1994 Pontiac Bonneville heater takes long toheat up

Tiny
SSHERARD
  • MEMBER
  • 1994 PONTIAC BONNEVILLE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 324,000 MILES
My heater takes along time to heat up I changed the thermometer and still will not heat up like it should I changed the cap
Tuesday, November 11th, 2008 AT 4:13 PM

1 Reply

Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,750 POSTS
Check the hoses going to the3 heater core and see if they are hot, if one is hot then I would suspect a clogged heater core. Also if you can gain access to under the dash you can check to make sure the blend door is fully on hot. I check this by switching from hot to cold and see what door moves then make sure it goes fully in each direction
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Tuesday, November 11th, 2008 AT 6:06 PM

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