Hayward HP50A - Test Inlet & Outlet Temp Sensors; Monitor Differential (closing bypass)

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The E06 error implies that the temperature differential between the inlet and outlet
water sensors is greater than 58°F; however the expected differential between these
sensors should be closer to 3.5°F.
Following the chart (pg. 7), verify whether the inlet &
outlet water temperature sensors are reading
accurately. IF they are, go to step 6B. IF not, replace
defective sensor(s) (HPX2000-3242).
Test Inlet & Outlet Temp Sensors
Step 6A
Step 6B
The expected differential, between the inlet and outlet
is 3.5°F. Slowly close the bypass, monitoring the
differential. IF closing the bypass does not correct the
problem, replace the main PCB (HPXMCB50).
Monitor Differential (closing bypass)
6. Error Code: E06