Hyundai Tucson Quiz
Heating, Ventilation and Air Conditioning

Heater Core Repair Procedures

In this manual: Heating, Ventilation and Air Conditioning
General Information — 17Engine Mechanical System — 51Engine Electrical System — 26Emission Control System — 23Engine/Fuel Control System — 44Clutch System — 12MANUAL TRANSMISSION SYSTEM — 12AUTOMATIC TRANSMISSION SYSTEM — 42Four-Wheel Drive (4WD) System — 14Drive Shaft and Axle — 22Suspension System — 30Steering System — 16Restraint — 21Braking System — 47Body Work (Interior and Exterior) — 145Body Electrical System — 162Heating, Ventilation and Air Conditioning — 39
6steps
~36min
2/5difficulty
Done 0 of 6

REPLACEMENT

  1. Disconnect the negative (-) battery terminal.
  2. Remove the heater and blower unit. (Refer to Heater - "Heater Unit")
  3. Remove the gasket from the heater radiator pipe (A).
  4. After loosening the retaining screws, remove the heater core cover (A).
  5. Pull out the heater core (A) from the heater unit.
  6. To install, perform the removal procedure in reverse order.
    • When installing a new evaporator, add refrigerant oil (PAG oil).
    • Replace the O-rings on each fitting with new ones and coat them with a thin layer of refrigerant oil before installation. To prevent leaks, make sure to use O-rings designed for R-134a refrigerant.
    • Immediately after using the oil, replace the container cap, then tightly close the container to prevent moisture absorption.
    • Be careful not to spill refrigerant oil on the vehicle, as it may damage the paint. If refrigerant oil contacts the paint, wash it off immediately.
    • Apply sealant to the bushings.
    • Make sure there are no air leaks.
    • Charge the system, then check it for proper operation.
    • Do not reverse the heater inlet and outlet hoses, then firmly install the hose clamp.

Test yourself

A quick Hyundai Tucson quiz: every answer comes with an explanation and a link to the manual page.