Refrigerator Running Constantly? Here’s Why (And What To Check)
Your fridge is running non-stop. The compressor almost never shuts off. Maybe it still cools, maybe it doesn’t. Maybe it only happens in warm weather. Maybe it started after you noticed the door wasn’t closing properly.
Here’s the thing most people get wrong: they assume the compressor has failed and start looking at replacement fridges. In reality, the most common causes are dirty condenser coils, a faulty door seal, or a thermostat fault — all of which are free or cheap to fix.
A fridge that runs constantly is trying to reach a temperature it can’t achieve. The reason it can’t reach that temperature tells you which component is at fault. If it still cools, the thermostat isn’t reading correctly, or the fridge is losing cold air. If it doesn’t cool, the system can’t produce cold at all.
This page covers the four fault patterns, the symptoms to look for, and the checks you can perform yourself. If you need the complete diagnostic sequence for determining whether the fault is the thermostat, the seal, the coils, or the compressor, the full guide is linked at the bottom.
Quick Diagnosis
Runs constantly but still cools: a thermostat fault, a door seal fault, or dirty condenser coils.
Runs constantly and doesn’t cool: a refrigerant leak, a failing compressor, or a sealed system fault.
Runs constantly in warm weather: a condenser or ventilation issue.
Runs constantly after the door is opened: a door seal fault.
Runs constantly with a clicking sound: a failed start relay.
Why Your Fridge Runs Constantly
A refrigerator doesn’t run constantly under normal conditions. The thermostat monitors the temperature and switches the compressor on and off as needed. When the fridge reaches its target temperature, the compressor stops. When the temperature rises, the compressor starts again.
If any part of that cycle fails, the fridge may run constantly. The pattern of what’s happening tells you which part has failed.
Common Causes Dirty Condenser Coils
The most common cause. The coils release heat into the room. When they’re packed with dust, the system can’t shed heat, and the compressor runs longer to compensate.
Damaged Door Seal
A damaged door seal lets warm air in. The fridge works harder to maintain temperature, so the compressor runs almost constantly.
Failed Thermostat
The thermostat isn’t reading the temperature correctly, so it never signals the compressor to stop.
Failed Condenser Fan
The fan that pulls air across the condenser coils has failed. The coils overheat, and the system runs longer.
Failed Evaporator Fan
The fan that circulates cold air has failed. The compressor runs but cold air doesn’t reach the compartments.
Refrigerant Leak
The system is low on refrigerant. The compressor runs constantly trying to compensate.
The compressor is losing efficiency. It runs but can’t produce enough cooling.
Poor Ventilation
The fridge is in a cabinet or against a wall with no airflow. Heat can’t escape.
Symptoms To Look For
The pattern tells you which component is at fault.
Runs Constantly, Still Cools
The thermostat isn’t reading correctly, or the fridge is losing cold air. Check the seal and the coils first.
Runs Constantly, Doesn’t Cool
The system can’t produce cold. Check for a refrigerant leak or a failing compressor.
Runs Constantly Only in Warm Weather
The fridge can’t shed heat efficiently. Clean the coils and improve ventilation.
Runs Constantly After Door Opening
The door seal has failed, or the door isn’t closing properly.
Runs Constantly With Clicking
The start relay is failing. The compressor is trying to start but can’t.
How to Diagnose the Fault
Step 1 — Confirm Whether the Fridge Is Cooling
This is the first and most important diagnostic step.
Still cools — thermostat, seal, or condenser issue
Doesn’t cool — refrigerant leak or compressor issue
That single observation splits the diagnosis in two.
Step 2 — Check the Door Seal
Run a dollar bill around the door seal. Close the door on the bill and pull it out. If it slides out with no drag, the seal has failed at that point.
Step 3 — Clean the Condenser Coils
Pull the fridge out and inspect the coils. Clean them if they’re dusty.
Step 4 — Listen for the Fans
Put your ear to the back of the fridge (condenser fan) and inside the freezer (evaporator fan). Both should be running when the compressor runs.
Step 5 — Test the Thermostat
With the fridge unplugged, test the thermostat for continuity at different temperatures.
Step 6 — Check for Refrigerant Leak Signs
Look for oily residue around the sealed system connections at the back of the fridge.
Step 7 — Test the Compressor
Test the windings for continuity. If you have a clamp meter, test the running current.
Fixing Specific Running Constantly Faults
Fridge Constantly Running
The general fault. Check the coils and the door seal first. Both are common and cheap to fix.
Fridge Continuously Running
Same fault, different phrasing. Check the thermostat, the seal, and the coils.
Refrigerator Keeps Running
If it runs non-stop but still cools, the thermostat is likely the fault.
