hi there hope somebody can help. I recently took out an oil fired rayburn and replaced it with stovax stockton8 with back boiler(multi fuel). All works fine at low temp but when I raise the temp of the stove there is a loud banging coming from the back boiler . I havent changed the layout of the pipework and never had any of these noises with the rayburn.PLEEEEEAAAASE HELP ME!!!!!!!!
