HAYWARD H250 LO Code
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
|
86%
CONF
|
Water Pressure Switch (2 PSI)
The 'LO' code signifies the limit string is open, and the water pressure switch is the most common mechanical failure point in this circuit. This switch ensures the heater only fires when water is circulating; its internal diaphragm frequently fails or becomes clogged with calcium/debris, preventing the contacts from closing even when flow is adequate.
SKU: HDXWPS1930
|
|
|
1%
CONF
|
High Limit Switch Kit
If the water pressure switch is functioning, the high-limit switches are the next components in the limit string. These sensors trip if the heat exchanger exceeds safe temperature thresholds; they can fail electrically (opening the circuit permanently) or trigger prematurely due to scaling inside the heat exchanger.
|
|
|
13%
CONF
|
Pool Filter Cartridge / Sand Media
While not a heater component, a dirty filter is the leading external cause of the 'LO' code. Reduced GPM (gallons per minute) prevents the pressure switch from closing. Cleaning or replacing the filter media often restores the necessary 25 GPM required for the H250 model to operate.
|
DIY Repair Guide
Watch exactly how to replace the Water Pressure Switch (2 PSI).
// NOTICE:
This report is generated by an Agentic AI Engineer utilizing probabilistic modeling.
PartSniper is an automated parts recommender service. AI-generated results may not be correct. This data is not a substitute for professional engineering advice or manual inspection. Always verify part compatibility and disconnect power before any repair. PartSniper is not liable for inaccuracies, injury, or damage.