So I decided to try the no filters approach yesterday and overnight. I woke up this morning to a "dr" error code, which by all accounts means -
"Persistent low flow problems. (Displays on the fifth occurrence of the HFL message within 24 hours.) Heater is shut down, but other spa functions continue to run."
I wonder if this means that my circulation pump is not working correctly.... I have the hot tub repairer coming out on Tuesday. I am bracing myself for the cost! 😞 although from reading up about not changing filters I wonder if 7 years with the same filters might destroy a circulation pump - so its my fault really.
thanks
Brian