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Problem is that the controller will not turn on any zones for water. Once in a while it will turn them on and other times not at all. I went to turn a zone on this morning to see if it would work and it turned the zone on for 1-2 minutes and then shut off. When you switch to manuel to turn on a zone it shows that the zone is on (lights are on) but no water. Replaced 2 transformers on the controller last season and this fixed the problem. Now it is acting up again. Do I have something else wrong and/or what is causing me to loose transformers?