Empire Comfort Systems R9901 Fan Limit Switch FBB5

Product Description

The EMPIRE COMFORT SYSTEMS R9901 is a genuine OEM replacement fan limit switch designed for use with FBB5 series blowers. The fan limit switch controls blower motor activation based on heat exchanger temperature, preventing the blower from running before the system reaches proper operating temperature and shutting it off after the heat exchanger cools down. It also serves as a high-limit safety cutout, shutting off the burner if temperatures exceed a safe threshold. This part is manufactured to original factory specifications and is installed by licensed HVAC technicians during routine maintenance or component failure service.

The R9901 is used in Empire Comfort Systems heating equipment fitted with FBB5 blower assemblies. It is suited for residential heating applications where the original fan limit switch has failed, drifted out of calibration, or been damaged. Technicians replacing this component as part of a blower troubleshooting or no-heat service call will find it a direct OEM-style fit for the applicable equipment.

Key Features

• Genuine Empire Comfort Systems OEM replacement part
• Controls blower motor activation based on heat exchanger temperature
• Integrated high-limit safety function shuts off burner on over-temperature condition
• Copper construction for reliable thermal conductivity and durability
• Direct replacement for failed or out-of-calibration fan limit switches

Compatibility

Designed as a direct OEM replacement for Empire Comfort Systems equipment using FBB5 blower assemblies, as specified by the manufacturer for part number R9901.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect all power to the unit before removing the existing fan limit switch. Refer to the unit wiring diagram before disconnecting leads, and verify the replacement switch is properly seated and secured before restoring power. Work should comply with applicable local mechanical and electrical codes.