Bosch B36CL80ENS (French Door) – Temperature fluctuations Repair Guide

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🔧 Temperature fluctuations Repair Guide for Bosch B36CL80ENS (French Door)

💡 Don’t panic! Calibrate temperature sensors; check door seals

📋 What You’ll Need

  • Temperature sensors
  • Door seals

🔧 Step-by-Step Repair Instructions

🔧 Step 1: Test temperature sensor readings

  1. Unplug the refrigerator from the wall outlet and wait 30 seconds for the control board to fully power down.
  2. Plug the refrigerator back in and immediately press and hold the “Freezer Temperature” and “Refrigerator Temperature” buttons simultaneously for 3 seconds to enter diagnostic mode.
  3. Watch the LED display panel – it will show “P0” indicating you’re in diagnostic mode, and the display will cycle through codes automatically every 2-3 seconds.
  4. Write down the temperature readings as they appear:
  5. Compare your readings to normal values:
  6. Press the “Light/Filter Reset” button once to advance through diagnostic codes if the display stops cycling automatically.
  7. Watch for error codes displayed as “E” followed by numbers – write down any that appear:
  8. Press and hold both temperature buttons for 3 seconds again to exit diagnostic mode.
  9. If any sensor reads “OF” (open), “–” (dashes), or displays an E01/E02/E03 error code, that specific sensor requires replacement and is causing your temperature control issues.
  10. Record which sensor(s) failed – this determines which repair steps follow.

🛠️ Step 2: Calibrate sensors if needed

  1. Press and hold the “Alarm” button on the control panel (located at the top right of the refrigerator interior, 2 inches from the door frame) for 5 seconds until you hear two beeps.
  2. Press the “Super Cool” and “Super Freeze” buttons simultaneously for 3 seconds to enter diagnostic mode – the display will show “dE” indicating diagnostics are active.
  3. Press the temperature down arrow on the freezer side 4 times to scroll to code “S1” (fresh food sensor calibration).
  4. Open the fresh food compartment and locate the temperature sensor – a white cylindrical probe 3 inches long, mounted on the rear wall 18 inches from the top, 8 inches from the left side.
  5. Place a calibrated digital thermometer directly next to the sensor probe, securing it with painter’s tape so the sensing tip touches the same surface.
  6. Wait 20 minutes for temperature stabilization – both readings should match within 2°F.
  7. If readings differ by more than 2°F, press and hold the “Alarm” button for 8 seconds while in diagnostic mode S1 – the display will flash “Ad” for adjustment mode.
  8. Press the temperature up arrow to increase sensor calibration by 1°F increments, or down arrow to decrease – each press adjusts by 1°F, maximum adjustment range is Âą5°F.
  9. Press “Super Cool” to save the fresh food sensor adjustment – you’ll hear one confirmation beep.
  10. Press the temperature down arrow 2 times to advance to code “S2” (freezer sensor calibration).
  11. Repeat the measurement and adjustment process (steps 4-9) for the freezer sensor, located on the left sidewall 12 inches from the top, 4 inches from the rear.
  12. Press and hold both “Super Cool” and “Super Freeze” buttons for 3 seconds to exit diagnostic mode – the display returns to normal temperature readings and sensors are now calibrated.

⚙️ Step 3: Check door seals for gaps

  1. Open the refrigerator door to access the left side door gasket, starting at the top left corner where the vertical and horizontal gasket sections meet.
  2. Run your hand along the entire perimeter of the gasket, pressing inward with 2-3 pounds of pressure to feel for any soft spots, tears, or areas where the magnetic seal feels weak.
  3. Close the door and place a dollar bill halfway between the door gasket and the cabinet frame at the top center, approximately 18 inches from the left edge.
  4. Pull the door closed completely and tug on the dollar bill – you should feel moderate resistance when pulling it out; if it slides out easily with no friction, the seal has a gap at this location.
  5. Repeat the dollar bill test at 8 additional locations around the door perimeter: top right (18 inches from right edge), middle right (36 inches down from top), bottom right corner, bottom center, bottom left corner, middle left (36 inches down from top), and top left corner.
  6. Mark any failed test locations with a piece of masking tape on the cabinet frame adjacent to the gap.
  7. Open the door and inspect the gasket at each marked location, looking for visible deformities such as twisted gasket sections, compressed areas that don’t spring back when pressed, cracks longer than 1/4 inch, or debris lodged between the gasket folds.
  8. Check where the gasket attaches to the door liner by gently pulling the outer lip of the gasket away from the door – the retainer strip should be fully seated in the channel with no sections pulled loose.
  9. Clean any debris from the gasket surfaces using a damp cloth with warm water and mild dish soap, wiping all four sides of the gasket completely.
  10. Repeat the dollar bill test at all previously marked gap locations to verify if cleaning resolved the seal issue.

