GE Appliances mini split error code 4

Common causes

• A loose connector between the boards.
• A failed board.

How to fix it yourself

Do the reset and the visual checks, but the underlying repair needs a technician with a meter and the service manual.

1. Reset the system: switch the breaker (or the outdoor disconnect) off, wait a full five minutes so the boards fully discharge, then switch it back on and restart from the remote.
2. With power off, reseat the connectors between the outdoor boards.

Switch off power at the breaker before opening either unit. Capacitors in the outdoor unit hold a charge for several minutes after power is cut.

When to call a technician

Board-level fault.

Which GE Appliances units show 4

This page applies to GE Appliances GE multi-zone ductless (ASH…JCDDA) units. GE Appliances's own documentation lists 4 as "Communication failure between IPM and outdoor PCB", the same definition used across the Haier / GE multi-zone outdoor display it is built on. If your unit shows a code with a different shape (for example a four-character code, or a plain number), it is from a different table; use the lookup with your exact code.

Where GE Appliances shows this code

These numeric codes show on the Service Monitor Board display inside the multi-zone OUTDOOR unit (behind the service panel). The indoor units signal a fault with blinking lamps; the number on the outdoor board is what identifies it. Codes 1 to 27 are outdoor-unit faults and protections, 28 to 41 are temperature sensors (28 to 31 and 40 are zone liquid-pipe sensors, 32 to 36 are zone gas-pipe sensors), and 42 to 45 are pressure switches and limits.

Other GE Appliances codes

Same part of the system as 4:

All GE Appliances error codes

4 on other brands

The same characters do not always mean the same thing. Check the brand on your unit.

• Haier 4 Communication failure between IPM and outdoor PCB