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Contact NTC Probe

Part number (MPN)
990405
Check compatibility

Type your appliance model: we compare it with the 2 appliances in our sources.

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Parts for the same appliances

OEM Replacement Part & Compatibility Table

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Guide price (£)
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Source
retailer parts list
checked 2026-11-06
Fitting notes

Work on gas appliances must be carried out by a Gas Safe registered engineer. Check the model and serial number on the boiler data plate. Source: a parts retailer's list, not the manufacturer's: confirm the part number on the data plate or with the manufacturer before ordering.

Compatible appliances

Always check the model and serial number on the data plate before ordering.

Frequently asked questions

Which appliances does 990405 fit?

The sources we checked list 990405 (Contact NTC Probe, Ariston) for: Ariston ACO 27 RFFI System, Ariston ACO 32 RFFI System. Always check the model and serial number on the data plate before ordering.

Does 990405 have equivalent or superseded part numbers?

The sources we checked list no equivalents for 990405. Ask a Ariston stockist to confirm.

What should I check before fitting 990405?

Work on gas appliances must be carried out by a Gas Safe registered engineer. Check the model and serial number on the boiler data plate. Source: a parts retailer's list, not the manufacturer's: confirm the part number on the data plate or with the manufacturer before ordering.

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Some lists are dated and the part may have been superseded. Information only, compatibility not guaranteed.