Heating issue on passenger side

2009 HYUNDAI I30
202,200 MILES • 1.6L • 2WD • AUTOMATIC
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USMAN89
  • MEMBER
  • 15 POSTS
Hi,

i have the car listed above 1.6 CRDI Diesel European model car. It had heating issue which was fixed previously by changing blocked heater core under the dash that cost me a lot of money but it was fixed and worked for more than a year. Now issue again arise as no heat on passenger side and have mild heat on driver side i checked blend door actuator and it works fine it moved when i turn knob to heat and cold. i have added video that shows it does moves . So what is the possible issue here? i don't know. could you please guide me on it? Thanks a lot.
Apr 4, 2021 at 8:30 PM
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ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
Good morning,

When the heater core was replaced, did they power flush the cooling system? This sounds like the heater core is clogged with dirt or debris.

I would remove the heater hoses from the heater core and use a garden hose to flush the heater core. Go back and forth on the core until you have a clean even flow going through the core.

https://www.2carpros.com/articles/coolant-flush-and-refill-all-cars

Roy
Apr 5, 2021 at 4:15 AM