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Thermostat - 100C Limit

Part number (MPN)
39800170
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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 39800170 fit?

The sources we checked list 39800170 (Thermostat - 100C Limit, Ferroli) for: Ferroli Arena 20 - 30A, Ferroli Arena 20 - 30C, Ferroli Arena 30A, Ferroli Arena 30C, Ferroli Combi 100 FF Popular, Ferroli Combi 76 FF, Ferroli Combi 77 CF, Ferroli Combi 77 FF, Ferroli Combi 77 FF Popular, DOMINA N 80 DGT COMBI NG, Ferroli Hawk 11, Ferroli Maxima 35 S, Ferroli Optima 1000, Ferroli Optima 1001, Ferroli Optima 200, Ferroli Optima 2000, Ferroli Optima 2001, Ferroli Optima 201, OPTIMA 600 COMBI NG, Ferroli Optima 601, Ferroli Optima 700, Ferroli Optima 701, Ferroli Optima 800, Ferroli Optima 801, Ferroli Optima 900, Ferroli Optima 901, Ferroli Roma 55 FF/92, Ferroli Sigma 30-40, Ferroli Sigma 50-60, Ferroli Sigma 60-100, Ferroli SYS 45200, TEMPRA 18 SYSTEM NG, Ferroli Tempra 24, Ferroli Tempra 30, Ferroli Tempra 43435, Ferroli Xignal. Always check the model and serial number on the data plate before ordering.

Does 39800170 have equivalent or superseded part numbers?

The sources we checked list no equivalents for 39800170. Ask a Ferroli stockist to confirm.

What should I check before fitting 39800170?

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Some lists are dated and the part may have been superseded.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.