520944 Suburban Transformer 24V AC P-30S, P-40

Fits Suburban P‑30S and P‑40 RV Furnaces

The Suburban 520944 Transformer supplies the 24‑volt AC control voltage required for furnace ignition, safety circuits, and thermostat operation in P‑series furnaces. This transformer steps down line voltage to a stable 24‑volt output, ensuring proper operation of the ignition board, limit circuits, and control wiring.

A failing transformer can cause intermittent ignition, no‑heat conditions, blown fuses, or low‑voltage faults. Replacing it with the OEM 520944 restores correct control‑voltage output and reliable furnace performance.

Key Features

• OEM Suburban 24V AC transformer

• Provides stable control voltage for ignition and safety circuits

• Correct mounting footprint and wiring configuration for P‑series furnaces

• Ensures proper thermostat and control‑board operation

• Direct‑fit replacement for fast, accurate service

When Technicians Replace This Transformer

• Furnace will not start or repeatedly locks out

• No 24‑volt signal to the control board

• Thermostat has power issues or intermittent operation

• Low‑voltage readings or blown low‑voltage fuse

• Transformer is humming loudly, overheating, or visibly damaged

Compatibility

• P‑30S

• P‑40

• Fits OEM Suburban P‑series control housings using the 520944 transformer