We have a Myson Kickspace heater in the kitchen which has never been particularly good at heating the kitchen. Recently we have noticed it does not seem to come on. I originally thought it may be the fan motor or the low temp switch. The fan motor is OK, so the next suspect was the low temp. switch, I switched the heating right up radiators and pipe work all blazing hot, still nothing on further investigation I noticed that neither the flow or return pipes were getting warm. I tried venting it and got a steady spray of water and also noticed the flow pipe got slightly warmer no change on the return. There are only two 1/4 turn shut off valves on flexible pipes both are fully open, this to me suggests the matrix may be clogged.

Has anyone with any experience of these things had similar problems? Are they prone to getting clogged? The last time I did any work on the heating system, it was flushed and inhibitor added and as I said the heater worked.

Richard