dn

EXV Communication Error

Description

Communication between the main control board and the electronic expansion valve (EXV) driver has failed.

Appliance Error Codes Details

Error Code
dn
Error Name
EXV Communication Error
Appliance Type
air_conditioner
Brand
Carrier
Severity
medium

Additional Troubleshooting

1. Power cycle the system
2. Check the EXV connector and wiring for damage or looseness
3. Contact service for EXV coil and driver board inspection

Was this helpful?

Loading...

Send Feedback

Found an error or have a suggestion? We respond within 48 hours.

Fact-checking completed

Verified by: Pavel Volkov
Created:
Last updated:
Information verified against official sources

Official Sources

Official Manufacturer Service Manuals

Service manuals and technical documentation from appliance manufacturers

Original equipment manufacturers official documentation

Industry Standards Organizations

International standards for electrical appliances and error codes

International Electrotechnical Commission standards

Visit

Learn More

Dive deeper with our comprehensive developer guides for Appliance Error Codes

Appliance Error Codes: Troubleshooting Guide

Fix your home appliances with our comprehensive troubleshooting guide. Learn to identify error codes...

Pavel Volkov Aug 30, 2025
View all guides

Related Codes

More codes of the same type

DF

Defrost Error

The defrost system is not working properly.

View details →

dH

Home-Bar Door Open Alarm

The home-bar (dispenser) door has been detected as open for one hour or longer.

View details →

dHE

Dryer Heater Error

The drying heater element is malfunctioning in a washer-dryer combo.

View details →

DL

Door Latch Switch Error

The door latch switch is malfunctioning, so the washer cannot confirm the door s...

View details →

DO

Door Open Error

A refrigerator door has been left open or is not closing properly.

View details →

dr

Refrigerator Door Sensor Error

The sensor for the refrigerator door is malfunctioning.

View details →

DR

Drain Timeout

The cycle timed out and the washer automatically drained the water.

View details →

dS

Freezer Door Sensor Error

The sensor for the freezer door is malfunctioning.

View details →
Back to Appliance Error Codes