- HVAC
- Air conditioner
E5
Samsung E5 on an air conditioner: indoor coil sensor fault
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
E5 means the temperature sensor on the indoor unit heat exchanger is shorted or open. Samsung says to check that sensor, which may need replacing: write down the code and contact service, without opening the casing.
Safety first
Stop and check this first
- The E5 sensor sits inside the indoor unit, next to the control board: do not open the casing or pull on wires. Switch off at the breaker if you need to wipe the outside of the unit and leave the repair to the technician.
- If the indoor unit indicator keeps blinking E5, do not keep running the unit blind: Samsung says to contact its service with the code written down.
Safe checks you can perform
- Read the panel code correctly
- Identify the exact model
- Note the code and contact service
- Indoor sensor measurement
Leave these tasks to a qualified professional
- Do not attempt this professional task: Measure the sensor resistance
- Do not attempt this professional task: Check sensor position and connector
- Do not attempt this professional task: Replace the sensor and test the unit
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Measure the sensor resistance
What they doThe technician disconnects the indoor heat exchanger sensor and measures its resistance, comparing it with Samsung's temperature and resistance table for your model.
They must show youthe meter reading and the value the table gives for the sensor temperature.
In writingthe code E5, the resistance measured, the expected value and the date.
Check sensor position and connector
What they doBefore replacing anything, the technician checks that the sensor is still fixed to the heat exchanger and that its connector on the indoor board is firm and free of corrosion.
They must show youthe sensor in its holder and the connector before and after the check.
In writingthe condition the sensor and connector were found in and what was corrected.
Replace the sensor and test the unit
What they doIf the measurement confirms the fault, the technician fits the sensor specified for the model and runs the unit in cooling and heating until E5 no longer returns.
They must show youthe removed sensor, the new one fitted and the unit running without E5.
In writingthe part replaced and why, the modes tested and the date.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Read the panel code correctly
- Who:
- you.
- How:
- look at the indoor unit panel and confirm it shows E5, not E6 or E7, which in the same Samsung tables point to the outdoor sensor and the heater sensor.
- Result that matters:
- being sure the alert is the indoor heat exchanger sensor one.
- If it is E5:
- continue with this page and do not look for the fault in the outdoor unit.
- If it is E6, E7 or another code:
- check its own page, because a different sensor is involved.
- Evidence to keep:
- a sharp photo of the panel showing E5 and the mode the unit was running in at the time.
Evidence: Samsung: Error codes frequently displayed on the indoor unit air conditioner · Samsung: What do Samsung AC error codes mean and how to fix them?
Identify the exact model
- Who:
- you.
- How:
- find the rating label on the side of the indoor unit and copy the model. Samsung notes that the panel design and codes depend on the model.
- Result that matters:
- having the model so service can confirm what E5 means on your unit.
- If you find the label:
- note the model and, if you have it, the user manual for that unit.
- If the label is unreadable:
- photograph the whole unit and the purchase invoice for service.
- Evidence to keep:
- the indoor unit model, a photo of the label and the purchase date.
Evidence: Samsung: Códigos de error en la unidad interior de tu aire acondicionado Samsung · Samsung: Check out the displayed error codes on Samsung indoor unit air conditioner
Note the code and contact service
- Who:
- you.
- How:
- Samsung asks you to write down the code when the indoor unit indicator blinks and give it to your service provider. Add when it appeared and whether the unit stopped.
- Result that matters:
- a complete report that lets the technician go straight to the indoor sensor.
- If E5 returns every time you switch on:
- leave the unit off until the visit.
- If E5 showed only once and does not return:
- keep the note anyway in case it reappears.
- Evidence to keep:
- dates and times of each E5, the mode in use (cooling, heating) and the room temperature at the time.
Evidence: Samsung: Error codes frequently displayed on the indoor unit air conditioner · Samsung: Códigos de error en la unidad interior de tu aire acondicionado Samsung
Indoor sensor measurement
- Who:
- certified air conditioning technician (F-gas in the EU), for the E5 sensor.
- How:
- with the unit isolated, open the indoor unit, check the position and connector of the heat exchanger sensor and measure its resistance against Samsung's table for the model.
- Result that matters:
- knowing whether the sensor is shorted, open, out of place or sound.