Refrigerator Running All The Time
Check the ventilation. A fridge in a cabinet or against a wall can’t shed heat.
Fridge Running All The Time
Dirty condenser coils are the most common cause. Clean them first.
Brand New Fridge Runs Constantly
A new fridge can run constantly for the first 24 hours while it reaches temperature. If it runs constantly after that, check the ventilation and the door seal.
Whirlpool Refrigerator Runs Constantly
Whirlpool fridges often run constantly due to dirty condenser coils. Check the coils behind the kick plate.
GE Refrigerator Constantly Running
GE fridges often run constantly in warm weather or with dirty coils. Clean the coils and improve ventilation.
Refrigerator Compressor Runs Constantly
If the compressor runs constantly and the fridge doesn’t cool, there’s a refrigerant leak or the compressor is failing.
My Refrigerator Runs Constantly
Check the door seal first. It’s the most common cause of a fridge that runs constantly but still cools.
Repair Cost Guide
Condenser coil cleaning: $0
Door seal: $30 to $80 for the part, $150 to $300 fitted
Thermostat: $20 to $60 for the part, $150 to $300 fitted
Condenser fan motor: $40 to $120 for the part, $200 to $400 fitted
Evaporator fan motor: $40 to $120 for the part, $200 to $400 fitted
Compressor: $150 to $400 for the part, $400 to $800 fitted
Sealed system repair: $500 to $1,200 fitted
When to Repair vs Bin
Repair if:
The fault is dirty coils, a door seal, or a thermostat
The fridge is under eight years old
The repair cost is under half the cost of a new fridge
The fridge has no other faults
Bin if:
The compressor has failed on a fridge over eight years old
The fault is a refrigerant leak
The fridge has multiple failed components
The repair cost exceeds half the cost of a new fridge
Safety Warning
Electrical risk. Refrigerators run on mains voltage. Unplug the appliance before removing any panel or accessing any component.
Hot components. The compressor and condenser coils can be hot during operation. Let the fridge cool before working near them.
Sharp edges. The evaporator coil and its associated components can be sharp. Handle with care.
Water risk. If your fridge uses a water supply line, shut off the water before disconnecting any line.
FAQ
Why is my fridge running constantly?
The most common causes are a thermostat fault, a door seal fault, or dirty condenser coils. Check the coils and seal first.
Why does my fridge run all the time but still get cold?
The thermostat isn’t reading the temperature correctly, or the fridge is losing cold air through a faulty seal.
Why does my fridge run constantly and not cool?
This points to a refrigerant leak or a failing compressor. Both are expensive repairs.
Why does my fridge run constantly in warm weather?
The fridge can’t shed heat efficiently. Clean the condenser coils and improve ventilation.
Why does my fridge keep running after I close the door?
The door seal has failed, or the door is misaligned. Check the seal first.
Why is my Whirlpool fridge running constantly?
Whirlpool fridges often run constantly due to dirty condenser coils or a failing door seal. Check both.
Why is my GE fridge running constantly?
GE fridges often run constantly in warm weather or with dirty condenser coils. Check the coils first.
Is it worth repairing a fridge that runs constantly?
Usually yes, if the fault is a thermostat, door seal, or dirty coils. If the compressor has failed or there’s a refrigerant leak, replacement is usually the better call.
Get the Complete Diagnosis
Need to determine exactly which component is causing the fault?
The complete diagnostic guide takes you beyond the basic checks and walks through all four fault patterns step by step.
The complete guide includes:
Thermostat testing with expected readings
Door seal testing and replacement
Condenser coil cleaning
Condenser and evaporator fan testing
Refrigerant leak identification
Compressor testing
Model-specific notes for Whirlpool, GE, Samsung, and LG
Repair and replacement considerations
Repair-or-bin guidance
Refrigerator Running Constantly Repair Guide
Complete diagnostic guide for refrigerators that run non-stop.
What’s included:
Diagnosis for all four fault patterns
Step-by-step testing procedures
Thermostat and seal testing
Condenser coil cleaning
Fan and compressor testing
Required checks and tools
Repair information
Replacement considerations
Repair-or-bin guidance
Download instantly
$3.95
Have More Than One Refrigerator Problem?
If you’re dealing with several problems rather than just a running fault, the Refrigerator Not Cooling guide covers the most common cooling faults in one reference.
$7.95
Looking for Brand-Specific Guides?
Our brand guides cover washers, dryers, and dishwashers from Fisher & Paykel, Samsung, LG, Bosch, Whirlpool, Maytag, GE, and Miele.
$12.95
Repair or Bin?
Before spending money on a repair, find out what is actually wrong with your appliance.
Repair or Bin gives you the information to diagnose the problem and make an informed repair-or-bin decision.
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