The last time we were out the front heat pump would not heat or cool. When we got home I made arrangement to take it to a RV shop. They spent an hour diagnosing the problem and said most likely lost it's Freon charge. Stated it was a closed system like a home refer and would have to be replaced to the tune of $1600.00.
I said I needed to digest that and went and picked up our MH.
Later that day I recalled a friend that has a beer keg cooler that would not cool any more and another friend/customer had gone to his house and fixed it.
So I called my friend/customer, Lance, and he came over got the unit uncovered and installed a tap into the system and began to recharge when he found the leak. It was on one of the capillary tubes which are very small.
Now to cut to the chase...He was able to silver braze the leak without plugging the tube and we were back in business all for a fraction of cost of replacing.
He also looked at the rear heat pump and found the same thing starting to happen. Bent the tube back a little and now that one should live a little longer.