I just cleaned my filter on my sprinkler (I have done that many times in the past). But this time when I turned on the sprinkler system the filter chamber does not totally fill up with water. There is an air bubble which in turns make the entire system weak.

I tried taking the fill cap off the pump to see if it was full and it was.
I tried poking the value that prevents the pump to drain back into the well and it seems OK.
I have the well value wide open.

Do I have to bleed the system and if so how do I do that?

I just cleaned my filter on my sprinkler (I have done that many times in the past). But this time when I turned on the sprinkler system the filter chamber does not totally fill up with water. There is an air bubble which in turns make the entire system weak.

I tried taking the fill cap off the pump to see if it was full and it was.
I tried poking the value that prevents the pump to drain back into the well and it seems ok.
I have the well value wide open.

Do I have to bleed the system and if so how do I do that?
... try posting your question in the Plumbing section of the forums.