Indoor Room Temperature Sensor Open or Short Circuit

Home Appliance Error Codes Midea Split AC

Can you still use it? With care until repaired

Who can fix it? Needs a technician

Typical repair time 30 minutes – 2 hours

Typical cost SAR 80 to 1,200

What it means

This code appears on Midea split air conditioners with the classic code set when the indoor room temperature sensor (T1) reading is impossible, meaning an open or short circuit. The unit uses this sensor to decide when to run and stop the compressor, so operation stops or becomes erratic when the code shows. The same code can mean something else on other brands.

Models covered: Midea residential split air conditioners with the classic display codes (E0–EC, F1–F4, P0–P4); newer Midea series use different codes (EH, EL, PC) and some models differ.

Symptoms3

The code shows on the indoor unit at start-up or soon after.
The unit does not cool, or does not cycle off at the set temperature.
Room temperature does not match the setting.

Possible causes5

Loose or corroded sensor connector on the indoor board.
Failed sensor (thermistor).
Cut, chafed or rodent-damaged sensor wire.
Water leaking inside the indoor unit onto the sensor or its connector.
Faulty sensor input circuit on the indoor board, the least likely cause.

How to diagnose5

Switch off at the breaker for a few minutes and restart to see if the code is permanent.
With the power off, the technician opens the indoor board cover and checks the T1 sensor connector.
The technician measures the T1 sensor resistance and compares it with the Midea table for the same temperature.
The technician traces the wire for breaks or chafing.
If the sensor and wire are fine, the technician tries a known-good sensor before blaming the board.

How to fix5

Clean the connector and seat it firmly.
Repair or replace the wire.
Fit a new matching T1 sensor in its original position.
Replace the indoor board if its input circuit is proven faulty.
Run the unit and confirm the code is gone.

Repair cost

0–200

200–600

600–1,500

1,500+

In Saudi riyals; the highlighted part is the expected range for this fault.

Most cases are a sensor or connector at low cost; the indoor board is what raises the cost if it has failed.

Prices are rough estimates including the part and the technician’s fee, and vary with brand, model and part source.
Prices last updated: September 2026

Frequently asked questions

Where is the T1 sensor?

In the indoor unit behind the filter at the air intake, connected by a short lead to the indoor board.

Is it an expensive fault?

Usually not. The sensor and connector are cheap parts; the board is replaced only if the sensor tests good.

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This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.

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