Ariston

The DX and SX designations refer to left/right or dual-channel variants of the electronic ignition ionization unit. Both measure ion current at the flame electrode to confirm ignition. The specific variant (DX: SKU PCM02018; SX: SKU PCM02020) must match the boiler's combustion chamber geometry and electrode configuration. Consult the boiler schematic or cross-reference the failed component's part number to select the correct module.

The VCA safety probe (SKU PCM02024, part 243030) is a thermal cut-off device that interrupts the gas valve supply if boiler water temperature exceeds a set threshold, typically 80–90 °C. It operates independently of the main control thermostat, providing secondary over-temperature protection. Upon cooling below the reset point, the probe re-establishes the circuit without manual intervention.

The ARX20 sanitary thermostat (SKU PCM02026, part 564885) modulates boiler water temperature to maintain a user-set setpoint, typically 35–60 °C for domestic hot-water circuits. It opens and closes the gas valve or modulating valve to prevent overheating and ensure consistent outlet temperature. Common in compact, wall-mounted boilers and combi units.

Yes. We stock ten Ariston boiler spare-part SKUs individually. Components in inventory are available for same-day or next-business-day dispatch from the Singapore warehouse. Out-of-stock items are sourced via global suppliers; standard lead time ranges from 5–14 days depending on availability and destination.

Locate the original component's Ariston part number on the device label or in the boiler's service manual and wiring diagram. Cross-reference it with Our catalog (e.g., 995965, 569560, 243030). If the original part number is unclear, provide the boiler model and the component function (e.g., 'ignition probe', 'temperature switch') for verification before ordering.

The Ariston thermal safety unit (SKU PCM02032, part 570970) is factory-calibrated to a fixed differential (typically 16–10 °C). It is not field-adjustable. Adjustment or recalibration requires specialized equipment and should be performed by the manufacturer. Replacement with an identically calibrated unit ensures code compliance and safe operation.