🔩 Step 4: Verify proper door closure

  1. Close the refrigerator door completely and stand 3 feet back to observe if the door sits flush against the cabinet frame along its entire perimeter.
  2. Open the door and locate the two door hinges on the top of the door—one at the front edge and one approximately 2 inches back from the front edge.
  3. Check the gap between the door and cabinet frame using a dollar bill test: place a dollar bill between the door gasket and cabinet at the top right corner, close the door, and pull the bill out—you should feel moderate resistance.
  4. Repeat the dollar bill test at 6 additional locations: top left corner, middle right (18 inches down from top), middle left (18 inches down from top), bottom right corner (3 inches up from bottom), bottom left corner (3 inches up from bottom), and center bottom.
  5. If the bill pulls out with no resistance at any location, identify which corner or side has the gap—this indicates misalignment.
  6. Examine the door gasket (the rubber seal) around the entire perimeter for any visible twists, folds, or sections not making contact with the cabinet frame.
  7. Look at the bottom front of the refrigerator and locate the two adjustable leveling legs, positioned approximately 3 inches in from each side edge.
  8. Place a 24-inch level horizontally across the top front edge of the refrigerator, resting it on the cabinet frame.
  9. Check if the bubble in the level sits between the center lines—the refrigerator should be level side-to-side or tilted back slightly (bubble barely right of center).
  10. Place the level vertically against the right side of the door when closed to verify the door hangs straight without leaning left or right.
  11. Open the door halfway (approximately 45 degrees) and release it—a properly aligned door will either stay in position or slowly swing closed on its own, never swing open.

📋 Step 5: Replace sensors or seals if faulty

  1. Grasp the old door seal at any corner and pull it straight out from the retaining groove that runs around the door perimeter.
  2. Clean the empty retaining channel using a damp cloth to remove debris, mold, or residue—the channel is approximately 0.5 inches wide and runs the entire door edge.
  3. Starting at the top left corner, press the new seal’s bulb edge into the retaining groove, working 6 inches at a time around the door frame.
  4. At each corner, compress the seal material slightly (about 0.25 inches) to ensure it doesn’t pull tight or create gaps when you complete the loop.
  5. Push firmly with your thumbs along the entire seal perimeter to verify it sits flush in the channel with no sections protruding or twisted.
  6. Close the door and check that it creates resistance when opening—the seal should compress visibly against the cabinet opening.
  7. Locate the refrigerator temperature sensor—a white cylindrical probe (2 inches long, 0.25 inches diameter) mounted on the upper right interior wall, approximately 8 inches below the ceiling and 3 inches from the right side.
  8. Disconnect the 2-pin white connector by pressing the release tab on top while pulling straight back.
  9. Remove the sensor from its mounting clip by sliding it upward 0.5 inches until it releases.
  10. Insert the replacement sensor (part number 00057150) into the mounting clip, sliding downward until it clicks.
  11. Connect the 2-pin connector—you’ll feel resistance then hear an audible click when properly seated.
  12. For the freezer sensor, repeat steps 1-5 on the left freezer wall, 10 inches from the bottom and 4 inches from the back wall.
  13. Verify both sensor tips are not touching any food items or walls—maintain 1 inch clearance minimum for accurate readings.

⚠️ Safety Reminders

  • Always unplug the refrigerator before beginning any repair work
  • Allow the unit to warm up if working with frozen components
  • Use proper tools and safety equipment
  • If you’re unsure about any step, consult a professional

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🛒 Recommended Products

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