Question about Amtrol ST-12-C THERM-X-TROL ASME Expansion Tank, 5 Gallon
If water heater is beeping E-2 it means that the water heater has gotten to high above water heater set point. Things to check
- there hot water being feed from boiler still
- is zone valve or pump isolated stopping flow of water to water heater
-check sensor readings
Posted on May 29, 2017
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Posted on Jan 02, 2017
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