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Sheath Thermostat Lg 350

Part number (MPN)
338290

OEM Replacement Part & Compatibility Table

Brand
Guide price (£)
Not available: check the current price with the seller
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

  • MULTIPUISSANCE 1000 HTR ELEC
  • MULTIPUISSANCE 1500 HTR ELEC
  • MULTIPUISSANCE 2000 HTR ELEC
  • MULTIPUISSANCE 2500 HTR ELEC
  • MULTIPUISSANCE 3000 HTR ELEC
  • MULTIPUISSANCE 500 HEATER ELEC
  • MULTIPUISSANCE 750 HEATER ELEC
  • PERFORMANCE 1000 HEATER ELEC
  • PERFORMANCE 1500 HEATER ELEC
  • PERFORMANCE 500 HEATER ELEC
  • PERFORMANCE 750 HEATER ELEC
  • PERFORMANCE PLUS 1000 HTR ELEC
  • PERFORMANCE PLUS 1500 HTR ELEC
  • PERFORMANCE PLUS 500 HTR ELEC
  • PERFORMANCE PLUS 750 HTR ELEC

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

Frequently asked questions

Which appliances does 338290 fit?

The sources we checked list 338290 (Sheath Thermostat Lg 350, Ariston) for: MULTIPUISSANCE 1000 HTR ELEC, MULTIPUISSANCE 1500 HTR ELEC, MULTIPUISSANCE 2000 HTR ELEC, MULTIPUISSANCE 2500 HTR ELEC, MULTIPUISSANCE 3000 HTR ELEC, MULTIPUISSANCE 500 HEATER ELEC, MULTIPUISSANCE 750 HEATER ELEC, PERFORMANCE 1000 HEATER ELEC, PERFORMANCE 1500 HEATER ELEC, PERFORMANCE 500 HEATER ELEC, PERFORMANCE 750 HEATER ELEC, PERFORMANCE PLUS 1000 HTR ELEC, PERFORMANCE PLUS 1500 HTR ELEC, PERFORMANCE PLUS 500 HTR ELEC, PERFORMANCE PLUS 750 HTR ELEC. Always check the model and serial number on the data plate before ordering.

Does 338290 have equivalent or superseded part numbers?

The sources we checked list no equivalents for 338290. Ask a Ariston stockist to confirm.

What should I check before fitting 338290?

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.

Related parts

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Some lists are dated and the part may have been superseded.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