Hayward Pool Heater Error Code 10: How to Fix It

Q: What does error code 10 mean on a Hayward pool heater?

Error code 10 indicates a pressure switch fault. The heater detects insufficient water flow, often caused by a clogged filter, low water level, or a faulty pressure switch.

Q: How do I reset a Hayward pool heater error code 10?

First, resolve the underlying flow issue (clean filter, check water level, open valves). Then turn the heater off and on at the breaker. On some models, press the manual reset button on the pressure switch.

Q: Can I bypass the pressure switch on a Hayward heater?

Never bypass the pressure switch. It is a critical safety device that prevents dry-firing and damage. If it's faulty, replace it.

Q: Why does my Hayward heater show error 10 even after cleaning the filter?

Possible causes include a blocked pump strainer, closed valves, a faulty pressure switch, or low water level. Also check for a clogged heat exchanger.

Q: How much does it cost to fix Hayward pool heater error code 10?

If DIY, a pressure switch costs $20-$50. Professional service call and repair may range from $150-$400 depending on the issue.

Abstract

Hayward pool heater error code 10 indicates a pressure switch fault. This means the heater isn't detecting proper water flow, often due to a clogged filter, low water level, or a faulty pressure switch. We'll walk you through checking common causes and resetting the system.