Whirlpool WRF555SDFZ05 Not Cooling — How to Diagnose and Fix the Problem
Need the replacement part? Search your model number at for guaranteed fit and fast free shipping.
Understanding the Problem
Owners of the Whirlpool WRF555SDFZ05 commonly report that the refrigerator compartment is warm while the freezer may be cold, or that neither compartment is cooling properly. Cooling problems can be caused by airflow issues, a failed evaporator fan, a defective start relay or compressor, iced-over evaporator coils (defrost failure), faulty sensors, or electronic control problems. Symptoms often develop gradually (reduced cooling) or suddenly (complete loss of cooling). Diagnosing the issue requires checking simple items first — vents and condenser coil cleanliness — then moving to functional components: evaporator fan, condenser fan, compressor and start components, defrost system, temperature sensors (thermistors), and the main control board/damper assembly. Always unplug the refrigerator before doing electrical testing or part replacement, and consult the model's wiring diagram or parts list for exact replacement part numbers.
Common Symptoms
Fridge compartment warm or not cold, freezer icing or excessively cold, unit runs constantly, louder-than-normal humming or clicking from the compressor area, frost buildup on inside back panel, or water under/behind the refrigerator.
Common Causes
- Blocked or dirty condenser coils reducing heat rejection
- Failed evaporator fan motor (no circulation from freezer to fridge)
- Defrost system failure (defrost heater, thermostat, or control) causing iced coil
- Bad start relay/overload or compressor starting problem
- Faulty thermistors or control board causing incorrect temperature regulation
- Damaged air damper assembly restricting airflow between freezer and refrigerator
Popular Parts That Fix This Problem
These are the most common replacement parts that fix this problem. When you're ready to order, click below to find the right part at PartsDiscount.com — just search by your appliance model number for a guaranteed fit.
Helpful Repair Tip
Start with two quick checks: 1) Listen at the back for the compressor running and for humming or clicking (no sound suggests start relay/compressor issues). 2) Open the freezer and feel for airflow from the evaporator area; no airflow suggests an evaporator fan or blocked/iced coil. Use a multimeter to confirm continuity on suspect motors/sensors before replacing.
Frequently Asked Questions
How can I tell if the evaporator fan is the problem?
Open the freezer and listen while the compressor is running. You should hear the evaporator fan spinning; if the compressor hums but there's no airflow and no fan noise, the fan motor or blade may be bad. Unplug the unit and remove the freezer back panel to visually inspect the fan and blade for damage or ice. With the panel removed and the fridge unplugged, use a multimeter to check the fan motor for continuity. If it has continuity but doesn’t spin when powered (with power applied safely), the motor is likely faulty.
Can I fix this myself or should I call a professional?
You can perform basic checks yourself: clean condenser coils, confirm vents are clear, verify fans run, and listen for compressor operation. Many fan and sensor replacements are DIY-friendly if you’re comfortable with basic hand tools and can disconnect power. For sealed system issues (compressor, refrigerant leaks) or when the start relay/compressor tests suspect, call a certified appliance technician — sealed system repairs require special tools, knowledge, and refrigerant handling certification.
Real DIY Repair Stories
Be the first to share your repair story!
Share Your Repair Story
Your experience helps other homeowners fix their appliances. Tell us how it went!
Can't Fix It Yourself? Find a Local Technician
It's perfectly okay to call a professional. Some repairs require specialized tools, deep teardowns, or dealing with complex systems that are better left to the pros.
Find the Right Part for Your Appliance
Don't guess — search your exact appliance model number at PartsDiscount.com to find the correct OEM compatible replacement part. They offer fast free shipping, guaranteed fit, and thousands of parts in stock.
Your Free Parts Videos
Whether your dishwasher won't drain, your dryer stopped heating, or your fridge isn't cold, we've created simple repair guides for the most common appliance problems homeowners face. Each guide explains what's going wrong, the most likely causes, and which replacement parts fix the issue. When you're ready to order, we link directly to PartsDiscount.com where you can search by model number and get the right part shipped fast.