The filter timer was set from 10am to 2pm on high and from 7pm to 8pm on low. However, I found that recently, the filter can start on the set time but it can not stop on the set time. What's wrong with it? I just moved in this house and does not have the manual for the filter.
I am in Texas. It is super hot recently. Is it possible due to some temperature sensor? So, when it is hot, it will keep running?