the inspector what was and was not evaluated, and consider asking a technician to review both modes.
