Hayward HDF400 Troubleshooting Guide

10
How To: Program Temperature Lock-Out
NOTE: The default Max temp set points are 90ºF (Pool) 104ºF (Spa).
When setting the max temp lock-out set point, the LEDs & display should flash rapidly.
Press the ‘MENU ICON’ button to place the
heater in ‘STANDBY’ mode.
Press and hold the minus & plus buttons for 3
seconds.
The ‘SPA’ indicator will flash & the display
should show the Max Temp set point.
Raise or lower the temperature displayed
using the minus or plus button.
Step 2Step 1
Step 3
Step 4
Follow the included steps to lock the maximum temperature allowed.

Hayward HDF400 Specifications

General

Model	HDF400
Category	Gas Heater
BTU Input	400, 000 BTU
Fuel Type	Natural Gas or Propane
Heat Exchanger	Cupro-Nickel
Efficiency	84%
Ignition System	Electronic
Warranty	1 year