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Heater blowing cold air

Tiny
W8ETD
  • MEMBER
  • 2005 SUBARU OUTBACK
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 137,000 MILES
No heat, have replaced the thermostat, replaced the radiator cap, flushed the system twice, blew out the heater core with hose, replaced the blend door, replaced the heater blower motor resistor, purged the system of any air and installed new coolant. Still blowing cold air. Has manual heater controls. Help!
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Wednesday, December 16th, 2020 AT 6:47 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,716 POSTS
Hi,

It sounds like you have done everything. If you allow the engine to warm up with the heater on, do both heater core hoses get hot? Let me know. Also, I assume the blower motor is working.

Also, take a look through this link and see if anything helps:

https://www.2carpros.com/articles/car-heater-not-working

______________________

Let me know what you find or if you have other questions. Also, let me know if you confirmed the blend air door actuator is working.

Take care,
Joe
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Wednesday, December 16th, 2020 AT 4:16 PM

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