21-Point HVAC Inspection - Welzig Heating, Air, Plumbing & Electric

Comprehensive Heating and Cooling Inspections for Year-Round Comfort

A well-maintained HVAC system runs more efficiently, lasts longer, and keeps your home safer and more comfortable. Welzig Heating, Air, Plumbing & Electric provides a detailed 21-point inspection for both heating and cooling systems, giving homeowners peace of mind that every major component is checked, tested, and performing as it should. Our certified technicians use advanced tools and expert knowledge to evaluate system health, identify developing issues, and help prevent unexpected breakdowns.

21-Point Heating Inspection

During our heating inspection, we carefully evaluate your system from top to bottom. We begin by inspecting the filter and thermostat before examining electrical components and heat exchangers. The flame sensor is serviced for reliable ignition, and we assess the flue, combustion air, and drafting to ensure proper ventilation. Gas pressure, ignition performance, blower operation, and inducer performance are all tested to verify safe and efficient combustion.

We then inspect the pressure switch, analyze carbon monoxide levels both in the flue and in the supply, and measure temperature differences across the system. Our technicians monitor the full heating cycle, check fuses and safety controls, and clear condensation ports to ensure your system is running smoothly and safely through every stage of operation.

21-Point Cooling Inspection

Our cooling inspection provides the same level of detail and care. We begin by inspecting the filter, thermostat, and electrical components, then evaluate the evaporator coil when accessible. The blower motor is tested for proper airflow, and we confirm drainage and clean the EZ trap. Supply and return temperatures are measured, and Delta T is monitored for accurate performance assessment.

We test the dual capacitor, contactor, and line voltage to confirm reliable power delivery. The compressor’s amp draw, megohm readings, and general performance are checked to ensure system longevity. Outdoor components—including the condenser fan motor, disconnect, and circuit breaker—are inspected for safety. We rinse the condenser coil, inspect the blower wheel, and examine the lineset to confirm that your cooling system is clean, efficient, and ready for the warmer months.

Why Choose a 21-Point Inspection?

Welzig’s comprehensive inspection goes far beyond a quick tune-up. By checking every critical component in both heating and cooling systems, we help prevent costly repairs, improve energy efficiency, and ensure your home stays safe from risks like poor combustion or electrical failure. Homeowners gain confidence knowing their system has been evaluated by trained professionals who prioritize reliability and performance.

Clare

Our 23-year-old A/C system ran out of “borrowed time” and became too difficult to continue maintaining. With great advice from Casey Welzig,, we replaced the old system with a Bryant Evolution A/C system. Max Loustaunau and Seth Bernhardt did an excellent job with removing the old system and installing the new one. Both of them are great to work with — very professional and very personable. We are really amazed at how much better the new system works!

Chris

Bob came out to look at our swamp cooler and was remarkably helpful and professional. Not only did he give me a knowledgeable diagnosis, but he also taught me a lot in the process. We’ll be calling him for all future needs with our cooling system.

Jim

Dave Kaplan-Gomez and James Miltersen installed my new Tankless Water Heater. Both were polite and professional. Care was taken not to damage anything in my house which I really appreciated. I use Welzig for all my HVAC needs and highly recommend them.