7 signs your air conditioner needs repair before summer

Most air conditioners don't fail without warning. In the weeks before a breakdown they usually give clear signals — and catching them early can turn a $3,000 replacement into a $150 repair. Here are the seven signs our technicians see most often.

1. Warm air from the vents

Often a refrigerant leak or a failing compressor — both get worse quickly.

2. Short cycling

The system turns on and off every few minutes, wearing out parts and wasting energy.

3. Unusual noises

Grinding, squealing or banging usually points to a loose or worn component.

4. Water around the indoor unit

A blocked condensate line can damage floors and ceilings.

5. Rising energy bills

A sudden jump with the same usage means the system is struggling.

6. Weak airflow

Dirty filters, blocked ducts or a failing blower motor.

7. Bad smells

Musty odours suggest mould; burning smells need immediate attention.

“Nine out of ten emergency calls we get in July could have been a routine visit in April.”

What you can check yourself

• Replace or clean the filter every 1–3 months.
• Keep 2 feet of clear space around the outdoor unit.
• Make sure supply and return vents aren't blocked by furniture.

Anything beyond that — refrigerant, electrical components, motors — should be handled by a licensed technician. If you've noticed one of these signs, book a diagnostic visit before the first heatwave.