How to De-Winterize Your RV in Spring

Every spring brings a little jolt of excitement when the air finally warms up and camping season is around the corner. But between that excitement and the first night back in the camper, there is an afternoon of de-winterizing that has to happen. Skip it, and you will be dealing with pink antifreeze in your morning coffee or discovering that a mouse made your furnace duct its winter home.

If this is your first spring with an RV, do not let the process intimidate you. De-winterizing is mostly about reversing what you did in the fall, flushing things out, and doing a careful walk-around before you load up and go. Here is exactly how to do it every year.

Step 1: Flush the Antifreeze Out of Your Water System

If you winterized with non-toxic RV antifreeze (the pink stuff), it is still sitting in your pipes, water heater, and faucets. You need to get all of it out before you use the water system.

Start by connecting your RV to a clean water source. Open every faucet one at a time, hot and cold, including the shower and the outdoor shower if you have one. Let each one run until the water is completely clear with no pink tint. Do not forget the toilet, flush it several times until it runs clear too.

Once all faucets run clear, close them and let the fresh water tank fill. Then run each faucet again for a minute to make sure everything tastes and smells clean. If you want extra peace of mind, add a water system sanitizer (a small amount of household bleach diluted in the tank works) and run it through the system, then flush it one more time with fresh water.

Step 2: Check All Plumbing Connections for Leaks

Freezing temperatures can crack fittings, loosen connections, and damage seals even if you winterized properly. With the water system pressurized, walk through the RV slowly and check every visible pipe, connection, and valve for drips.

Look under sinks, around the toilet base, behind the water heater panel, and at the water pump itself. A small drip now is much easier to fix than a flooded floor on your first trip out.

Step 3: Inspect Seals, Roof, and Exterior

Winter weather is hard on RV seals and caulking. Walk around the entire exterior and look at every seam, window seal, vent cover, and roof edge. Press on the sealant gently. If it cracks, pulls away, or feels brittle, it needs to be resealed before you drive through the first rainstorm.

Get on the roof if you can do so safely. Look for cracks around vents, the air conditioning unit, and any antennas or solar panels. Water intrusion through the roof is the most expensive RV problem you can have, and catching it early costs almost nothing to fix.

Step 4: Test All Systems Before You Leave

Do not wait until you arrive at a campground to discover that your furnace does not light or your fridge is not cooling. Test everything at home where you have time and resources to fix problems.

• Furnace: Turn it on and let it run a full cycle. Listen for normal ignition and airflow. Smell for anything burning off (a slight smell on first run is normal, a persistent burning smell is not).
• Water heater: Light it and verify it heats water within 20 to 30 minutes.
• Refrigerator: Turn it on at least 24 hours before your trip. RV fridges take longer to cool down than household ones, especially on propane.
• Air conditioning: Run it for at least 15 minutes. Check that it blows cold and drains condensation properly.
• Slideouts: Extend and retract them. Listen for grinding or unusual sounds. Lubricate the mechanisms if recommended by your manufacturer.
• Batteries: Check voltage. If your batteries sat all winter without a maintainer, they may need charging or replacement. Our battery comparison guide can help if you are considering an upgrade.

Step 5: Tires, Brakes, and Safety Equipment

Tires lose pressure over winter and the rubber can develop flat spots from sitting in one position for months. Check every tire's pressure against the rating on the sidewall. Inspect for cracks, bulges, or dry rot, especially if the tires are more than five years old.

Test your brakes before you get on the highway. If you have a trailer, connect it and test the brake controller. Check that all exterior lights work: brake lights, turn signals, running lights, and reverse lights.

Step 6: Stock Up and Head Out

Once everything checks out, restock your RV essentials. Replace any food that expired over winter, check that your first aid kit is current, make sure you have fresh propane, and top off any cleaning supplies. Then pick your first campground of the season, load up the family, and go make some new memories.