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Biasi Boiler Burner Modulation Or Heat Exchanger is Blocked.

By Futli @futlim

Biasi Boiler Burner modulation or heat exchanger is blocked.

Demand for central heating is on. The burner modulates from ignition to high then the burner starts to fluctuate between high and low with a high frequency. The burner does not seem to be stabilizing! Whats going on. Is it a partially blocked or scaled main heat exchanger? or is it due to faulty temperature sensor or PCB? The reason was identified and the boiler was serviced .
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