6 min read · HVAC Maintenance
Skipping a seasonal startup check is one of the fastest ways to turn a routine maintenance item into an emergency service call. Run through these steps each spring and fall and your systems will be ready before the season demands it.
Why Seasonal Startups Matter for Commercial Buildings
Commercial HVAC systems in Greater Boston take a beating from weather extremes. Cold winters stress heat exchangers, refrigerant lines, and controls. Hot, humid summers push cooling equipment hard. The shoulder seasons — spring and fall — are your window to inspect, clean, and commission before the load arrives. A problem caught in April costs less to fix than one discovered in August when every tech in the North Shore is already dispatched.
Spring Startup Checklist (Cooling Season Prep)
Check refrigerant charge and inspect for leaks. Clean condenser coils — accumulated debris from winter cuts efficiency and increases head pressure. Inspect fan blades, belts, and bearings on air handlers and rooftop units. Verify economizer operation and damper actuators move freely. Test controls and thermostat setpoints. Confirm drain pans and condensate lines are clear. Document unit nameplate data and note any equipment showing wear. Log filter condition and swap if needed. Record supply and return air temperatures at startup to establish a baseline.
Fall Startup Checklist (Heating Season Prep)
Inspect heat exchangers and burner assemblies before first heat. Check flue connections and draft hoods for corrosion or blockage. Test limit controls and safeties. Verify gas pressure at the manifold is within equipment specs. Lubricate all moving parts: fan motors, belt drives, and linkages. Inspect and clean heat pump reversing valves if applicable. Test low-ambient lockout controls. Flush and pressure-test hydronic loops where present. Check expansion tanks and make-up water feeds. Replace filters and document the date.
Rooftop Unit Specifics for North Shore Properties
Rooftop units take the full force of coastal New England weather. Salt air accelerates coil and cabinet corrosion — inspect more frequently than the manufacturer's inland schedule. Make sure curb flashings and unit bases are sealed tight before winter. Water intrusion into an RTU cabinet causes control-board failures that are expensive and slow to source. If any unit is more than fifteen years old, document its condition during the fall startup and budget accordingly.
When to Call a Mechanical Contractor
A seasonal startup can be part of a planned maintenance agreement or a one-time service visit. If your inspection turns up refrigerant leaks, heat exchanger cracks, failed actuators, or controls that won't sequence correctly, those are jobs for a licensed mechanical contractor. Norkum covers preventive maintenance for commercial properties across the North Shore and Greater Boston, based in Saugus, MA. We're licensed and insured in Massachusetts.
Frequently asked questions
How often should commercial HVAC systems be serviced in Massachusetts?
Most commercial systems benefit from at least two inspections per year — spring and fall — plus filter replacements on a schedule based on occupancy and environment. Coastal properties near the North Shore may need more frequent coil cleaning due to salt air.
What is included in a commercial HVAC startup?
A startup covers equipment inspection, coil cleaning, refrigerant charge check, control verification, filter swap, safety testing, and documentation. The scope varies by system type — rooftop units, air handlers, heat pumps, and hydronic systems each have their own checklist items.
Can Norkum handle seasonal maintenance for a portfolio of commercial properties?
Yes. We set up planned maintenance programs for property managers and building owners across the North Shore and Greater Boston. Contact us to discuss your portfolio and we'll build a schedule that works.
