KeystoneVR1frontkitchenhow to winterize?Can I do it without an aircompressor

Question edited for clarity - two/to
Question moved to RVs.

Videos tend to be generic, but the steps are the same on all RVs, remove water from anywhere that can freeze..

https://www.google.com/search?q=steps+to+winterize+Winnebago+26RK+Travel+Trailer

and de-winterize

https://www.google.com/search?q=steps+to+de-winterize+Winnebago+26RK+Travel+Trailer

..

videos and articles

https://www.google.com/search?q=winterize+2015+Forest+River+Wildwood+26TBS&

..

Here are some troubleshooting steps you can try to resolve the problem:
1. Check the Water Pump:
- Make sure the water pump is turned on and functioning correctly. The water pump is responsible for drawing fresh water into the holding tank from an external source.
- Check for any visible signs of damage or blockages in the water pump system.
2. Verify the Tank Fill Valve Position:
- Ensure that the tank fill valve is in the correct position to allow water to flow into the holding tank. The valve may need to be switched from the city water connection to the tank fill position.
3. Inspect the Water Inlet:
- Check the water inlet connection where you fill the fresh water tank. Make sure there are no obstructions or kinks in the hose that could be preventing water from entering the tank.
- If there is a water filter in the system, check if it is clogged and needs to be replaced or cleaned.
4. Test the Gravity Fill System:
- If your RV has a gravity fill system for the fresh water tank, try filling the tank using this method. Pour water directly into the gravity fill port and monitor the tank level to see if the water is entering the tank.
5. Consult the RV Manual:
- Refer to the owner's manual of your Coachmen Elite RV for specific instructions on filling the fresh water tank and troubleshooting water system issues.
I good luck

Maybe because it's supposed to. From Webasto

Why an Air Heater?

Comfortable warmth in the driver's cabin during breaks and overnight stay. A cab that is cosy warm even before starting work, a clear view without ice and snow - and all that with easy installation and handling. Air heaters make your vehicles more comfortable, efficient and cost-effective, fit for the winter!

are you draining for the winter? there should be a bypass valve by the water pump to drain.

Pull bottom plug out of hot water heater tank let all water drain. Then open all water tank drain valves and be sure your RV is tilted so it will drain towards the valve. Go in RV access water heater valves put it in bypass so no antifreeze can enter water heater tank. Pump RV antifreeze with hose provided into all water lines throughout RV by turning on your main water pump after you have stuck the bypass hose in a new and full antifreeze bottle, then flush toilet until red antifreeze comes out. Open all faucets one at a time until red antifreeze comes out. I use 3 gal but some only use one, the more the better it’s cheap at Walmart. Don’t forget to run outside shower until red antifreeze comes out also, very important or it will crack in the cold. Finally make sure black and grey tanks are empty and flushed at your last camp trip before winterizing. Pour antifreeze in toilet and all drains making sure first that black and grey tank shut off valves are pushed in and closed. Get a quality cover and store RV, it makes a huge difference on protecting roof and roofs lap sealant! All RV antifreeze is non toxic and you just drain it all at your first camp stop after winter! Note: don’t forget to put water heater ionizer drain plug back in wrapped with new white Teflon tape and take water heater valves out of bypass! Draw a diagram of regular mode and winter bypass mode so you don’t forget especially hot and cold water heater blender valve between the two MUST be shut off after you unwinterize
or you will cool your hot water unwanted and have no hot water to use! Happy Camping folks!

De winterizing is easy. They use a pink antifreeze which is food grade. Make surer the water heater is not by-passed. This is sometimes done using furnished bypass valves so that less antifreeze is needed. You can flip the water heater pressure release after connecting to city water. Water will come out if it is full. Do NOT turn on the water heater until you are certain the tank is full of water so as not to burn out the element. (This is true every time you set up) Run all faucets until you no longer see pink and you are de winterized.

Maybe you need to prime your suction pump.

Easy. Find your clean water pump and add a diversion switch. Put the end into the RV antifreeze turn your pump on and suck the gallon out. Be sure to close your resivor to your clean water holding tank. Won't take much if u do that!

You don't need to find the water pump. Make sure your water tank is empty before adding RV winterizer to the water tank. Run each faucet in the RV with bypass valve NOT in winterize position until you see the antifreeze begin to come out of the faucet. Do this for both cold and hot water side for each faucet. Then move bypass valve to winterize position and run for a few seconds.