Since it's started to get sunny here for the last few days, we turned on our sprinkler system for the lawn. However, after we turned it out, we discovered some of the sprinkler heads were not working.
It was weird - some of them would work some of the time but no two times were the same.
We called the sprinkler guys since we were still covered under the warranty. Turns out the issue is the filter in the sprinkler system - it was completely clogged with deposits from the well. Once it was cleaned and put back in, it was fine.