York mini split error code oE

Common causes

• Any outdoor-side protection or fault.

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. Look at the outdoor unit: clear leaves, cottonwood fluff, snow or ice from the coil and make sure the fan can spin freely and nothing is stacked against the cabinet.
3. With power off, open the outdoor service panel and look for a status LED blink count or a code on the outdoor board; the service manual decodes it.

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

Outdoor board diagnosis is a technician job.

Which York units show oE

This page applies to York M-Series inverter-driven (DHM / DHP) and York multi-zone (DHM…CMB) units. York's own documentation lists oE as "Outdoor unit fault (see outdoor board)", the same definition used across the Gree platform 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 York shows this code

The code shows on the indoor unit's display in place of the temperature. If the display is off, press the Light button on the remote. Some models also count out the code as indicator blinks. E codes are system protections and faults, F codes are mostly sensor faults, H codes are outdoor and compressor protections, U codes are motor and valve faults, and P codes are power-supply faults.

Other York codes

Same part of the system as oE:

All York error codes

oE on other brands

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

• Blueridge oE Outdoor unit fault (see outdoor board)