How To Fix the Hayward Pool Heater LO Code

Table Of Contents Hayward Heater LO Code [5 Easy Fixes] 1. Dirty Pool Filter 2. Water Pressure Switch Fault 3. Vent Pressure Switch Fault 4. Temperature Limit Switch Fault 5. Exhaust Gas Temperature Limit Fault FAQs: How do you adjust the pressure switch on a Hayward pool heater?. There are quite a few Hayward pool heater error codes including the error codes AC, AO, bD, CE, EE, HF, HS, IF, IO, LO, PF, SB, SF, and bO. We will take a look at the meaning of all of them in our article and provide you with simple solutions.

Learn what to check and how to resolve issues when the 'LO' code is displayed on your heater.. To clear the LO code, fix or replace the wiring on the limit switches and any other issues with your heater's limit switch, and you may need to do a backwash to clear out any obstructions. Besides that, you'll need to set the correct water pressure setting. That is if your heater is installed below or above the water levels of your pool or spa. What Causes the Hayward Heater LO Code? 1.