For all concerned,
I am a Factory Certified Tech. Aqua-Hot has always responded in a timely manner. Don Quantana (Telephone Tech) with several years experience as a factory tech. If he cannot solve your problems, no one can. (The phones do get busy at times.)
I have just installed one of the new electronic coolant level switches in my own Hydro-Hot.( I have to be able to say "Yeah, they work")
It is fairly easy install, Probably 1 1/2 -2.0 for most people with a little knowledge.
By the way, If Aqua-Hot cannot be reached After hours or Week Ends. Please feel free to call or email me, I don't close on weekends.
Orman Claxton
206 660 9893
Ocroadhouse@yahoo.com.