I just moved to a 8 year old house this past winter with a pool. I just started everything up and fixed a few leaky gaskets and the usual. However, the heater will not start up.
Once power is applied the heater displays 128, then a code across the display is r=5 .
Then the display disappears, absolutely no lights on the front panel. Pushing buttons gets no response. Neither service light are on either.
I turned off, then on again to look under the lid, all diag lights come on during boot, then all off again. No trouble codes.
Basket, filter, everything clean and pressure seems to be flowing great out of outlets in pool.