2000 Pontiac Bonneville

Tiny
HARDWAREDAD
  • MEMBER
  • 2000 PONTIAC BONNEVILLE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 82,146 MILES
Heater only blows cool air
Thursday, January 6th, 2011 AT 4:01 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
First, make sure the coolant is full. Next, start the engine and allow it to warm up with the heater on high. Once the engine is warm, feel both heater core hoses. If both are hot, you have a problem with the blend door. If only one gets hot, coolant isn't circulating through the heater core. If that is the case, flush the heater core.
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Tuesday, March 8th, 2011 AT 2:28 AM

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