Alliance Coach to the rescue!
Alliance Coach in Wildwood, Florida has saved the day for my wife and I. We have been fighting a zone 1 Hydro Hot problem since we bought the coach from Colton RV in Buffalo, NY last March. Zone 1 would just blow cold air. Colton replaced the circulation pump, one way valve, and ultimately (about a month ago) a plugged heat exchanger. Still did not work. They ultimately sent me to Alliance.
What we found was a second plugged heat exchanger (the fluid was very old and causing lots of crystallization) and an air locked system. Alliance was able to unplug the plugged heat exchanger (lots of compressed air, then a good flush with water) and flushed the old fluid out of the entire system, dumping the boiler twice before the fluid was clean, then totally filled the system with new fluid.
It works great! Thank you Alliance Coach!
FMCA #F431170, GS #822128658, Escapees SKP #112655
2012 Airstream Mercedes Interstate Class B