Recent content by DavidStewart22

Thanks Chris. Almost everyone I have discussed this subject with agrees that it is indicative of sludge or scale and it makes sense. My own boss (an expert like yourself and very experienced) agrees with your comments. However, since I cleaned out the system 1 year ago using a 3 step process...

Thanks Chris. Forgive my ignorance, but what would bring about an increase in temperature to cause this problem which only started a last week. Any detail would be appreciated as I would like to understand the problem and solution. Thanks again. This has been doing my head in.

My Sigma 40 make a humming noise not unlike an airplane passing overhead. It is not electrical, it is not the fan. It comes from the heat exchanger section and only while the gravity heat transfer is working to heat up the water tank. When the radiator heating pump is on it is fine. C Could...