The Trane FAN1509 is a heavy-duty

Engineered for seamless integration with Belimo globe valves

Inspect for visible burn marks

reliable fix

Aaon R05040 Pressure Switch 321702-401 The Trane FAN1509 is aThe Aaon R05040 Pressure Switch is a high precision low pressure switch engineered specifically for technical HVACR diagnostic and protection services. This OEM replacement part is essential for monitoring refrigerant levels and internal system pressure to prevent costly compressor failure. By detecting low pressure conditions across heating and cooling units, the Aaon R05040 triggers an automatic shutdown to safeguard internal components from