I have just installed a saunier duval f35 e combi boiler a fortnight ago,when the boiler is on there is a constant whining noise coming from it very high pitched, i took the panel of the front of the burner and checked inside it seems the noise is coming from the heat resistant panels that sit around the burner, right on top of these panels sits the heat exchanger. When you slightly move the panels about you can get it to stop but as soon as you put the front panel in front of the burner back on the noise returns. Any ideas on how to get it to stop. Engineer says it just the running noise of the boiler. But for a brand boiler its not very good. Thanks.