How to mend ... Bosch 400

Worcester Bosch Highflow 400 rsf boiler problem?

I have a problem with my Worcester Bosch Highflow 400 rsf boiler. If hot water is on, I cannot get central hea... [Read more]

worcester 400?

We have a Worcester Bosch 400 and th boiler lights won't come on there is power to it _ any ideas?

Worcester bosch highflow 400 combi boiler?

Hi, I have the Worcester bosch highflow 400 combi boiler I understand the principle of having the Heatbank but... [Read more]

where is the water pressure tap ?

I have a worcester bosch 400 highflow and can't seem to find how I top the water up for the pressure, it's wel... [Read more]

Worcester bosch highflow 400 combi boiler NOT working? ?

Hello the boiler cut out the other day i have tried to light it by depressing the grey button then lighting th... [Read more]

Worcester bosch highflow 400 combi boiler NOT working?

There is no water or heating in my flat.....the black arrow on the pressure gauge is at around 1.5....( it was... [Read more]

How can I repair my Worcester Bosch central heating Combi boiler HF 400?

My Worcester bosch HF400 Combi boiler works with Domestic hot water but when central heating is selected there... [Read more]

Worcester Bosch Highflow 400 Gas Boiler?

Hi Wonder if anyone can help. My WB HF400 boiler occassionally starts 'clicking' repeatedly. When I look at t... [Read more]

How can I get veirfy my radiators are operating properly?

MY Worcestero Bosch high flow 400 had not been working for the past month. Recently the Heat exchanger and pu... [Read more]

How do I remove the top cover from Worcester Bosch Highflow 400?

Something is leaking, I can hear the dripping, and yes there is water seeping down to the kitchen below. I ... [Read more]

my worcester bosch Highflow 400 will not ignite?

my worcester bosch Highflow 400 will not ignite.

bosch highflow 400 making loud hissing noise?

my boiler is making a loud hissing noise and the pump is very hot and it cuts out when heating or hot water is... [Read more]

how do I increase the pressure on worcester bosch highflow 400 combi boiler?

I have a worcester bosch highflow 400 combi boiler, about 14 years old. The hot water cuts in and out when the... [Read more]

any ideas what the fault is?

I have a Worcester Bosch Highflow 400 boiler. The hot water works fine, the problem is the central heating. Th... [Read more]

washing too hot to take out of washing machine + Why?

My Bosch washing machine has developed a problem. When I use my normal 40 degree wash with a spin of 400 when... [Read more]

Worcester Bosch High Flow 400 Safety Temperature Limiter?

Why do the Safety Temp Limiter keep tripping when CH & hot water switch on & running hot water to fill bath

how can i fix my boiler?

the boiler fires up ok but when i turn the c/h on it turns of after about 10 mins. boiler is worcester bo... [Read more]

Add water to sealed Worcester Bosch Highflow 400 combi boiler?

As the sealed system does not have an expansion tank, we are looking for a screw to turn 90 degrees to let wat... [Read more]

How do I fill the system with water?

I have a worcester bosch 400, I was looking for the filling loop but could not see one, as the pressure guage ... [Read more]

I have a water leak from my Worcester Bosch 400 Highflow electronic?

Water is leaking from somewhere inside the boiler housing,running out underneath. I can hear a dripping noise... [Read more]