I picked up a couple used Chauvet RGB Geysers. One has developed a clogged heater... oddly enough, this happened while I was running through a 50/50 Distilled Water/White Vinegar cleaning cycle.
I took the unit apart and verified there were no clogs leading up to the inlet of the heater. I also verified the pump was working.
I tried running a guitar string (tried E, A and D) through the heater, but it appears the path takes a lot of twists and turns. I ran the string into the inlet about 18" or so before I got scared of breaking it off inside the heater. It never did make it all the way through.
I tried tried forcing air, water, and vinegar into the inlet with a squeeze bulb, but never got it to come out of the outlet.
So far, none of this has improved the situation.
The last thing for me to try (that I can think of) is what was mentioned here- to use CLR. I pickup up some CLR, but it states on the bottle "Do not use on steam machines". For those of you who have used CLR with success, have you had any problems? Is there anything else worth trying?