404517 Overheat Thermostat M4X6

Potterton 404517 Overheat Thermostat M4X6

This part fits the following:

Main HE HEAT ONLY 9
and Main HE HEAT ONLY 12
with Main HE HEAT ONLY 15
plus Main HE HEAT ONLY 18
fits Main HE HEAT ONLY 24
and Potterton KINGFISHER MF CF 100
with Potterton KINGFISHER MF CF 40-100
plus Potterton KINGFISHER MF RS 100
fits Potterton KINGFISHER MF RSL 100
and Potterton KINGFISHER MF CF 40
with Potterton KINGFISHER MF RS 40
plus Potterton KINGFISHER MF CF 50
fits Potterton KINGFISHER MF CFL 50
and Potterton KINGFISHER MF RS 50
with Potterton KINGFISHER MF RSL 50
plus Potterton KINGFISHER MF CF 60
fits Potterton KINGFISHER MF CFL 60
and Potterton KINGFISHER MF RS 60
with Potterton KINGFISHER MF RSL 60
plus Potterton KINGFISHER MF CF 70
fits Potterton KINGFISHER MF CFL 70
and Potterton KINGFISHER MF RS 70
with Potterton KINGFISHER MF RSL 70
plus Potterton KINGFISHER MF CF 80
fits Potterton KINGFISHER MF CFL 80
and Potterton KINGFISHER MF RS 80
with Potterton KINGFISHER MF RSL 80
plus Potterton KINGFISHER MF CF 90
fits Potterton KINGFISHER MF CFL 90
and Potterton KINGFISHER MF RS 90
with Potterton KINGFISHER MF RSL 90

Plus

Potterton SLIMLINE MODULAR
fits Potterton SUPRIMA 100
and Potterton SUPRIMA 100 L
with Potterton SUPRIMA 120 L
plus Potterton SUPRIMA 30
fits Potterton SUPRIMA 30 HE
and Potterton SUPRIMA 30 L
with Potterton SUPRIMA 40
plus Potterton SUPRIMA 40 HE
fits Potterton SUPRIMA 40 L
and Potterton SUPRIMA 50
with Potterton SUPRIMA 50 HE
plus Potterton SUPRIMA 50 L
fits Potterton SUPRIMA 60
and Potterton SUPRIMA 60 HE
with Potterton SUPRIMA 60 L
plus Potterton SUPRIMA 70
fits Potterton SUPRIMA 70 HE
and Potterton SUPRIMA 70 L
with Potterton SUPRIMA 80
plus Potterton SUPRIMA 80 HE
fits Potterton SUPRIMA 80 L

More information:

Usually when a boiler overheats, the unit will recognise that heat is rising to an unsafe level, triggering a safety feature which causes it to shut down.

This is a safety mechanism that has been introduced in recent years, and it’s something that all good modern boilers are fitted with.