OnlyErrorCodes.com is a reference for the codes that appliances, vehicles, and electronic devices show when something goes wrong.
Your dryer flashes UE.
Your printer says E5.
Your car throws P0420.
The site tells you what the code means and what to do about it.
There are more than 6,300 error codes covered today across 80+ categories — refrigerators, washing machines, OBD-II diagnostics, solar inverters, induction cooktops, 3D printer firmware faults, smart locks, smart rings, and more.
The live count on the homepage is the real number, updated automatically with every batch.
New codes get added in batches as gaps in coverage are identified.
How this site is run
OnlyErrorCodes.com is independently operated.
Not part of a content network.
Not a syndication partnership.
Not a site licensing material from elsewhere and putting our name on it.
Every page is researched and written specifically for OnlyErrorCodes.com against manufacturer documentation.
Editorial decisions — what gets covered, how a code is described, when a fix is genuinely uncertain — are made in-house and stay consistent across categories.
Coverage grows in batches because that’s the realistic pace for careful research.
We don’t have a 24-hour newsroom.
What we have is consistency: the same editorial voice across every page, no farmed-out batches that contradict each other.
What pages look like
Every page leads with the answer.
The code, the brand, what it means, what to try first.
The structure is not rigid.
A simple low-battery message might be one paragraph and three checks.
A complex compressor fault can run several hundred words because there is more to actually say.
Pages don’t get padded for length when length isn’t useful.
If a fix is ambiguous, the page says so.
If a code is service-only with no realistic DIY path, the page says that too — instead of inventing instructions to fill space.
What the site is not
Not a forum.
Not a parts retailer.
Not a lead generator for repair services.
There are no affiliate links inside code pages, no autobiography blocking the answer, no popup asking you to subscribe before you can see what F9 means.
The job is to answer one question — what does this code mean — and get out of your way.
Editorial approach
Codes get sourced from manufacturer service literature, official manuals, technical service bulletins, and established repair documentation.
Where multiple sources disagree, the page presents both readings rather than picking arbitrarily.
Severity ratings reflect whether the issue is a comfort problem, a wear problem, or a safety problem.
We lean toward caution — a code that could indicate a fire or refrigerant risk gets flagged “high” even if most cases are benign.
For specifics on how content is researched and verified, see the methodology page.
Corrections welcome
Error codes change with firmware.
Manufacturers occasionally redefine codes between model years.
The same letter-number on a 2018 LG dryer can mean something different on a 2024 model.
If a page is wrong or outdated against what your device actually shows, tell us.
Reader corrections drive the largest share of page updates here, and most confirmed corrections ship within a few days of the report.
Disclaimer
Information on this site is reference material, not a substitute for the manufacturer’s manual or a qualified technician.
For codes involving gas, refrigerant, mains electrical work, or anything safety-critical, defer to a licensed professional.