Key Takeaways:
- Know how to winterize an AC unit so the unit stays safe on cold days
- Use a mesh cover only and keep the space clean
- Do not let ice or snow sit near the unit
- A small winter check each month can stop big damage. Call Dript Plumbing for help.
Cold winter nights can turn a simple air conditioner into a costly problem. If you skip winter care, your AC can rust or freeze just when you need it most. That risk can mean high repair bills or even a full unit replacement.
To winterize an AC unit, you must shut off the power, clean debris, drain water, and if you use a cover, make sure it is breathable and does not trap moisture.
In Canada, 2025 data shows that about 68 % of households own some kind of air conditioner or cooling equipment. That means many people rely on ACs to stay cool in summer, so keeping that unit safe in winter is smart.
The Do’s: How to Winterize an AC Unit the Right Way
Here is what you need to do.
1. Shut Off the Power Supply
You must stop all power before winter sets in. This keeps the unit safe. It stops suddenly and starts in cold days. Sudden starts can harm the motor and the fan.
Go to the outdoor switch near the AC, turn the switch down, and make sure the power is off. And double-check your work. This is the first step in how to winterize an AC unit the right way.
2. Clean the Exterior and Remove Debris
Dirt and leaves can hold water, freeze in the winter, and harm the AC. That’s why cleaning the top and the area around the unit, including the base, is important to ensure the unit is clean.
A clean space keeps pests away, as pests love dark, warm spots. A clean unit stays dry and safe from pests. This step protects the fan and the coil from damage as well.
If you want more tips, you can read our guide on heat pump issues in cold days.
3. Insulate Exposed Pipes
Cold days can freeze pipes, frozen pipes can crack, and cracked pipes can leak. Insulation keeps the pipe warm, and foam pipe covers work well for insulation.
Good pipe care stops heat loss and keeps the coil safe. This is a key step in how to protect an air conditioner in the winter.
4. Use a Breathable Cover Only If Needed
Many homeowners ask Should you cover your air conditioner in the winter. The answer is yes if your area gets ice or snow. You must use a breathable cover only. A cover with air flow stops moisture because moisture is the main cause of rust.
Do not use a plastic cover, it traps water and causes mold. Water also pulls pests to the unit. A soft mesh cover works best if you want to cover air conditioner in winter.
The Don’ts: Common Mistakes to Avoid
Here is what you should refrain from doing.
Do Not Use Plastic Covers or Tight Covers
A plastic cover holds water. Water can sit inside the unit and freeze on cold days. Ice can harm the coil and the fan. A tight cover also traps wet air, which can cause mold and rust. It can also pull pests to the unit because pests like warm, dark spots.
Use a soft cover if you need one. Make sure air can move out with ease.
2. Do Not Skip a Pre-Winter Check
Many people forget this step. A quick check can save your AC. Look at the coil, wires, and the drain line. Make sure all parts look clean, and you see no loose parts.
This small step helps spot trouble early. It also keeps the unit safe in cold days.
3. Do Not Leave the Area Around the AC Messy
Grass, leaves, and small branches can hold water, which can freeze and harm the unit. A messy space can also pull pests near the AC.
Keep the space clean and keep the base clear. A clean space helps the unit stay dry.
4. Do Not Skip Mid-Winter Checks
Cold days can change fast. Snow can pile up near the AC, and ice can form on the top. A small check each month keeps the unit safe.
Look for snow and ice around the unit and clear both with care. This step helps you spot harm before it grows.
Should You Cover Your Air Conditioner in the Winter
Many people ask if you should cover your air conditioner in the winter. The simple answer is yes in some homes, but not in all homes. A cover can help if you get heavy snow or ice. A light cloth cover keeps leaves out. It also keeps small twigs out. It keeps dust out, too. This keeps the unit clean when cold days hit.
How Do You Protect an Air Conditioner in the Winter
These steps keep the unit safe on cold days.
- Turn off the power at the switch
- Clean the top and the base
- Clear all leaves near the unit
- Use pipe foam to guard the lines
- Use a soft mesh cover if the snow is high
- Check the unit each month
- Clear ice if you see it build up
These steps keep the AC safe till spring. They also help the unit last more years.
Professional Help: When to Call a Technician
Dript Plumbing can help with winter prep. Our team knows how to test each part. We know common winter faults in many homes. A quick visit keeps your AC safe for the full season. Call us to schedule a consultation.
FAQs
Should I cover the AC unit in winter
Yes, you can cover the AC if snow is high or if ice forms fast in your area. Never use a plastic cover because plastic holds water.
What happens if you do not winterize your AC?
Your AC can freeze, and water can drip from the base, which can break small parts. Dirt can also build up on cold days. All this can lead to high repair costs.