Winterizing your RV is a necessary thing to do to keep it safe for the off season; one of the final big parts to winterize is the rooftop air conditioner. If you fail to prepare your AC, freezing temperatures, snow, and ice can damage it. But proper winterization protects the unit and can also help the unit live longer and run more efficiently the next time you use it. In this guide however, we will take things step by step and show you how to winterize your RV rooftop air conditioner properly.
Your RV’s rooftop air conditioner is designed to keep you cool in the heat of summer, but not extreme cold. As the temperatures cool, the moisture inside your AC unit can lead to a number of problems, such as rust and freezing as well as far worse issues with the internal components. Winterizing the AC helps your unit stay in good condition for as long as it doesn’t get warm again.
Always ensure to turn off the power to the RV’s electrical system before attempting any work on your air conditioner. Unplug the battery to prevent any electric problems while working on the A/C system. This step is important for your own safety and avoids accidental power surges or electrical shorts.
Make sure you thoroughly clean your rooftop air conditioner before it goes into winter storage. Over the course of the season, dirt, leaves, and debris can build up on the unit which could create clogs or restrictions to airflow. Here’s how you can clean it:
Wash the Filter: Take out the air filters and wash them with warm, soapy water. Ensure they are completely dry prior to replacing them back in the unit. A soiled filter will waste energy, and cause airflow problems when the system switched once more.
Clean the Coils: Vacuum with a soft brush or nozzle to clean the evaporator and condenser coils. These coils can get dusty, dirty, or moldy, and this can harm the AC unit and decrease its cooling ability. You can either use a AC coil cleaner or a solution of mild detergent and water.
Inspect (not hit) the Drainage System: Look at the drainage tubes, even hit them and then check if they are not blocked. During the winter seasons, this can lead to water damage if the drainage system is clogged.
Check for Leaks, Cracks and Damage to Your AC Unit Before you start the winterization process make sure to thoroughly inspect your AC unit for any signs of leaks, cracks, or damage. Check for cracks on the seals surrounding the air conditioner and the mounts. If you notice any issues, fix them before you store the unit for the season to avoid doing more damage.
The first and foremost step is to protect your RV rooftop air conditioner from the elements during winterization. To prevent this, use a sturdy RV AC cover to protect the unit from snow, rain, ice, and debris. The cover should fit tightly to keep moisture out of the unit that can cause rust or freezing.
Air conditioner covers designed for RVs can be found at RV supply stores and online. They are usually constructed from robust, weather-proof materials such as vinyl or polyester, and they usually feature straps or elastic edges to ensure a snug fit.
Do not cover your AC with plastic tarps; these do not breathe. Moisture can get caught under plastic which can lead to mold or damage to the unit.
Now you’ll want to seal off the vents inside the RV to further protect the air conditioning system. Use weather stripping or foam tape to seal the vent openings, helping to stop cold air from coming inside the RV and warm air from escaping. Doing this will also keep moisture from building up inside the unit to potentially grow mold or mildew.
Your RV roof will be exposed to the elements, and the seal around your rooftop air conditioner can break down over time. Make sure you check the roof seals for any cracks or gaps before you store your RV for winter—and reapply as needed. This prevents water from pouring into the air conditioner during rain or snowstorms, which could cause internal damage.
Reseal the AC Unit You can reapply the seals around the AC unit using a silicone-based RV roof sealant. Follow the manufacturer’s directions when applying sealant to ensure it is watertight.
Check the air conditioner’s condenser and evaporator coils before winterizing. If you find the coils to be dirty or clogged, clean them with an air compressor or a soft brush. Dust buildup can impede the unit’s efficiency and make it work harder when you fire it up in spring.
Be gentle, though, the coils are delicate and easily broken.
Winterizing your RV rooftop air conditioner is a crucial step to ensure that it remains in good condition throughout the off-season. By following these steps, including cleaning the unit, covering it securely, sealing vents, and checking for damage, you can protect your AC system from freezing temperatures and potential damage. When the warmer months return, your AC unit will be ready to provide cool, refreshing air to keep you comfortable during your RV adventures.
