Hyundai Tucson LM Quiz
Heating, Ventilation, and Air Conditioning

Heater Repair Procedures

In this manual: Heating, Ventilation, and Air Conditioning
General Information — 1Engine Mechanical System — 44Engine Electrical System — 45Emission Control System — 24Engine Control System/Fuel System — 93Clutch System — 13Manual Transmission — 18Automatic Transmission — 87Four-Wheel Drive (4WD) System — 26Drive Shaft and Axle — 29Suspension System — 35Steering — 20Restraints — 47Brake System — 36Body (Interior and Exterior) — 53Body Electrical System — 202Heating, Ventilation, and Air Conditioning — 58
12steps
~72min
3/5difficulty
0102030405011.79N·mlb·ft
Tightening torque found on this page
Done 0 of 12

Replacement

  1. Disconnect the negative (-) battery terminal.
  2. Charge the refrigerant using the refrigerant recovery/recycling/charging station.
  3. When the engine has cooled, drain the engine coolant from the radiator.
  4. Remove the expansion valve cover (A).
  5. Remove the bolts (A) and the expansion valve (B) from the evaporator core. Plug or cap the lines immediately after disconnecting them to prevent moisture and dust from entering.

    Tightening torque: 7.8 ~ 11.7 N·m

  6. Disconnect the inlet (C) and outlet (D) heater hoses from the heater unit.
    Engine coolant will drain when the hoses are disconnected. Drain it into a clean pan. Be careful not to spill coolant on electrical parts or painted surfaces. If coolant is spilled, wash it off immediately.
  7. Remove the airbag (refer to Group BD - Airbag).
  8. Disconnect the connectors from the temperature control actuator, the mode control actuator, and the evaporator temperature sensor.
  9. Remove the hood crossmember assembly (refer to Group BD - Hood Crossmember).
  10. Remove the heater and blower unit by removing the 3 mounting bolts.
  11. Remove the blower unit (B) from the heater unit by removing the 3 screws.
  12. Install in the reverse order of removal, paying attention to the following items:
    A. If installing a new evaporator, add refrigerant oil (ND-OIL8).
    B. Replace the O-rings with new ones at each fitting and apply a thin coat of refrigerant oil before installation. Be sure to use the correct O-rings for R-134a to prevent leakage.
    C. Immediately after use, close the container with its cap to prevent moisture absorption.
    D. Do not spill refrigerant oil on the vehicle; it may damage the paint. If refrigerant oil gets on the paint, wash it off immediately.
    E. Apply sealant to the bushings.
    F. Check that there is no air leakage.
    G. Charge the system and check that it operates properly.
    H. Do not reverse the inlet and outlet heater hoses, and securely install the hose clamps.
    I. Fill the cooling system with engine coolant.

Test yourself

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