Baxi HE 133 - Problem with boiler or not??

[rossobonks]

Hi

My Baxi HE 133 is working fine with great hot water flow and problem free central heating. How ever we have just upgraded to a new bathroom suite and installed an en suite room. Since installing the new bathroom products the boiler now fires up for a brief moment ( 2-3 seconds) in DHW mode when I open the cold water taps or flush the toilet. I guess there is some sort of pressure change within the boiler which makes it think I am demanding hot water but it is when I use any of the cold water outlets? The boiler is now so sensitive that it fires up for a brief moment even when the house next door uses any of there cold water outlets. So you could imagine how many times in a day the boiler is coming on and going off!

Otherwise the system works fine and produces a faultless hot water system when called for.

1. Could this be a problem with the boiler?

2. Could it have anything to do with the thermostatic shower valves I have installed?

3. Is there some sort of pressure flow valve which can be installed to stop the boiler doing this.

Any help very much appreciated

Dave

 

[lor]

seems obvious to me it is to do with his work , possibly a dead leg or cross flow
call him back to check

 

[Agile]

Turn off the COLD feed valve under the boiler and see if any water comes out of any hot tap!

Could also be a faulty mixer tap, probably because the non return valves have been left out!

Was your installer a member of the Institute? They have a complaints procedure if he does not remedy his defects!

Tony