We recently purchased a home with a pool and the previous owners had the Hayward EC40AC filter system with the Power-Flo Matrix Pump. We put everything together and started the pump and everything ran great for about 15 minutes. After 15 minutes there was very little return flow coming from the filter, and after about 20 there was none. The starting pressure was about 15-18 PSI, and in about 10 minutes it went to 25-27, then 2 mins later about 30 PSI.
After bumping the handle, the same thing happened only at shorter intervals and flow stopped after 10 minutes. Keep in mind we have been trying to vacuum our pool with a suction vacuum, but this also happens while just skimming.
So we completely emptied the filter, took off the head and washed the fingers off with a hose (did not acid wash, previous owners I am sure never did either), cleaned all the old D.E. out and started fresh. We started the pump and it shot out of the return like a cannon, still running around 15 PSI, then we hooked the suction vacuum up to it. The vacuum ran great for 20 mins, and then the same thing happened with the low flow to no flow scenario.
We called a Hayward approved service tech out and he told us we needed to replace the filter because it is just malfunctioning due to years of negligence. We got an estimate of $500 to do this, and I know I can get a filter for half on Amazon but had a question first. Does it seem I should just go ahead and replace the filter, or give the fingers an acid wash? It seems very strange that it would work great for 15-20 mins then just go to nothing and be deemed broken.
Sorry for the long post but this has been incredibly frustrating for us and has cost us a lot of money in technicians with no results.