Hyundai Sonata: Heater / Heater Core Repair procedures
| 1. |
Disconnect the negative (-) battery terminal. |
| 2. |
After loosening the bolts remove the main crash pad and cowl cross bar assembly together.
(Refer to Heater -"Heater Unit") |
| 3. |
Remove the heater core cover (A) after loosening the mounting screws. 
|
| 4. |
Pull out the heater core (A) from the heater unit. 
|
| 5. |
Install in the reverse order of removal.
| A. |
If you're installing a new heater core, add refrigerant oil (PAG OIL). |
| B. |
Replace the O-rings with new ones at each fitting, and apply a
thin coat of refrigerant oil before installing them. Be sure to use the
right O-rings for R-134a to avoid leakage. |
| C. |
Immediately after using the oil, replace the cap on the container, and seal it to avoid moisture absorption. |
| D. |
Do not spill the refrigerant oil on the vehicle; it may
damage the paint; if the refrigerant oil contacts the paint, wash it off
immediately. |
| E. |
Apply sealant to the grommets. |
| F. |
Make sure that there is no air leakage. |
| G. |
Charge the system and test its performance. |
| H. |
Do not interchange the inlet and outlet heater hoses and install the hose clamps securely. |
|
Replacement
When prying with a flat-tip screwdriver or use a prying trim
tool, wrap it with protective tape, and apply protective tape around the
related parts, to prevent ...
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
After loosening the bolts remove the main crash pad and cowl cross bar assembly together.
(Refer to Heater -"Heater Unit")
...
Other information:
Hyundai Sonata LF 2014-2019 Owners Manual: Tire Terminology and Definitions
Air Pressure
The amount of air inside the tire pressing outward on the tire. Air pressure
is expressed in pounds per square inch (psi) or kilopascal (kPa).
Accessory Weight
This means the combined weight of optional accessories. Some examples of optional
accessories are automatic transmission, pow ...
Hyundai Sonata LF 2014-2019 Owners Manual: Emission Control System
The emission control system of your vehicle is covered by a written limited warranty.
Please see the warranty information contained in the Owner’s Handbook & Warranty
Information booklet in your vehicle.
Your vehicle is equipped with an emission control system to meet all applicable
emissio ...
Heater Unit Repair procedures
Evaporator Core Repair procedures