Bosch Worcester Boiler Problem. Please Help.

[pudha]

Hi guys,

I have a Bosch Worcester Greenstar 28i Combi Mk III boiler and experiencing heating related problems. We installed this a few months ago. It was working fine until a few days ago.

The central heating system (connected to the boiler) cuts out quite regularly.

The Bosch engineer inspected it today and concluded we have a hot water pipe leak somewhere, as the water pressure is giving out 3 litres of water per minute (with all taps off and heating thermostat turned to full) with no usage of the water supply indoors.

He told us to replace the hot water pipes throughout the house and assured us the problem does not lie within the boiler.

How can we confirm where the leak is?

Any help would be great.

Thanks

 

[Andygasman2010]

So basically, the boiler thinks a tap is on and so cuts out the heating to bring on the hot water?

You can prove this by just turning off the cold mains and it should then stay on (the Worcester guy probably already did this)

To find out where it is can be very difficult. Follow the pipe from the boiler and cap it off at every branch as you go and try it.

If it's all hidden and under concrete you're pretty much knackard. You could maybe try someone like Munters and trace it with specialist equipment but this could be expensive.

 

[Agile]

As it was not a boiler fault did they charge for the visit?

Often such a big leak will be creating dampness and smells.

But under concrete it can just soak into the ground without any obvious effect.

Just sometimes it can be traced using an infra red thermometer.

Tony

 

[pudha]

Thanks for your responses guys

Basically, when the water is off, the heating thermostat full, the boiler is pushing out that much water. But the radiators do not heat up. He's confused as to why its pushing out 3L of water.

His answer was to replace the hot water pipe only throughout the house and block the old pipe.

I don't want to dig up my house to locate this problem.

How would the infrared thermometer method work?

 

[Andygasman2010]

Basically, when the water is off, the heating thermostat full, the boiler is pushing out that much water. But the radiators do not heat up. He's confused as to why its pushing out 3L of water.

You've confused me a little here, you said in your original post that he told you to replace the hot water pipes, do you mean the central heating pipes that feed the radiators? Or the mains pipes that feed the hot water taps?