Only trained and qualified personnel should design, install, repair and service HVAC systems and equipment. All national standards and safety codes

must be followed when designing, installing, repairing and servicing HVAC systems and equipment. It is the responsibility of the Dealer to ensure local

codes, standards, and ordinances are met.

© Carrier Corporation 2023

1

TECHNICAL INFORMATION

Products Affected

FJ4DNXA18 Fan Coils

Situation

The 018 fan coils will be redesigned to be like the rest of the product fan coil family. Starting week 24

of 2023 the 018 fan coils will include a white wire in the harness between “W” and motor tap 4 which

will call for the fan to operate without a call for “G” from the thermostat. Most thermostats energize “G”

Design through week 23, 2023 Design after week 23, 2023

Quality and Continuous Improvement