This is my first post, so if you need more info please let me know.
I have an inground 25000 gallon pool, opened in Late may after wintering.
My heater (Pentair minimax) will not fire up when my Multi-flo is set to Filter. If I set it to recirculate it works. I therefore believed something was wrong with my Hayward DE filter. I took it apart and cleaned it (twice in fact) thoroughly. No improvement. I have noticed that my pressure is lower (its at 10psi) than other years, but nothing seems to take the pressure up.
I therefore now believe something is wrong with the Multi-Flo but not sure and would appreciate some advice before I take that apart.
I was advised that the DE filter Grids needed replacing to fix this problem - does that sound right? They are more than 7 years old which is how long i've had the house.
Note - I have also noticed some leaking from the waste pipe - a small amount in filter mode and a large amount in recirculate mode - does this affect the heater issue?
Any comments will be greatly appreciated.