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Ok, thanks for the response. Since I can get the green indication from both lever positions with both tanks on, I would thnk that the overflow valves have reset even if they were triggerd. And I now do get the proper switchover with adequate pressure which I wasn't getting before. Since I fixed the very small leak that problem seems to have gone away. But now the only problem I'm experiencing is the indicator isn't doing what it is supposed to do. However, your comments have caused me to think of two other things I can try to try to isolate this.
1.) Switch tanks from side to side to see if the indicator problem follows the tank.
2.) Try running the furnace to see if it will light. This was when and how I first realized I had a problem. It wouldn't light after a auto switchover.
The overflow check valves are also in the Marshal hose connections, which may be acting up too?
Will report back test results.
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