Prevent HVAC Failure in First High Heat Wave

Cost Savings

Checklist Tasks

• Vacuum condenser coils to prevent airflow blockages and compressor overheating.
• Tighten electrical connections to prevent voltage drops and burned-out components.
• Test thermostat cooling mode; recalibrate if readings differ by over 2°F.
• Inspect refrigerant line insulation for gaps or UV damage to prevent leaks.
• Flush condensate drain line with vinegar to avoid algae clogs and emergency shutdowns.
• Check for ice on evaporator coils after 15 minutes of operation to detect faults.
• Clean or replace return air filters with correct MERV rating per manufacturer specs.
• Ensure all supply and return vents are open for balanced airflow and reduced cycling.
• Lubricate blower or fan motor bearings if accessible to minimize friction and wear.
• Listen for startup buzzing or clicking, which can indicate failing capacitors or relays.
• Measure temperature difference between supply and return; outside 15–20°F suggests faults.
• Watch for utility peak demand alerts and pre-cool your home to ease system strain.