As a Texas A/C contractor I can tell you that RV systems are not profitable to work on because all of the parts are proprietary, and the distributers only give about a 10% discount to repair companies. Doesn't make sense to cary around a bunch of specialized
parts that MIGHT make you 10% when you can cary generic parts that you can turn on a regular basis and double your money. Units are actually quite simple. Distributer wants to sell you another one.
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