2004 Buick Park Avenue Heater problem

Tiny
MARKUS459
  • MEMBER
  • 2004 BUICK PARK AVENUE
Heater problem
2004 Buick Park Avenue 6 cyl Front Wheel Drive Automatic

2004 park avenue with climate control. Heater blows cold air. I have cleaned the cooling system and replaced the thermostat. After letting the car warm up, I noticed that the heater inlet hose was hot but the outlet hose was cold. Is there a shutoff or does the water circulate through the heater at all times? I'm not sure if the core is plugged or if it is a control problem.
Please help.
Friday, November 20th, 2009 AT 3:40 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,124 POSTS
Actually, your car has a blend door that opens and closes to allow heat to enter the vehicle. With the engine hot, running, and the heater on, both heater core hoses should be hot. I would start by flushing the heater core. Like you mentioned, it may be plugged.

Let me know what you find.
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Wednesday, November 25th, 2009 AT 8:25 AM

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