Ferroli
Ferroli 2-Stage Regulating Thermostat 39804010
Two-stage regulating thermostat for Ferroli GN and Pegasus boilers, controlling the high and low burner stages.
£86.30
£71.92 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The 2-Stage Regulating Thermostat is a Ferroli boiler control component, part number 39804010. It regulates the changeover between the high and low firing stages of the appliance so output tracks heat demand. It is used across the Ferroli GN and Pegasus boiler families.
Signs this part needs replacing
- The boiler runs only on high fire or only on low fire, with no changeover between stages
- Flow temperature overshoots the setpoint or swings widely during operation
- The appliance locks out or shuts down during a heating or hot water demand
- Repeated high-limit trips or overheating during normal running
Before you order
- Confirm the existing thermostat's part number is 39804010 before removal
- Check the boiler model and data plate against the fit list above
- Note the appliance variant, as the GN2, GN4 and Pegasus families share this control
- Thermostat replacement involves burner control circuits, so fitting should be carried out by a competent heating engineer
Compliance
| Alternative numbers | FER39804010 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| FERROLI FERROLI GN2N | — | — | — | |
| FERROLI FERROLI GN4N | — | — | — | |
| FERROLI FERROLI PEGASUS F2 WN | — | — | — | |
| FERROLI FERROLI PEGASUS F2N | — | — | — | |
| FERROLI FERROLI PEGASUS F3N | — | — | — | |
| FERROLI COMMERCIAL GN2 MOD 05 - 3540732/0 (01/01/2001) | — | — | — | |
| FERROLI COMMERCIAL GN2 MOD 06 - 3540732/0 (01/01/2001) | — | — | — | |
| FERROLI COMMERCIAL GN2 MOD 07 - 3540732/0 (01/01/2001) | — | — | — | |
| FERROLI COMMERCIAL GN2 MOD 08 - 3540732/0 (01/01/2001) | — | — | — | |
| FERROLI COMMERCIAL GN2 MOD 09 - 3540732/0 (01/01/2001) | — | — | — |
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Documents & drawings
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