Alpha Short Cycling Due to Oversizing or Control Issues

Boiler starts and stops frequently (short cycling) even when there is a continuous demand for heat.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Boiler output too high for system, Incorrect parameter settings, Faulty temperature sensor, Poor system circulation

Safety: Parameter changes should be made by a trained person following the Alpha manual.

Check room thermostat location: Ensure the thermostat is not near a heat source or in a draught, which can cause rapid on/off cycling.
Radiator balancing: Properly balanced radiators help dissipate heat evenly and reduce cycling.
Adjust boiler output (qualified person): In the installer menu, reduce the maximum CH output to better match the system size.
Verify sensors: Test flow and return NTC sensors for correct readings.

Medium 3/5

Flow Temperature Sensor (NTC)

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