Aspen Manufacturing
High-volume replacement coils and air handlers through distribution. When a “universal” coil is in the system, verify TXV versus fixed orifice and the rated airflow — the sizing wing of the board is about exactly this.
What they make
Evaporator coil
Covered in the simulatorThe indoor coil itself — cased or uncased, A, N or slab — often replaced separately from everything else, which is where mismatches are born.
Freeze-ups, restrictions, airflow starvation and mismatched-coil audits are all on the board, and the guided flow’s superheat/subcooling paths read straight through it. Match by capacity and metering device, never by badge.
Start a guided call →Practice: gauges on →Practice: runs but won’t cool →Practice: wrong part, wrong size →A2L start-up guide →
Air handler / fan coil
Covered in the simulatorThe all-electric indoor cabinet: blower, coil, and controls. In multi-family it hides in closets and mechanical rooms; hydronic fan-coil versions swap the coil’s refrigerant for water.
Modeled as the sim’s indoor unit: control power, blower circuits, condensate float, coil airflow. Hydronic (water-coil) versions add loop diagnosis the sim doesn’t model yet.
Start a guided call →Practice: whole system dead →Practice: no air inside →Practice: runs but won’t cool →Practice: acting possessed →Practice: blows fuses →Practice: gauges on →A2L start-up guide →
Tech support
Tech support here is the guided Copilot with your Aspen Manufacturing info already loaded — one question at a time, evidence before parts, and everything you enter rides into the service report.
Model-number decoding here covers residential and multi-family split systems and package units, 5 tons and under — Aspen Manufacturing equipment lives outside that scope, so the manufacturer’s literature leads on model specifics. The Copilot still loads the brand for a guided session.
Start tech support — Aspen Manufacturing loaded →