Is your Sub-Zero ready for a Chicago summer? The jump from spring to full summer heat can happen quickly in Lincoln Park, and your refrigerator feels the difference just as much as you do.
When ambient temperatures in your kitchen climb above 80 degrees -- common in older Lincoln Park brownstones and greystone buildings without central air -- your Sub-Zero compressor works harder and longer to maintain set temperatures. Here is how to prepare.
Clean the Condenser Coils
This is the single most impactful maintenance task you can do. Condenser coils collect dust, pet hair, and kitchen grease over time. Dirty coils force the compressor to work harder, which increases energy consumption and shortens the compressor lifespan. Clean them at least twice a year, and always before summer.
Check Door Seals
Run your hand along the door gaskets while the door is closed. If you feel any cold air escaping, the seal needs attention. Even a small gap makes your unit work significantly harder during hot weather. Look for any cracks, tears, or areas where the gasket has pulled away from the door.
Verify Temperature Settings
Do not adjust your temperature settings down during summer. Your Sub-Zero is designed to maintain consistent temperatures regardless of ambient conditions. If the unit cannot maintain the set temperature, that indicates a problem that needs professional attention.
Ensure Proper Ventilation
Sub-Zero units need clearance around the sides and top for proper airflow. Check that nothing has been pushed against the unit, and make sure the ventilation grille is not blocked by dust or kitchen items.
Ice Maker Attention
Summer means higher ice demand. Check that the water supply line is secure and that the ice maker is producing clear, properly sized cubes. Cloudy or small ice cubes often indicate a water filter that needs replacement or a supply line issue.
When to Call a Professional
If your Sub-Zero is running constantly, making unusual noises, or cannot maintain temperature during warm weather, do not wait. These issues tend to get worse quickly in summer heat. A tune-up visit before the hottest months can prevent an emergency breakdown during a July heatwave.