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We have 37 questions about mending 'bosch 400'

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Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

worcester 400?

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

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]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

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]
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my worcester bosch Highflow 400 will not ignite?

my worcester bosch Highflow 400 will not ignite.
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

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]
Mend Household Appliances, Washing Machines

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]
Mend Heating, Home Heating Systems

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
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

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]
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