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Home >> Mazda >> 2002 >> 626 ES, Automatic >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC System >> Basic System >> Heater Core Inspection

Heater Core Inspection

  1. Remove the heater core from the heater unit. (See HEATER UNIT DISASSEMBLY/ASSEMBLY  .)
  2. Check for cracks, damage, and coolant leakage.
    • If any are found, replace the heater core.
  3. Check for bent fins.
    • If any are bent, use a flathead screwdriver to straighten them.
  4. Verify that the heater core inlet and outlet are not distorted or damaged. Repair with pliers if necessary.
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