mypros+
Error code reference

Daewoo Air Conditioner Error Code Room Sensor open/short

Room temperature sensor is open or shorted; unit continues working with room temperature fixed at 32°C in…

Daewoo codesDaewoo air conditioner codes

Room temperature sensor is open or shorted; unit continues working with room temperature fixed at 32°C in cooling mode.

First step from the service manual

Check room sensor thermistor connections and resistance.

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 Room Sensor open/short.

  • 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 Room Sensor open/short means on a Daewoo air conditioner

The Room Sensor open/short error on a Daewoo air conditioner indicates that the control board has detected a fault in the room temperature thermistor circuit. This thermistor is a negative temperature coefficient (NTC) resistor that continuously reports ambient room temperature to the control board. When the board reads a resistance value that falls outside the expected range, either extremely high resistance (open circuit) or near-zero resistance (short circuit), it flags this error. An open fault typically means the sensor circuit is broken somewhere, while a short fault means two conductors in the circuit are making unintended contact.

A key behavioral detail of this fault is that the unit does not shut down entirely. Instead, the control board defaults to a fixed assumed room temperature of 32°C and continues operating in cooling mode based on that value. This failsafe behavior means the system will run, but temperature regulation will be inaccurate since the unit is no longer responding to actual room conditions. Cooling cycles may run longer or shorter than appropriate, and the set temperature may never be accurately reached.

The most common causes include physical damage to the sensor wire harness, corrosion at the connector terminals, a failed thermistor element, or moisture intrusion into the sensor housing. The first diagnostic step is to inspect the sensor connector for loose pins or corrosion, then measure the thermistor resistance and compare it against the temperature-resistance curve for the specific sensor. A properly functioning NTC thermistor will show decreasing resistance as temperature increases, with a predictable value at room temperature.

Source: manufacturer service documentation.

Common causes of Room Sensor open/short

  1. 01

    Loose or corroded sensor connector

    Wiring / connection

    The connector linking the room temperature sensor to the control board can loosen over time or develop corrosion on the terminals, breaking the circuit and triggering an open fault. Inspect the connector for oxidation, bent pins, or incomplete seating.

  2. 02

    Failed thermistor element

    Part replacement

    The NTC thermistor itself can fail internally, causing its resistance to read open or shorted regardless of temperature. If resistance measured across the sensor terminals is infinite or zero, the thermistor requires replacement.

  3. 03

    Damaged sensor wiring

    Part replacement

    The wiring between the sensor and control board can be pinched, cut, or broken, particularly where it routes through cabinet panels or sharp edges. Visually inspect the full length of the sensor harness for any visible damage.

  4. 04

    Moisture intrusion into sensor housing

    Part replacement

    Condensation or water ingress around the sensor body can cause a short circuit between sensor leads or accelerate corrosion. Check for signs of moisture or water staining near the sensor mounting location.

  5. 05

    Control board input circuit fault

    Part replacement

    If the sensor and wiring both test correctly, the fault may lie in the thermistor input circuit on the control board itself. This is the least common cause and should be considered only after the sensor and harness have been ruled out.

See the test procedure for each cause

Frequently asked questions about Room Sensor open/short

What does Room Sensor open/short mean on a Daewoo air_conditioner?
This error means the control board has detected that the room temperature thermistor circuit is either broken (open) or has a short circuit condition. The thermistor is used to measure ambient room temperature so the unit can regulate cooling properly. When the fault is active, the unit substitutes a fixed value of 32°C for the room temperature and continues running in cooling mode, though accurate temperature control is no longer possible.
Can I fix a Room Sensor open/short error myself?
A knowledgeable DIYer can perform several diagnostic steps, including inspecting the sensor connector for corrosion or loose pins and measuring thermistor resistance with a multimeter. If the sensor wiring or connector is the issue, cleaning the terminals or reseating the connector may resolve it without parts. If the thermistor itself has failed, replacing the sensor is a straightforward repair but requires sourcing the correct replacement part for your specific Daewoo model.
Is it safe to keep running my Daewoo air conditioner with this error?
The unit will continue to operate using a fixed assumed room temperature of 32°C, so it will not shut down dangerously. However, because actual room temperature is no longer being measured, the system cannot regulate cooling accurately, and energy efficiency will be reduced. It is advisable to address the fault promptly rather than leaving the unit in this degraded operating mode indefinitely.
Will resetting the air conditioner clear the Room Sensor open/short error?
A power reset may temporarily clear the error display, but the fault will return as soon as the control board performs its sensor check if the underlying problem has not been fixed. Persistent reappearance of the error after a reset confirms that the sensor, its wiring, or the connector requires physical inspection and repair.
How much does it cost to repair a room temperature sensor fault on a Daewoo air conditioner?
If only the sensor itself needs replacement, parts typically range from $15 to $60 depending on the model, and the repair is relatively quick. If a technician is needed for diagnosis and replacement, total costs including labor generally fall in the range of $80 to $200. Control board replacement, if required, is significantly more expensive and could range from $150 to $400 or more.

Related Daewoo air conditioner codes

All Daewoo air conditioner codes
View all 45 Daewoo 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