Hi everyone, I have a Blazer plus that is not heating enough. It is a two stage using vacuum exhaust and engine exhaust. The engine heat exchanger gets hot but the water coming out is not. Could there be a possibility that the water is by passing somewhere between the vacuum heat exchanger and then bypassing the big heat exchanger and going out to the wand? I will descale it tomorrow to see if it improves but in case it does not what else could be causing the problem? Thank you in advanced.