Water Pump

You don't say how long you let it run, but I just finished my first dewinterization and was surprised at how long it took the pump to come up to pressure. It might have been 10-15 minutes.

Wow..., okay. I'm starting it again. We'll see. I never dreamed it would take that long.

I think the 180 has it in the same place as the 179. If so, the winterizing valve is under the bed, at the end closest to the front-left of the trailer (looking from back to front). You will need to remove the mattress and the bed platform to get to it. You will see the pump and a valve. There will be a section of hose attached to the valve. This is used to suck RV antifreeze into the system. The valve changes it from the winterizing hose to pulling water from the tank.

When we first got ours, the dealer had not changed the valve so it was pulling air. I could not figure out why it was not pumping water. I finally did the above procedure and saw the valve. Once I changed it over, it started pulling water from the tank.

Now, if you saw your fresh water drop from full (4 LED lights) to 2 (1/3 full), then it sounds like it is pulling water. Is there the sound of water anywhere while you are running the pump? Check your outside shower as well as all faucets inside. As pointed out, the water heater will take 6 gallons to fill. The water lines will take another gallon or so. It might be taking that much to fill the system with water.

I hope you get it figured out. If the faucets are all closed and the pump continues to run, start checking all water line connections. Look for leaks as something might not have been tightened fully and you may be spraying water inside a cabinet somewhere.

Those darn pumps. They do exactly as designed! 

I am glad that it was the outside shower and not water spraying around inside a cabinet. Chalk it up to a learning experience. I've had lots of those.