mypros+
Error code reference

Samsung Air Conditioner Error Code E223

Outdoor COND MID temperature sensor open/short error.

Samsung codesSamsung air conditioner codes

Outdoor COND MID temperature sensor open/short error.

First step from the service manual

Check if the outdoor COND MID sensor connector is separated from PCB; if so, reconnect and restart.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for E223.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What E223 means on a Samsung air conditioner

Error code E223 on a Samsung air conditioner indicates a fault detected in the outdoor unit's condenser mid-point temperature sensor, also referred to as the COND MID sensor. This sensor monitors the temperature at an intermediate point along the condenser coil, providing the control board with real-time thermal data used to regulate refrigerant flow, compressor operation, and fan speed. When the PCB detects a signal from this sensor that falls outside the expected range, it classifies the fault as either an open circuit (no signal, indicating a broken wire or completely failed sensor) or a short circuit (a signal reading that is implausibly low, indicating a sensor or wiring shorted to ground or another conductor).

The most frequent trigger for E223 is a physical disconnection between the COND MID sensor connector and the outdoor unit PCB. Vibration during normal operation, improper handling during previous service, or connector corrosion can all cause the plug to separate or make intermittent contact. Beyond connector issues, the thermistor element inside the sensor itself can fail due to thermal stress or age, causing its resistance to drift completely out of range. Wiring harness damage from pests, weathering, or pinching during panel reassembly can also produce the open or short condition the board is detecting.

Diagnosing E223 begins with a physical inspection of the sensor connector at the PCB to confirm it is fully seated. If the connector is secure, the next step is measuring the sensor's resistance with a multimeter and comparing it against the temperature-resistance curve specified for that sensor. A reading of zero ohms suggests a short, while an open-loop (infinite resistance) reading confirms a broken thermistor or wire. Replacing the sensor or repairing the harness resolves most cases.

Source: manufacturer service documentation.

Common causes of E223

  1. 01

    Disconnected sensor connector at PCB

    Wiring / connection

    The COND MID sensor plug may have come loose from the outdoor unit control board due to vibration or previous service work. Visually inspect the connector and firmly reseat it, then restart the unit to see if the error clears.

  2. 02

    Failed COND MID thermistor

    Part replacement

    The thermistor element inside the sensor can fail open or short due to age or thermal stress, producing a resistance reading that is either infinite or near zero. Measuring resistance across the sensor terminals will confirm this fault.

  3. 03

    Damaged wiring harness

    Part replacement

    Wires running from the sensor to the PCB can be pinched, corroded, or chewed by pests, creating an open or short in the circuit. Inspect the full length of the harness for visible damage or areas where insulation has worn through.

  4. 04

    Corroded or oxidized connector pins

    Wiring / connection

    Even when physically connected, pin corrosion inside the connector can create high resistance that mimics an open circuit. Inspect the connector pins for green or white oxidation and clean or replace the connector as needed.

  5. 05

    Faulty outdoor unit PCB

    Part replacement

    If the sensor and wiring both test within normal resistance ranges, the outdoor PCB input circuit for this sensor may have failed. This is the least common cause and should only be considered after sensor and wiring are confirmed good.

See the test procedure for each cause

Frequently asked questions about E223

What does E223 mean on a Samsung air conditioner?
E223 indicates an open or short circuit fault in the outdoor condenser mid-point temperature sensor (COND MID sensor). The control board is receiving a signal from that sensor that is either missing entirely or outside the acceptable range. The unit will typically stop operating normally until the fault is resolved. The issue can originate at the connector, the sensor itself, or the wiring harness.
Can I fix E223 myself or do I need a technician?
If the sensor connector has simply come loose from the outdoor PCB, you can reconnect it yourself after powering the unit off at the breaker. However, if the sensor has failed or the wiring is damaged, a technician with a multimeter and access to the correct replacement sensor will be needed. Working inside the outdoor unit involves live voltage risks, so any work beyond reconnecting an obviously loose plug should be left to a qualified technician.
Is it safe to run my air conditioner while E223 is active?
It is not recommended to continue operating the unit while E223 is active. The COND MID sensor provides temperature data that the control board uses to protect the condenser and compressor from overheating. Without reliable readings from this sensor, the system cannot make informed decisions about protecting those components, which could lead to compressor damage over time.
Will resetting the air conditioner clear the E223 error?
A reset may temporarily clear the error code, but if the underlying fault with the sensor or wiring is still present, the E223 code will return once the unit restarts and re-checks the sensor signal. A reset is useful only as a first step after physically reconnecting a loose sensor connector. If the code comes back after a reset, a full diagnostic of the sensor and harness is required.
How much does it cost to repair a Samsung air conditioner E223 error?
Repair costs vary depending on the root cause. If only the connector needs to be reseated, there may be no parts cost, though a service call fee typically applies and can range from $75 to $150 or more. Replacing the COND MID thermistor sensor usually involves parts costs in the range of $20 to $80 for the sensor itself, plus labor. If the outdoor PCB requires replacement, total costs can rise significantly higher, often ranging from $300 to $600 or more depending on the model.

Related Samsung air conditioner codes

All Samsung air conditioner codes
View all 572 Samsung air conditioner codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass