AC Not Cooling? Troubleshooting Guide for Luxembourg Homeowners

AC Not Cooling? Try These Steps First

It's a hot summer day in Luxembourg and your AC is running but not cooling. Before you call a technician, try these troubleshooting steps.

Quick Fixes You Can Try

1. Check the thermostat — Make sure it's set to COOL mode, not FAN or HEAT
2. Check the remote batteries — Dead batteries = no communication with the unit
3. Clean the filters — Dusty filters restrict airflow and reduce cooling by up to 30%
4. Check the outdoor unit — Remove leaves, debris, or anything blocking airflow
5. Reset the system — Turn off at the breaker for 5 minutes, then restart

Still Not Cooling? Possible Causes

• Low refrigerant — A leak in the system (requires professional repair)
• Frozen evaporator coil — Usually caused by dirty filters or low refrigerant
• Faulty compressor — The most expensive component to replace
• Blocked condensate drain — Water backup can trigger a safety shutdown
• Electrical fault — Capacitor or contactor failure

When to Call a Professional

Call us if:

• The above steps didn't help
• You see ice on the indoor or outdoor unit
• The unit makes unusual noises
• There's water leaking from the indoor unit
• The system keeps shutting off

Repair Costs

• Refrigerant recharge: €150–€300
• Capacitor replacement: €100–€200
• Compressor replacement: €500–€1,500
• Full system diagnostic: €80 (deducted from repair cost)

Call +352 27 58 58 25 for AC repair — available 24/7.