I have a Down East Portsmouth and the heater stopped working but I don't think it is a heater problem. If I turn the jets on the heater (at least the heater light) goes on. I get an error 'LF' for 'low flow'. The manual says the heater will shut down but other spa functions continue to run under this error.
I also saw a 'HL' (not sure what it stands for) error and that says a significant difference between temperature sensors has been detected.
For both errors it says to check water level, make sure pumps have been primed, turn off spa/restart. That didn't help.
I'm thinking it may be a problem with the circulation pump but it seems to be working - just not sure if it's working properly. The circulation pump motor still runs and when I disconnected it from the plumbing in the spa and turned it on, it did shoot water out. I did connect it back but there was no change.
Is it possible that the motor could be working but not at a high enough speed or torque? Or could the impeller possibly not be working right under pressure?
Appreciate any ideas. Thanks.