Inspect the water pressure switch wiring, ensuring
wire harness terminals are securely fastened. IF
damaged, replace wire harness (pg. 25). IF secure
and free of damage, go to step 11B.
Voltage test
Inspect water pressure switch
44
“LO” Code (Limit Open) may relate to water flow. Verify the pump is running &
adequate water is flowing through heater.
“LO” is NORMAL when the pump is turned off or there is insufficient water flow.
With filter pump running, take one lead from your
multi-meter and place it on the terminal with the
white wire on the gas valve, then Go To Step 11C.
11. Service LED ON: “LO” Code
Step 11A Step 11B
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