Does anybody know what causes the whistling on an ideal classic 40ff when the boiler is running, it doesn't matter whether the boiler is hot or cold it always whistles. Any ideas?
gas 4 you, when you say over gassed do you mean incorrect burner pressure or is it a faulty part like the gas valve or the injector? If the injector is the problem why do they wear or is it that they were too big from day 1.
gas 2 air, the case seals are all in good condition and seem to be doing their job.
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