I have been advised that I may need to have a new diaphragm fitted on a Britony gas boiler. The burner doesnt always ignite and I usually have to open the tap fully before it ignites and heats the water.
Does anyone know how much a diaphragm is likely to cost and is it a difficult task for it to be fitted. I have an engineer calling later in the week to give me a quote - just looking for some rough pointers at this stage.
Thanks