Air conditioners fail under load, on the hottest days, after sitting idle all winter. This spring checklist keeps small issues from becoming a miserable, expensive summer surprise.
The homeowner checklist
- Replace the air filter. Restricted airflow is the number-one cause of weak cooling and frozen coils.
- Clear the outdoor unit. Remove debris and trim plants back at least two feet so the condenser can breathe.
- Open and unblock vents. Make sure air can move freely through the home.
- Run an early test. On a mild day, confirm the system blows cold and cycles normally.
- Watch for ice or water. Both point to issues worth catching early.
What a professional tune-up adds
A technician cleans the coils (the quiet killer of AC efficiency), checks the refrigerant charge, inspects the capacitors and electrical connections that fail in summer heat, and verifies overall performance. A real tune-up prevents most mid-summer breakdowns.
Why it pays off
A clean, tuned AC uses less electricity to cool the same house and is far less likely to quit in a heat wave. Explore AC maintenance, or read our companion piece on whether an annual tune-up is worth it.
Frequently asked questions
When should I get my AC ready for summer?
In spring, before the first real heat. Testing and servicing early means you confirm it works and avoid the peak-season rush when everyone's AC fails at once.
What can I do myself to prep my AC?
Replace the filter, clear debris from the outdoor unit, open vents, and run an early test cycle. Coil cleaning, refrigerant, and electrical checks are for a technician.
Why is my AC not cooling well?
Often a clogged filter, a dirty outdoor unit, or blocked vents — all easy to check. If those are fine and it still won't cool, low refrigerant or a failing component may be the cause and needs a technician.