Room Temperature Sensor Error

Home Appliance Error Codes TCL 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 TCL split air conditioners when the indoor board finds the room temperature sensor reading missing or out of range, meaning the sensor or its wire is open or shorted. Without this reading the unit does not know the real room temperature, so it stops or runs without normal cycling. TCL codes are not the same across all series, so check your unit manual to confirm the meaning. The same code can mean something else on other brands.

Models covered: TCL split air conditioners; codes differ between TCL series, so confirm with the unit manual.

Symptoms3

The code shows on the indoor unit display.
The room does not cool, or gets colder than set.
The unit may start and stop irregularly.

Possible causes5

Water or moisture inside the indoor unit near the sensor from a blocked drain.
Sensor connector not tight on the indoor board or corroded.
Sensor (thermistor) failed with age or moisture.
Broken wire or damaged insulation.
Faulty sensor input on the indoor board.

How to diagnose5

Check the unit manual to confirm the code refers to this sensor on your model.
Switch off at the breaker for a few minutes and restart.
The technician inspects the sensor and its connector with the power off.
The technician measures the sensor resistance and compares it with the TCL table at the current temperature.
The technician tries a known-good sensor before replacing the board.

How to fix5

Refit the sensor in its correct position if it has moved.
Clean the connector and repair the wire.
Replace the sensor with a part matching the model.
Replace the indoor board if its sensor input is proven faulty.
Run the unit and confirm the code has cleared.

Repair cost

0–200

200–600

600–1,500

1,500+

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

Usually a sensor or connector at low cost; the cost only rises if the indoor board must be replaced.

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

Can a blocked drain be related?

It can. If water builds up inside the indoor unit and reaches the sensor or its connector, the reading changes, so clear the drain too.

Does the board need replacing?

Rarely. The sensor and connector are checked first because they cause most cases.

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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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