Westinghouse 621931R Blower Relay 250V 20A Spdt

Product Description

The WESTINGHOUSE 621931R is a blower relay designed for split system air conditioners. It switches the blower motor circuit in response to a 24-volt control signal, acting as the interface between the low-voltage thermostat circuit and the line-voltage blower motor. Rated at 250 VAC with a 20-amp load contact and a 10-amp alternate contact rating, this SPDT relay includes both normally open and normally closed contacts. HVAC technicians install this relay as an OEM-style replacement when the original relay fails to energize the blower or causes continuous blower operation.

This relay is used in residential split system air conditioning equipment. It is specifically referenced for the S5BXM split system air conditioner model line. Typical installation involves the relay mounted on the air handler control board or in the blower compartment, where it receives a 24-volt signal from the thermostat or control board to switch the blower motor on and off during cooling and fan-only operation.

Key Features

• SPDT configuration with both normally open and normally closed contacts for flexible circuit wiring
• 250 VAC line-voltage rating handles standard residential blower motor loads
• 20-amp primary contact rating and 10-amp secondary contact rating
• 24 VA coil rating compatible with standard low-voltage thermostat control circuits
• OEM replacement part for S5BXM split system air conditioner applications

Compatibility

Designed as a replacement blower relay for the WESTINGHOUSE S5BXM split system air conditioner.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect and lock out all power to the air handler unit before removing or installing the relay. Verify the coil voltage and contact ratings match the existing circuit requirements before energizing the system. Reference applicable local electrical codes and the equipment service manual for wiring diagram guidance.

Technical Specifications

• Component Type: Relay
• Contact Configuration: SPDT (NO/NC)
• Voltage Rating: 250 VAC
• Current Rating (Primary Contact): 20 amps
• Current Rating (Secondary Contact): 10 amps
• Coil Rating: 24 VA
• Application: Blower relay, split system air conditioner

Standard Information

• Brand: WESTINGHOUSE
• Manufacturer Part Number: 621931R