Hayward ProLogic Troubleshooting Manual page 26

The ProLogic supports features like Solar Priority. Verify that no additional heating is
occurring, as this can take precedence over automatic heating.
26
5. Heater Not Firing (cont.)
Verify set points and/or errors
Step 5E
First verify the status of the Check System LED. IF ON,
go to the 'Default Menu' to identify if error relates to
heating (i.e. water temperature sensor failure). IF
Check System LED is OFF, access the heater set points
under the 'Settings Menu'. Raise all heater set points to
104°F. IF heater still does not fire contact a pool
professional by visiting:
pool.com/shop/en/pools/Dealer-Locator
Prior to calling, under the 'Settings Menu' return set
points back to their original state.
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