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10 Oct

The ultimate guide to winterizing your air conditioner

As temperatures start to drop, it’s important to properly winterize your air conditioner to save money and prevent costly repairs. 

This comprehensive guide will walk you through everything you need to know about preparing your AC for the colder months.

Why winterize your air conditioner?

There are a few key reasons why you should winterize your AC unit:

  • Prevent damage from cold weather: Running your AC in freezing temperatures can damage the compressor and other vital components. Shutting the unit down will protect it.
  • Save money: A sealed, winterized AC unit loses less cold air and runs more efficiently when it returns to service next spring or summer, saving you money on energy bills. 
  • Prolong your AC’s lifespan: Allowing moisture or ice buildup puts unnecessary strain on parts like the condenser, evaporator coil and drainage systems. This shortens the unit’s lifespan.
  • Prevent repairs: Issues like refrigerant leaks, electrical shorts and weather corrosion can be costly to fix. Maintenance and winterizing helps avoid those repairs.

Step-by-step: How to winterize your AC unit

You can winterize your air conditioner properly in just a few simple steps:

Clean the AC filters

Thoroughly clean and dry your unit’s filters to improve airflow and efficiency. Consider having backup filters on hand for spring.

Trim back foliage

Prune any branches or shrubs growing around your outdoor AC condenser unit to allow maximum airflow and sunlight exposure.

Install a weatherproof cover

Protect your external condenser unit with a weatherproof cover specifically sized for AC units. Make sure it still allows ventilation.

Drain excess moisture

Inspect the condenser pans and drainage tubes to ensure they are clear of debris so defrosted water can drain properly.

Disconnect the power supply

Switch off the power supply to your AC unit at the breaker box to prevent it from accidentally turning on when temperatures rise.

Schedule seasonal maintenance

While DIY winterizing can save money, it’s best to have an HVAC professional check your system before it gets turned on in the spring or summer.

Call the Experts

Call HVAC 911 to speak with one of our affiliated contractors in your area. They are experienced in winterizing air conditioners and performing yearly maintenance on those units. 

HVAC 911 is a referral service affiliated with the best local licensed, bonded and insured plumbing contractors in the area. They employ highly qualified plumbers who receive over 10,000 hours of training and undergo rigorous background checks.