Sub-Zero Troubleshooting Guide
Fix It or Call a Pro? Simple checks you can perform before scheduling a service call in Walnut Creek.
A Quick Step-by-Step Checklist
Before picking up the phone, running through these simple checks can sometimes resolve common issues or help our technicians diagnose the problem faster when you call. This guide is perfect for homeowners in Heather Farm or Saranap looking for a quick fix.
- Check the Power: Is the unit plugged in securely? Check your circuit breaker to ensure it hasn't tripped.
- Inspect the Door Seals: Clean the rubber gaskets around the door with warm, soapy water. Ensure they are making a complete seal and are free of cracks or tears. A poor seal is a common cause of cooling problems.
- Verify the Temperature Settings: Check the control panel. Has the temperature been accidentally changed? The ideal setting is typically 0°F (-18°C) for the freezer and 37°F (3°C) for the refrigerator.
- Listen for the Compressor: Can you hear a low humming or buzzing sound? If the unit is completely silent, it could indicate a power or compressor issue.
- Clear the Vents: Make sure air vents inside the refrigerator and freezer compartments are not blocked by food containers. Proper airflow is crucial for cooling.
Common Symptoms and What to Try
| Symptom | Possible Cause | Try This First |
|---|---|---|
| Fridge is warm, freezer is fine | Blocked airflow, faulty evaporator fan, or damper control issue. | Check that vents between the sections are not blocked by food items. Listen for the evaporator fan running inside. |
| Excessive frost in freezer | Door not sealing properly, faulty defrost system, or high humidity. | Wipe the door gasket with a damp cloth and ensure it makes full contact. Check for any gaps. Limit how long the door is open. |
| Water leaking on floor | Clogged or frozen defrost drain, or a cracked water line for the ice maker. | Safely unplug the unit and check the drain pan underneath. If the leak is from a supply line, shut off the water to the unit. |
3 Common Traps for DIY Repairs
1. Improper Defrosting
Using a hairdryer or sharp objects to speed up defrosting can damage sensitive coils and plastic liners, leading to a much more expensive repair.
2. Overtightening Door Hinges
Trying to fix a sagging door without proper alignment techniques can strip the hinge screws or warp the door, making the seal even worse.
3. Ignoring the Condenser Coils
The most common DIY attempt is cleaning inside, but the most critical part to clean is the condenser coil, usually located at the top or bottom of the unit. Neglecting this leads to overheating.
When You Absolutely Need to Call a Pro
While DIY checks are helpful, some symptoms are clear signs that you need professional help immediately. Do not attempt to fix these yourself:
- Any chemical or burning smell.
- Loud grinding, banging, or squealing noises.
- The refrigerator or freezer temperature continues to rise after your checks.
- Any error code is flashing on the display.
- The compressor is very hot to the touch.
Tried It All and Still Stuck?
You've done your part. Now let our experienced technicians take over and get it fixed right.