Rooftop Unit Service in Buffalo, NY

A package unit packs several systems into one cabinet, so a symptom on the ground can have a source in any of them. The common culprits are below.

• Belts, bearings and blower motors: squealing, a hot-rubber smell or weak airflow at the diffusers.
• Contactors and capacitors: the compressor or condenser fan will not start.
• Economizer dampers: stuck positions that let cold outdoor air in or starve the space of fresh air.
• Gas heat section: a failed ignitor, a dirty flame sensor, a tripped limit switch or a cracked heat exchanger.
• Evaporator coil and drain: ice on the coil, or water dripping into a ceiling.
• Refrigerant circuit: low charge from a slow leak.

Heating season here runs roughly September 19 to May 31, and the area sees about 124 nights a year at or below 32°F, according to NOAA normals as reported by MyWild.Report. A rooftop unit works through all of it, then switches to cooling with little downtime for service.

Snow drifts bury intake louvers and flue terminations. Condensate lines freeze. Flashing around the roof curb can leak when ice dams form, and water that runs into the curb can reach the ceiling below.

Snow totals differ sharply across the county. ABC7 New York listed 36.6 inches at the Buffalo airport after the November 2022 storm, against 77.3 in Hamburg and 80 in Orchard Park. A unit in the Southtowns can sit under a far deeper drift than one near the airport.

1. 1Read the nameplate. Model, serial number, manufacture date and whether heat is gas or electric. Age tells us a lot before we open a panel.
2. 2Check the access. How the roof is reached and whether the surface is safe to work on, before any gear goes up.
3. 3Power and controls. Disconnect, thermostat or controller wiring and the safety circuit.
4. 4Cooling side. Contactor, capacitors, fan, compressor draw and refrigerant readings.
5. 5Heat side and airflow. Ignition, flame signal, heat exchanger, belts, filters and economizer.
6. 6Report back. We show you the fault, explain the options in plain language and quote before work starts.

We tell you when a repair is not worth it. A reviewer who was quoted about $2,000 elsewhere came to us and paid less than half, and we do not push new equipment before testing the old.

The Department of Energy says rooftop units past 15 years often give reduced service and waste substantial energy and money, and that owners tend to wait for them to fail. A planned swap on your calendar beats a forced one in January. For a fault on a younger unit, start with commercial HVAC repair.

A swap is more than lifting a box. The new cabinet has to fit the roof curb or an adapter, the gas line and electrical connections must match, and the ductwork below has to suit the new airflow. We size from the building’s load, not only from the old nameplate.

Getting a unit onto a roof can take a lift, and permits apply. Inside Buffalo city limits, Permit & Inspection Services handles heating permits, and Buffalo Code Chapter 175 allows double fees when work starts before the permit is issued. We cover these items before a quote, not after. Our blog has a planning guide for rooftop unit replacement.

We publish no prices. Cost moves with the unit’s size, the heat type, the curb work, the lift and the electrical and gas changes, and we quote it before work begins.

• Capacity and heat type: tonnage, and gas or electric heat, set the size of the unit and the connections it needs.
• Curb and roof: a matching curb is a like-for-like swap, while a different footprint needs an adapter curb or roof work.
• Lift and access: a crane or lift needs somewhere to set up, and snow on the roof adds time.
• Gas, electrical and controls: a resized gas line, a new disconnect or a new thermostat each add labor.
• Age of the old unit: it decides whether repair is sound or money into a failing cabinet.

Which licensing and code rules apply to a rooftop swap?

Erie County Consumer Protection says New York has no statewide HVAC contractor license, so the license that applies depends on your municipality. Cheektowaga licenses HVAC contractors, the Town and City of Tonawanda and the Village of Kenmore require contractor licensing, and Amherst licenses home improvement contractors. Confirm with your municipality, and ask who pulls the permit. The NYS energy code calls for equipment selected under ACCA Manual S from loads figured by Manual J or another approved method, which is why we size from the building and not the old nameplate.

• Change filters on a calendar, and write the date on the cabinet.
• Clear snow and debris from the intake and exhaust after each storm, from a safe position.
• Report squeals, ice or short cycling early, before a belt or motor fails.
• Book commercial HVAC maintenance in spring and fall.

Refrigerant work requires certification under Section 608 of the Clean Air Act, according to the EPA, so leave leak repairs to a qualified technician.