Air Conditioner Not Cooling Greater Vancouver

When a Greater Vancouver home air conditioner runs but fails to cool, the cause is almost always a refrigerant, airflow, or electrical issue — each with a different service requirement.

What This Means

An air conditioner cools by passing warm indoor air over a cold evaporator coil, absorbing heat, and rejecting it outside via the condenser. When cooling fails, one of these three functions — refrigerant circulation, indoor airflow, or outdoor heat rejection — is compromised.

Common Causes

• Refrigerant low — insufficient charge reduces cooling capacity
• Filter dirty — restricted airflow prevents adequate heat absorption
• Condenser coil dirty — outdoor unit cannot reject heat to the hot summer air
• Compressor not running — no refrigerant circulation
• Outdoor fan not running — heat builds up in the condenser
• Thermostat set to fan-only or incorrect mode

What Homeowners Can Check Safely

• Check thermostat — confirm COOL mode with setpoint below room temperature
• Replace indoor filter if it has not been changed in the past 3 months
• Check that the outdoor unit fan is running — the large fan at the top of the unit should be spinning

When to Call a Licensed Technician

Air conditioning and mini-split systems contain refrigerant under pressure and electrical components at line voltage. Do not open refrigerant circuits, attempt to recharge the system, or bypass safety controls — these require a certified technician.

• Refrigerant pressure testing and recharge if low
• Condenser coil cleaning
• Capacitor testing — a failed capacitor prevents compressor or fan motor from starting
• Compressor electrical testing

Frequently Asked Questions

Why is my house not cooling even though the AC is running?

If the AC runs but the house does not cool, one of the following is most likely: refrigerant is low (gradual capacity loss from a slow leak), the condenser is dirty and cannot reject heat outside in summer temperatures, the filter is severely clogged, or the compressor is running but not at full capacity. A technician can narrow this down with a refrigerant pressure test and a visual inspection in one visit.

How do I tell if my AC condenser is the problem?

Stand near the outdoor unit while the AC is running. The fan at the top should be spinning and blowing warm air upward. Place your hand 30 cm above the unit — the air should be noticeably warm (it is rejecting heat from the house). If the air is not warm, the unit is not transferring heat effectively — a dirty coil or low refrigerant is likely.

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