Heater blowing cold air

2005 SUBARU OUTBACK
137,000 MILES • 4 CYL • 4WD • AUTOMATIC
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W8ETD
  • MEMBER
  • 1 POST
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!
Dec 16, 2020 at 6:47 AM
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JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 110,190 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

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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
Dec 16, 2020 at 4:16 PM
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