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Samsung Air Conditioner E422 Error Code

Refrigerant flow blocked. What it means, which models show it, and how to clear it, easiest fix first.

SamsungAll Samsung air conditioner codes

E422
May need a pro

The system has detected that refrigerant isn't flowing properly through the pipes between the units. Samsung lists service valves that aren't fully open, a blocked pipe, or a leak as the causes, which is why it can show up soon after installation.

Compatible models

Samsung doesn't publish a model list for this code; it appears on Samsung air conditioners with a digital display. Check your owner's manual.

Also shown as

Shown as E422 or C422. On some newer models the description reads EEV or valve-closed error. Meanings here come from Samsung service and installation manuals for specific model families; codes vary by series and region, so check your owner's or service manual.

Difficulty

Try the basic checks, but the usual fix is a technician's job.

Safety first: unplug the air conditioner (or switch off its breaker) before touching filters, hoses or panels. If you smell burning or gas, or see water near the outlet, stop and call a professional.

How to fix Samsung E422

  1. Reset the power at the breaker

    Switch off the breaker that feeds the air conditioner (some systems have separate breakers for the indoor and outdoor units, so switch off both). Wait about five minutes, switch the power back on and restart the unit to see if the code clears.

  2. Contact the installer

    If the system was recently installed or serviced, call the installer. Checking the service valves and refrigerant lines is their job.

When to call a technician

All checks behind this code involve the refrigerant system, which only a licensed technician should open.

Parts linked to E422

These are the parts most often behind this code. Tap one to see what it does and the signs it is failing.

Order parts by your full model number so they fit.

Frequently asked questions

What does E422 mean on a Samsung air conditioner?

The system has detected that refrigerant isn't flowing properly through the pipes between the units. Samsung lists service valves that aren't fully open, a blocked pipe, or a leak as the causes, which is why it can show up soon after installation.

Which Samsung models show the E422 code?

Samsung doesn't publish a model list for this code; it appears on Samsung air conditioners with a digital display. Check your owner's manual.

Can I fix Samsung E422 myself?

Only the basic checks. You can safely try the steps above, but E422 usually points to a part or fault that needs a technician.

What if E422 keeps coming back?

A code that returns after a reset and the checks above usually means a part is wearing out. Note when E422 appears (which cycle, how often) and have your model number ready; it helps a technician bring the right part on the first visit.

Other Samsung air conditioner codes

Last reviewed 2026-10-19. Codes and steps can vary by model; check your owner's manual.

Sources we checked