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I've been asked to fit a heat leak rad on a biomass boiler, in the technical drawings an item called a crossover is indicated between a first 't' on the flow from the boiler and returning to a last 't' on the return before the boiler.The cicuit already incorporates a auto bypass and is a fully...

Wonder if any one can help? I had a call to an Isar M03100 which had stopped working, I replaced the main pcb but noted that there was also water dripping from the lip seal on the plate to plate heat exhanger which I also fixed, boiler working fine..Then a few days later got a call to say boiler...

Dear all-can anyone help?I went to look at aWorcester 3.5 Highflow today which will work in central heating as long as hot water thermostat is off, but when the hot water thermostat is turned up the boiler stops firing. I have checked programmer I have changed the hot water with another I had...

Can any one let me know the nozzle size , pump pressure setting, c02 and shutter setting for a Certiken COH100 pool heater running with C2 kerosene, many thanks.

Can two system of combi boilers be linked to give a greater heat output to the central heating??, or would can you link two heat only boilers and use external pumps? The reason I ask is that I need to heat a space which needs 20kw of heat in its own right and is 12meters away from the boiler at...

I have a fault with a Vaillant GB242/1E turbomax combi ,it works fine in dhw and ch modes but occassionally stops running and the ignition energising light which looks like two upside down triangles flashes, if you then reset or turn off and on the boiler fires up ok, problem occurs in both...

I wonder if any one can help, I need advise on how to wire a vaillant Ecotec Plus 630 system boiler to a Honeywell Y plan so that the y plan switches the boiler on independantly from the permanent feed for the pump over run? The vaillant wiring diagram shows terminals 4 and 3 on the boiler as...