Well this is the second time we have had the same problem. Flo error and thus no heating. We could fool it by restarting the pool and putting it on full flow.
Was told the flow meter was unserviceable. so twice now replaced the whole heater unit at $365 NZD.
Well this time I pulled the unit apart, the flow meter is simply attached to the outside if the tube so its using some sort of impedance to measure the flow.
It easily comes off and unplugs so why is it not a replaceable part??
Are we being ripped off here??