Flow temperature rising dramatically fast (5 degrees per second or so)
Why it happens
- The appliance or system has gotten blocked or air-locked causing the main heat exchanger flow pipe to heat up too rapidly.
- Blocked or faulty pump
- Water not moving in the system
- Improper calibration of the heating flow NTC thermistor. Make sure it reads 12Kohms and 20 degrees)
- Improper calibration of the heating return NTC Thermistor. Make sure it reads 12Kohms and 20 degrees)