We are looking into purchasing our first PUP, a 2004 Coleman/Fleetwood Sedona. We are new to the 3 Way Fridge and we want to make sure the fridge works. Am I correct that we will not be able to hear the compressor coming on? Instead we will have to wait until/if it cools? Can you pass on any information that I can do/check to make sure it works properly? Thank you!