Frigidaire (HVAC)
Nortek Global HVAC badge (a Rheem company since late 2024) — the same residential platforms also wear Maytag and Gibson nameplates, with Westinghouse on older units and iQ Drive inverter systems in the installed base. Formerly the Nordyne family, a name you’ll still find on data plates.
The family: Frigidaire, Maytag and Gibson badges on shared residential platforms (older units also wear Westinghouse), plus Miller and Intertherm in manufactured housing. Formerly Nordyne, then Madison Industries — part of Rheem Manufacturing since late 2024.
Same family: Miller
What they make
Split system A/C (straight cool)
Covered in the simulatorOutdoor condenser plus an indoor furnace-and-coil or air handler — the most common machine in single-family homes and garden-style multi-family.
The whole sim is built on this machine: every wing of the board and the guided no-cool flow apply directly.
Start a guided call →Practice: whole system dead →Practice: outdoor unit dead →Practice: runs but won’t cool →Practice: no air inside →Practice: acting possessed →Practice: blows fuses →Practice: gauges on →Practice: wrong part, wrong size →A2L start-up guide →
Heat pump (split)
Lessons carry overA split system that also heats: one reversing valve decides which coil condenses. Everything a straight-cool split has, plus the O (or, on some brands, B) circuit and defrost.
The HEAT PUMP wing of the board works the reversing valve; the guided flow routes heat pumps to escalation until its playbook ships. The electrical side transfers one-for-one.
Open in the Copilot (reference) →Practice: heat pump →Practice: whole system dead →Practice: outdoor unit dead →Practice: runs but won’t cool →Practice: no air inside →Practice: acting possessed →Practice: blows fuses →Practice: gauges on →Practice: wrong part, wrong size →A2L start-up guide →
Gas furnace
Covered in the simulatorThe indoor half of most split systems outside the Sun Belt: burners and heat exchanger below, the A-coil above, the 24V control system inside.
The control side — door switch, transformer, board, blower, low-voltage fuse — is fully modeled as the sim’s indoor cabinet, and the guided flow applies on cooling complaints. Combustion-side diagnostics are on the roadmap.
Start a guided call →Practice: whole system dead →Practice: no air inside →Practice: acting possessed →Practice: blows fuses →
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 →
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 →
Package unit
Lessons carry overThe whole system in one outdoor cabinet — on a pad beside the house or on the roof. Gas/electric, straight cool, or heat pump.
Same parts, one cabinet: contactors, dual-run caps, PSC/ECM motors and the refrigerant circuit fail exactly like the board’s scenarios. The guided flow’s split-system routing doesn’t fit a single cabinet, so it escalates package units by design.
Open in the Copilot (reference) →Practice: runs but won’t cool →Practice: blows fuses →Practice: gauges on →
Tech support
Tech support here is the guided Copilot with your Frigidaire (HVAC) info already loaded — one question at a time, evidence before parts, and everything you enter rides into the service report.
Opens the guided Copilot with Frigidaire (HVAC) already on the equipment card.
Reading Frigidaire (HVAC) model numbers
Modern platforms use long letter blocks with the size code buried mid-string: FSA1BF4M1SN36K carries 36 = 3 tons. Older Nordyne-era units read simpler (FS3BD-036K). Manufactured-housing equipment is its own grammar: M1MB-077 is a gas furnace at 77,000 BTU INPUT; E7EB-015H is an electric furnace at 15 kW — neither digit block is a cooling tonnage.
FS3BD-036K— Nordyne-era split A/C, 3 tons (036).E7EB-015H— Intertherm MH electric furnace, 15 kW heat — not a cooling size.
Thirty years of these units
The same platforms wore Nordyne, then Frigidaire/Maytag/Westinghouse/Gibson badges, now under Rheem ownership. In mobile-home parks the Miller/Intertherm M1 and E-series cabinets span three decades and are still the default replacement.
MH-approved package/split pairings carry their own listings — match by the listing, not just the size code.
Dating a unit from the serial
Serial date formats changed across the Nordyne→Nortek years — date these from the manufacturer’s table, not memory. Confirm era from the data plate’s refrigerant and the family table.
Varies by vintage — use the manufacturer’s table
Need the wiring? The practice board’s ladder diagram is live and interactive — the same circuit these units share, with a meter on it. Open the board →