You’ve probably been told—maybe even more than once—that scheduling regular inspections for your HVAC and plumbing systems is important. But what does that actually look like? Is it just a quick check of your thermostat and water pressure, or is there more to it?
If you’re not sure what happens during a professional inspection—or what to expect when a technician arrives at your door—this guide will walk you through it, step by step. Understanding the process not only helps you prepare, but also ensures you know what quality service really looks like.
Before the Inspection: What You Should Know
Most HVAC and plumbing inspections are scheduled as preventive maintenance, not in response to a specific issue. These visits are typically done once or twice per year—often in the spring or fall—before seasonal temperature extremes kick in.
You don’t need to do much ahead of time, but clearing access to your equipment—like the furnace, water heater, and outdoor AC unit—can speed things up. Some homeowners also jot down a few questions or concerns they’ve noticed, such as strange noises or fluctuating water pressure. These details can be helpful to the technician.
Step 1: HVAC System Evaluation
When the technician arrives, they’ll usually begin with the HVAC portion of the inspection. Here’s what that typically includes:
1.1 Visual Inspection of Equipment
They’ll check your:
This step helps identify signs of wear, damage, corrosion, or any disconnected or poorly installed components.
1.2 Filter Check and Replacement
Dirty or clogged filters restrict airflow, reduce efficiency, and can stress your HVAC system. Your technician will check the current filter and replace it if needed (often with your approval).
1.3 Electrical and Safety Checks
The technician will inspect wiring, relays, fuses, and safety controls. They’ll also test key components like the blower motor, capacitor, and ignitor to make sure everything is operating within the proper range.
1.4 Airflow and System Calibration
Using specialized tools, they’ll measure airflow through the system to ensure even distribution. If your system has zoning features, dampers will also be tested.
Thermostat calibration is another critical step—ensuring that what you set is what the system actually delivers.
1.5 Refrigerant Check (for AC/Heat Pump)
If it’s a cooling system inspection, the technician will check refrigerant levels and pressures to detect leaks or imbalances. Low refrigerant can lead to poor performance or even damage to the compressor.
1.6 Efficiency and Performance Testing
Before wrapping up the HVAC portion, the technician may run a full heating or cooling cycle to confirm everything works properly and safely.
Step 2: Plumbing System Evaluation
Once the HVAC portion is complete, the technician will begin inspecting your plumbing system. While some companies handle both HVAC and plumbing in one visit, in other cases, this portion may be done by a licensed plumber on a separate appointment.
2.1 Water Heater Inspection
This includes:
Whether you have a tank or tankless water heater, it’s essential that this component operates efficiently and safely.
2.2 Leak Detection and Pipe Inspection
Technicians will examine exposed piping under sinks, around toilets, and in basements or utility rooms. They’ll look for signs of wear, corrosion, or minor leaks that could escalate.
Moisture meters or infrared cameras may be used for early detection in hard-to-see places.
2.3 Water Pressure Testing
Water pressure that's too high can stress pipes and fixtures. Pressure that's too low might indicate hidden blockages or failing supply lines. An optimal range is typically between 40–60 psi.
If your pressure is outside this range, the technician will investigate the likely cause and recommend a solution.
2.4 Drainage and Fixture Testing
This includes running water through sinks, tubs, and toilets to check for proper flow, drainage speed, and venting. Any signs of slow drains, backups, or gurgling sounds are noted for further investigation.
2.5 Shutoff Valve Check
Valves near fixtures and your main water shutoff should be easy to turn and fully functional in an emergency. Technicians will test these for wear and note any that may need replacement.
Step 3: Reporting and Recommendations
Once both systems have been evaluated, the technician will go over their findings. This usually includes:
Don’t be afraid to ask questions here. A quality HVAC contractor or plumber will explain technical issues in plain language and help you prioritize what’s urgent versus what can wait.
Professionals like those at Nardco Heating & Air Conditioning often leave you with a report or summary sheet, giving you a clear picture of your systems' health and any next steps.
Why These Inspections Matter
You might be wondering: do I really need this every year? The answer is a confident yes.
Here’s why these inspections are more than just a “nice-to-have”:
Neglecting these inspections can result in higher costs, more frequent breakdowns, and lower home value in the long run.
Final Thought: One Appointment, Many Benefits
Scheduling an annual HVAC and plumbing inspection might not be the most exciting event on your calendar—but it’s one of the most valuable. In just a couple of hours, you get peace of mind, lower operating costs, and the confidence that your home is ready for the season ahead.
When it’s time to schedule your next inspection, work with a trusted team like Nardco Heating & Air Conditioning—professionals who treat your home like their own and know how to spot the little things before they become big problems.
