Refrigerators

Side-by-side refrigerator cooling unevenly between sections

One side of a side-by-side fridge running warmer than the other usually points to a blocked vent, a fan issue, or a door seal problem on the warmer side. Checking airflow between the sections is the key diagnostic step.

Difficulty
Moderate
Time
30–45 minutes
DIY cost
$0–$50
Pro cost
$150–$350

Symptoms

  • One side (fridge or freezer) noticeably warmer than the other
  • Ice buildup or condensation more common on one side
  • Door on one side doesn't seal as tightly as the other
  • Temperature setting seems correct but one side underperforms

Likely causes

  • CommonBlocked airflow vent connecting the two sectionsSide-by-side models share cold air through internal vents, and food blocking them starves one side of proper cooling.
  • CommonDoor seal issue on the warmer sideA worn gasket on one door lets warm air into that specific section more than the other.
  • PossibleEvaporator fan not distributing air evenlyA weak or partially failed fan can favor one side over the other.
  • PossibleOverloading on the warmer side restricting airflowToo many items packed against the internal vents on one side can block circulation specifically there.

What to do

  1. Check both sides for any food blocking the internal vents that share cold air between the fridge and freezer sections.
  2. Test both door gaskets separately with the paper test to see if one seals less tightly than the other.
  3. Use an appliance thermometer to get accurate readings on both sides for comparison.
  4. Listen for the evaporator fan and note if it sounds weaker or intermittent, which could point to uneven air distribution.
  5. Reduce overpacking specifically on the warmer side to improve airflow.
  6. Clean the condenser coils, since reduced overall cooling capacity can sometimes show up as an imbalance between sides.
  7. If one side remains consistently warmer despite clear vents and good seals, a technician can check the fan and damper system specific to that side.

Tools and parts

  • Appliance thermometer
Refrigerator evaporator fan motorSearch: “refrigerator evaporator fan motor”
Refrigerator door gasketSearch: “refrigerator door gasket seal”

When to call a pro

If vents are clear and seals are good but one side stays consistently warmer, a technician can test the fan and damper system feeding that section.

Safety

Generally low risk

Generally low risk for a careful person. Stop if anything looks different from what this guide describes.

Related guides

Operator provides AI-generated troubleshooting information. It can be wrong. For safety-critical, electrical, gas, structural, medical, automotive safety, or other high-risk problems, consult a qualified professional.