![](/images/flag/s/en.gif)
Water too hot and/ 2. Temperature set too high 2. Reduce temperature setpoint or ER2 message on 3. Temperature sensor not fully inserted 3. Re-insert thermistor wire or temperature sensor. Smart Control™ 4. Stuck zone valve 5. Flow check valve stuck open 4. Repair or replace 5. Clean, repair or replace 1. Air in boiler loop 1. Purge boiler loop. Check air elimination equipment. Noise from 2. Faulty circulator pump 2. Repair or replace pump BoilerMate® 3. Thermal expansion 3. Ensure the proper Th