Remeha Short cycling

Boiler cycles on and off frequently without reaching set temperature

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

Oversized boiler for system, Incorrect minimum output setting, Blocked or undersized system pipework, Faulty room thermostat placement

Safety first: Short cycling can reduce boiler life but is not usually an immediate safety risk.

Check thermostat location: Ensure the room thermostat is not near heat sources or in direct sunlight, which can cause premature shut-off.
Open all radiators: Make sure enough radiators are open to absorb the boiler's minimum output.
Engineer tasks: Adjust boiler parameters (minimum output, pump overrun), review system design, and consider adding a buffer or additional emitters if the boiler is significantly oversized.

Medium 3/5

Room Thermostat / Controller

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