About Pool Error Codes
An independent reference for pool heater and pump fault codes, built from manufacturer manuals and documented repair guides.
What this site is
Pool Error Codes exists to answer one question quickly: what does the code on my pool heater or pump display actually mean? That information exists, but it's normally locked inside PDF service manuals meant for technicians, not homeowners standing at the equipment pad. This site translates it into plain language — what the code means, what commonly causes it, what's reasonable to check yourself, and where the line is for calling a licensed professional.
Not affiliated with any manufacturer
This is an independent site. It is not operated by, endorsed by, or affiliated with Hayward, Pentair, Raypak, or any other pool equipment manufacturer. Brand and model names are used only to identify which equipment a given code applies to — the kind of reference use that doesn't require a manufacturer's permission or endorsement.
How pages are written
Every code page is built from a specific, citable source: a manufacturer service or installation manual, or a documented repair reference from an established source. Fault code meanings are facts and are described as facts, in our own words — no manual text is copied. A code is only published once its meaning has been verified against a real source; if it can't be verified, it doesn't get a page. Content is drafted with AI assistance and checked against the cited source before publishing.
What "call a professional" means here
Every code page includes a plain statement of when a fault stops being a reasonable DIY check and starts being a job for a licensed technician or electrician. That line is drawn conservatively. Gas-fired pool heaters involve combustion, venting, and carbon monoxide risk; pumps and heaters both run on mains-voltage circuits. This site will tell you to check a filter, a valve, or a water level — it will not tell you to open a gas valve, test line voltage, or bypass a safety switch, and neither should anyone else.
Repair costs
Where cost ranges are shown, they come from published consumer cost guides (cited on the repair cost page), not from quotes this site has collected. They are typical U.S. residential ranges, not estimates for your specific job — actual cost depends on your equipment, region, and the technician you hire. Get a quote from a local licensed professional before assuming any number applies to you.
Corrections
If something on this site is wrong, the fastest way to check is the source cited on that page. If you have access to newer or more accurate manufacturer documentation than what's cited, or you've found an error, that's useful information — the goal is accuracy, not page count.