- If the reading is off the table or the sensor is loose:
- it is refitted or replaced as Samsung indicates.
- If the sensor reads correctly and sits in place:
- the technician checks the wiring to the board and the board itself.
- Evidence to keep:
- the resistance measured, the reference temperature and a photo of the sensor and its connector.
Opening the indoor unit exposes the control board at mains voltage: certified technician only, with the unit disconnected.
Evidence: Samsung: Error codes frequently displayed on the indoor unit air conditioner · Samsung: Check out the displayed error codes on Samsung indoor unit air conditioner
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- HVAC
- Brand
- Samsung
- Product type
- Air conditioner
Known code variants
- aire acondicionado Daikin E5
- caldera Junkers E5
- Cerapur E5
- Cerapur Excellence Compact E5
- climatisation Daikin E5
- climatizzatore Daikin E5
- code erreur E5 Daikin
- codice E5 Daikin
- código E5 Daikin
- Daikin AC E5
- Daikin E5
- Daikin error E5
- Daikin Fehler E5
- Daikin Fehlercode E5
- E05
- E 5
- E5 218
- E5 332
- error E5 aire Samsung
- error E5 Daikin
- Error E5 Junkers
- error E5 lavavajillas Smeg
- errore E5 Daikin
- Gree E5
- Junkers boiler E5
- Junkers E5
- Klimaanlage Daikin E5
- lavavajillas Smeg no carga agua E5
- panne E5 Daikin
- Samsung AC E5 error
- Samsung E5
- Smeg dishwasher E5
- Smeg dishwasher error E5
- Smeg dishwasher not filling E5
- Smeg lavavajillas E5
- Smeg LVFABCR3 E5
What it means
In the indoor unit error code tables Samsung publishes on its support sites (Malaysia, Pakistan, Saudi Arabia and Latin America), E5 stands for a short circuit or an open circuit in the indoor heat exchanger sensor. Samsung's solution is to check that sensor in the indoor unit, with possible replacement. Samsung notes that the display panel and codes vary by model. E5 on its own does not prove the sensor is broken either, only a measurement settles that.
Warnings and stop conditions
- Higheditorial warning
The E5 sensor sits inside the indoor unit, next to the control board: do not open the casing or pull on wires. Switch off at the breaker if you need to wipe the outside of the unit and leave the repair to the technician.
Evidence: Samsung: Error codes frequently displayed on the indoor unit air conditioner · Samsung: Check out the displayed error codes on Samsung indoor unit air conditioner
- Mediumsource verified
If the indoor unit indicator keeps blinking E5, do not keep running the unit blind: Samsung says to contact its service with the code written down.
Evidence: Samsung: Error codes frequently displayed on the indoor unit air conditioner · Samsung: Códigos de error en la unidad interior de tu aire acondicionado Samsung
Symptoms and causes
Probable causes · in order
- Heat exchanger sensor shortedCommon
Samsung gives a short in the indoor heat exchanger sensor as the first cause of E5 in its indoor unit tables.
Evidence: Samsung: Error codes frequently displayed on the indoor unit air conditioner · Samsung: Códigos de error en la unidad interior de tu aire acondicionado Samsung · Samsung: Check out the displayed error codes on Samsung indoor unit air conditioner
- Heat exchanger sensor openCommon
The second cause Samsung lists for E5 is the indoor sensor in open circuit, meaning the board gets no valid reading from that sensor.
Evidence: Samsung: Error codes frequently displayed on the indoor unit air conditioner · Samsung: Códigos de error en la unidad interior de tu aire acondicionado Samsung · Samsung: Check out the displayed error codes on Samsung indoor unit air conditioner
Virtual technician
Does E5 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Samsung: Error codes frequently displayed on the indoor unit air conditioner
Samsung Electronics · 2022 · official_doc
- 2
Samsung: Códigos de error en la unidad interior de tu aire acondicionado Samsung
Samsung Electronics · 2026 · official_doc
- 3
Samsung: What do Samsung AC error codes mean and how to fix them?
Samsung Electronics · 2026 · official_doc
- 4
Samsung: Check out the displayed error codes on Samsung indoor unit air conditioner
Samsung Electronics · 2022 · official_doc
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