How to repair F4 code?

how to repair F4 code on Saunier Duval F12/1 boiler

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Saunier Duval Therma Condens F30E?

When we run our bath the water is luke warm to cold. The bathroom sink and kitchen sink are working properly with lovely hot water.!! please help

isotwin condens f 35 e service menu codes?

Hello, My gas boiler Saunier Duval ISOTWIN CONDENS F 35 E consumes too much gas. I ask for help in obtaining service instructions for this boiler. I am interested in a detailed description of all ser ... more

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Saunier Duval Boiler Red light flashing F18 fault?

What does F18 fault mean?

Saunier Duval Isofast condens F35E....nothing working?

I have been on holiday and turned the boiler off at the mains, on returning turned it on and the remote said Radio fault ...changed the batteries in the remote ... nothing on remote or boiler no manua ... more

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Saunier Duval F35E will not fire up?

boiler has pressure, will not fire up for heating and hot water. the green light flashes and the pressure/temp gauge also flashes. on the odd occasion it burst into life and runs fine.

Saunier Duval Boiler Filling Key?

Hi. I have lost the plastic tube/key that is needed to open the filling loop at my Saunier Duval boiler. I am having trouble finding a replacement. Can anyone help?

I have a Saunier Duval Isotwin condens F 35 E with hot water No heating?

the fault on the board says F 14 which is clear on the manual but I have no idea what F 24 means. My setting is on hot water and heating but the heating is not coming on. anyone know what the fault mi ... more

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My saunier duval boiler programmer is playing up?

Just had the PCB board replaced and now the heating doesn't go off with the programmer. Only way to turn it on or off is to use the dial on the front. Any ideas?

how to light the pilot light?

got a saunier duval SD 620 F the pilot light has gone out how do we relight it

saunier duval thema classic f 24e?

everything calling for heat gas valve not oppening

Saunier Duval Combi boiler?

What is the heat exchanger on a Thema F23E combi boiler made of?

saunier duval xeon 50ff boilere makes a noise when running?

can any one tell me why my boiler has a whine coming from it when firing up

saunier duval 30e?

just seen the query regarding slow running to get decent hot water, was mentioned was the rubber diaphram, BUT , where abouts is it ?

How to replace a bypass valve ?

I have a saunier duval isofast f35e boiler and need to replace the bypass valve.

saunier duval f 24 e problem?

hi. does anyone have any idea,s how to re,pressurise the system on the saunier duval therma classic f 24 e please?

Saunier Duval Thema F23 anyone have a link for manual?

Does anyone have a link for a manual for a Saunier Duval Thema F23 please?

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Saunier Duval timeclock not working?

Home emergency plumber replaced both PCB's, now the timeclock which worked immediately before, does not work. Could this be related ie not reconnected properly? They say not and won't come out.

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Saunier Duval F35E auto-vents down to code 21 in minutes?

7 year old boiler, noticed code 21 (radiator circuit pressure low) so she opened the filling loop but left it open too long. It auto-vented, but kept going until the red light came on and code 21 agai ... more

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