What racer said. That's where I found mine. I was looking for it because it was acting funny, but I realized that it doesn't shut down entirely reliably unless you've bled all the air from all of the lines. Mine would continuously hum after I shut the water off at a faucet. FINALLY figured it out.
2011 Ford F350 Lariat
2016 Sandpiper 381RBOK with an extremely CRAPPY A/C!!!
Nights Camped: 2010 = 14/11 = 27/12 = 13/13 = 10/14 = 30/15 = 47/16 = 30/17 = 21/18 = 11