Is there a recommended way to test for leaks in a Raypak 2100 heater? I have had several over the years (leaky drain plug on return side, loose connection on the pressure switch) but this time it is not so obvious. I suspect that it might be a leaky heat exchanger (ouch!) but maybe not.
What is the best way to find the **** thing? From the front panel, you can see very little, and the easily accessible side (the left) has an insulation blanket which is not real helpful either. Any of you pros have a clever way to spot the leaker and, if not, can you suggest a good vocabulary of swear words?