mukarram360/hvac-error-codes

HVAC Bench Error Code Dataset

Error codes from HVAC equipment sold in the United States, United Kingdom, and Europe, as published by HVAC Bench. Each record gives the manufacturer, the code, the product family the definition applies to, a plain-language meaning, the checks an owner can safely make, the point at which a technician is needed, and the date the definition was last checked against manufacturer documentation. Codes are specific to a product family and are not interchangeable between brands.

• Publisher: HVAC Bench
• Creator: Mukarram Haroon, HVAC Bench
• Dataset page: https://hvac-bench.com/data/hvac-error-codes/
• DOI: 10.5281/zenodo.22698962 (all versions: 10.5281/zenodo.22698961)
• Version: 1.0.0 (updated 2026-09-11)
• Licence: Creative Commons Attribution 4.0 International
• Records: 87 codes across 38 manufacturers and 9 equipment types

Read this before using a code

An HVAC error code is defined by the manufacturer for a specific product family. The same code can mean different things on two brands, and on two generations of the same brand. Every record states the product family its definition was documented for in product_family and scope_note. Do not apply a record outside that scope, and do not merge records from different brands into one universal list.

The owner_safe_checks column lists only checks that need no tools and no access to live electrical parts, refrigerant, or combustion components. Everything else belongs in call_a_technician_when.

Files

File	Format
hvac-error-codes.csv	CSV, UTF-8, RFC 4180, header row
hvac-error-codes.json	JSON with dataset metadata and a records array

The same data is served live at https://hvac-bench.com/api/v1/error-codes/ with cross-origin access allowed.

The canonical copy is the dataset page on HVAC Bench. Identical copies are published on:

• GitHub
• Zenodo
• Kaggle
• Hugging Face

Columns

Column	Description
id	Stable record identifier, taken from the reference page address.
brand	Manufacturer name as it appears on the equipment.
brand_slug	Lowercase manufacturer key, stable across versions.
error_code	The code as the display or controller shows it.
equipment_type	Equipment category, such as ductless-mini-split or boiler.
product_family	The product family the definition was documented for. A code is only valid inside this scope.
models	Models or series named in the documentation, separated by semicolons.
fault_category	What kind of fault the code reports, such as communication-fault.
title	Headline of the HVAC Bench reference page.
meaning	Plain-language definition of what the control detected.
scope_note	Limits on where the definition applies, when the documentation states them.
owner_safe_checks	Checks an owner can make without opening the equipment, separated by a vertical bar.
call_a_technician_when	Conditions and work that need a qualified technician, separated by a vertical bar.
reset_guidance	What the documentation permits for a reset, when it says.
evidence_class	Class of primary documentation behind the definition.
evidence_publishers	Publishers of that documentation, separated by semicolons.
last_reviewed	Date the definition was last checked against its source (ISO 8601).
reference_url	The full HVAC Bench reference page for this code.

Coverage by manufacturer

Manufacturer	Records
Daikin	5
Goodman	5
Gree	4
Mitsubishi Electric	4
MRCOOL	4
York	4
Carrier	3
Ideal Heating	3
Lennox	3
LG	3
Panasonic	3
Pioneer	3
Rheem	3
Senville	3
Vaillant	3
Ariston	2
Baxi	2
Bosch	2
Della	2
Google Nest	2
Haier	2
Hitachi	2
Klimaire	2
Midea	2
tado	2
Worcester Bosch	2
Amana	1
American Standard	1
Blueridge	1
Cooper & Hunter	1
Daikin Altherma	1
Hisense	1
NIBE	1
Ruud	1
Samsung	1
Toshiba	1
Trane	1
Viessmann	1

How the records are made

Each record is taken from a published HVAC Bench reference page that has been checked against the manufacturer's own documentation: a service manual, an installation or operation manual, or an official support article. Definitions are paraphrased rather than copied, and the class and publisher of the documentation are recorded in evidence_class and evidence_publishers. The full reasoning, diagnostic branches, and safety limits for each code are on the page in reference_url.

Embeddable lookup

A free lookup widget reads this dataset:

<div data-hvac-bench-lookup>
  <a href="https://hvac-bench.com/error-codes/">HVAC error codes from HVAC Bench</a>
</div>
<script src="https://hvac-bench.com/embed/error-code-lookup.js" async></script>

Attribution

Under CC BY 4.0 you may share and adapt the data for any purpose, including commercially, provided you give credit. Please attribute as:

HVAC Bench Error Code Dataset by HVAC Bench (https://hvac-bench.com), CC-BY-4.0

Citation

@misc{hvacbench_error_codes,
  title     = {HVAC Bench Error Code Dataset},
  author    = {Haroon, Mukarram},
  publisher = {HVAC Bench},
  year      = {2026},
  version   = {1.0.0},
  doi       = {10.5281/zenodo.22698962},
  url       = {https://hvac-bench.com/data/hvac-error-codes/}
}

Corrections

Report an error through https://hvac-bench.com/contact/. Corrections that change a definition are logged at https://hvac-bench.com/corrections/.