The Common Case: Sensor Faults and Inconsistent Hot Water
The most frequent hot water complaint with Ferroli units, particularly Optimax and older Domiproject models, revolves around sensor faults. The NTC (Negative Temperature Coefficient) thermistors, which monitor flow and plate heat exchanger temperatures, are vital for accurate hot water delivery. If one fails or gives erratic readings, the boiler's PCB will misinterpret the demand, leading to fluctuating or lukewarm water. We carry Ferroli sensors for supported models, allowing for a direct replacement to confirm the diagnosis.
- Hot water runs hot then cold.
- Water is consistently lukewarm, never truly hot.
- Boiler cycles on and off during hot water demand.

