mypros+
Error code reference

Samsung Air Conditioner Error Code E164

No change of EVAP IN temperature during piping check.

Samsung codesSamsung air conditioner codes
Avg. service call
$285
National average. Trip fee plus diagnostic plus labor. Before parts.
MyPros+ 3-day pass
$9.95
Same diagnostic steps, on your phone. Start now.
You keep in your pocket
~$275
Even before you buy the part.
Skip the service call. Fix it yourself.
Full procedure unlocks instantly.
Get Started

What the E164 error code actually means

Your Samsung air conditioner ran a self-check and noticed that the temperature at the refrigerant inlet on the indoor coil did not change the way it should have. This usually means refrigerant is not flowing properly into the indoor unit, often because of a faulty or disconnected valve that controls refrigerant flow. A technician will need to inspect the internal components and system settings to resolve this.

Diagnostic procedure

The full E164 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check indoor unit address matches MCU; check EEV connection to PCB; check EEV coil insertion.
Unlock with pass
Unlock with pass
Unlock with pass
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
Unlock E164 procedure $9.95

Or subscribe: $29/month for unlimited access to all codes plus Max AI diagnostics.

Most common causes of E164

Ranked by how often they cause this code
  1. 1EEV coil not fully inserted or seated
  2. 2EEV wiring harness disconnected or faulty
  3. 3Indoor unit address mismatch with MCU
  4. 4Failed or stuck EEV
  5. 5EVAP IN temperature sensor fault

Most DIYers save hundreds by diagnosing before ordering parts.

Get Started

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

Questions people ask about E164

What does E164 mean on a Samsung air conditioner?
E164 indicates that the evaporator inlet temperature did not change during the system's piping check sequence. This check is designed to confirm that refrigerant is flowing properly through the indoor unit. The most common causes are a disconnected or improperly seated Electronic Expansion Valve coil, a wiring issue between the EEV and the PCB, or an indoor unit address mismatch with the master control unit.
Is it safe to run my Samsung air conditioner with an E164 error?
Operating the unit while E164 is active is not recommended. The error indicates that refrigerant flow into the evaporator coil may not be functioning correctly, which can lead to reduced cooling performance, potential compressor strain, and further component damage over time. The system should be inspected and the fault resolved before resuming normal operation.
Will resetting my Samsung air conditioner clear the E164 error?
A power reset may temporarily clear the E164 code, but the error will return if the underlying issue is not resolved. Because the code is triggered during a piping check sequence, the system will repeat the test and re-detect the fault if the EEV, its wiring, or the unit address configuration are not corrected. A reset alone is not a fix.
Can I fix E164 on my Samsung air conditioner myself?
Some causes of E164, such as an incorrect indoor unit address setting or a loose EEV coil connection, can be addressed by a knowledgeable technician or advanced DIYer with access to the system's configuration settings. However, diagnosing and replacing components like the EEV or temperature sensor involves working with refrigerant circuits and PCB wiring, which is best handled by a certified HVAC technician.
How much does it cost to repair a Samsung air conditioner showing E164?
Repair costs depend on the root cause. If the issue is a loose EEV coil or an address configuration correction, labor costs could range from $75 to $150. If the EEV itself needs to be replaced, parts and labor combined could range from $200 to $500 or more depending on the unit and service region. A proper diagnosis is needed before estimating repair costs.

Related Samsung air conditioner error codes

All 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