Dad-in-law has b & q Silver Star combi LS100T - ch works perfect until turns on taps and water is warm for 30 secs & cuts out - pressure drops in system but water pressure 1.2, so any ideas? 
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problem with B&Q Silver Star Combi LS100T
- Thread starter samwilliams
- Start date
If you are saying that the flow rate at the tap drops, then the symptons you describe are that of a scaled plate heat exchanger, assuming this boiler has one(I've not come across it before). Or worst case scenario its a scaled dual pass main heat exchanger.
Thanks, could very well be in this heavy limescal area - hubby took out an overflow pipe that was totally scaled up - sent it to the Uni for their course!
Haven't seen the instructions so not sure if has heat plate or not
An overflow pipe on a combi???
reckon its the Ravenheat boiler, plate exchanger, worth trying to clean before replace.
sounds like its the little star ravenheat boiler LS100T and it does have a plate heat exchanger , but if you are in a bad area for limescale i would have a look at the filter in the giannani diverter valve its on the d h w output from the valve into the plate heat exch,m i bet its blocked up just isolate the water in and undo the half inch nut to the valve and pull the pipe away a small amount the filter will drop out clean and re fitIf the plate heat exch is blocked a good tip is if you have a Wilkinson store in your area get some decking /patio cleaner and soak it for 20mins it will clean it out that tip was direct from ravenheat top man on a course i attended a couple of weeks ago
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