Question about 2002 Buick Park Avenue

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2002 buick park avenue. coolant temp reads 165 when driving and heater blows cold air. sitting with car running the temp slowing creeped up to 208 and air got warm but as soon as we started driving a

When driving coolant temp reads 165 and heater blows cold. when parked and running coolant temp gets up to 208 and heater blows warm. What could cause this?

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  • 6 Answers

Thermostat or low coolant

Posted on Nov 20, 2014

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Posted on Jan 02, 2017

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  • 4 Answers

SOURCE: 99 park avenue blows cold

As snowbird said, it's most likely your passenger climate control system. Could be a short in a wire or a burnt acuator that moves the passenger door open and close. If you don't have the money or time to troubleshoot the problem you can pull down the glovebox and you'll see a metal rod about 8 inches long connected to the acuator. If you pop it off by the white connector, you can move it to full hot or cold. If it was the heater core it wouldn't matter where the air is comming out, it'd be the same temp.

It'll take you 5 minutes tops to simply check it by moving that door.

Good Luck

Posted on Oct 30, 2008

shaggyrat
  • 1224 Answers

SOURCE: Buick park avenue 1994 heater not working temp.display blinking

off the top of my head you probably have digital controls
the jump probably gave the heater relay a jolt of elec. which made it freeze open or shut
try disconnecting battery for 5 minutes and reconnect it this should reset relay
also heres something to look at even though it gets cold a hose could have split and slow leak on passenger side check floor for wetness if so take to nearest auto shop this needs fixed right away

i had a car that the relays froze shut so i had to manual start it under neith the car with a long screw driver cause key wouldnt start it

temp guage only shows temp not low coolant you gotta pop the hood and check manually the coolant tank for low fluid
even with low fluid the car would have heated up quicker so the idea of low fluid is a gasp heater would have heated quicker too
check condensor in front the small radiator infront of big radiator to see if iced up a little hose water sprayed on it should loosen the ice if any try to see if theres a way in mornings to see if you have any coolant leaks
coolant leaks can break a car into parts and be costly

Posted on Dec 06, 2008

blueextc3221
  • 15935 Answers

SOURCE: Replace Thermostat in 1998 Buick Park Avenue

this doesnt sound like a thermostat problem, rather a restricted heater core.
The thermostat housing, however, is a cheap cross-your-fingers-fix, and can be located by tracing the upper radiator hose back to the engine. The housing the hose is clamped to is where the thermostat is located. Remove 2 bolts, and replace thermostat.

Posted on Jan 12, 2009

  • 1 Answer

SOURCE: heater starts to heat then afer a minute blow cold

water pump

Posted on Jan 18, 2009

  • 115 Answers

SOURCE: 2000 Buick Park Avenue Service engine soon light

need to take car somewhere to have the code read with a scanner,try parts stores first some will do it for free if not the dealers have them

Posted on Sep 15, 2009

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My heater is only blowing cold air in my 1996 buick park avenue. had the thermostat changed but it didn't get any better


Could be the diverter valve. It's the one located near the firewall2_bing.gif in the engine bay. The valve is in-line on one of the two coolant hoses that run through the firewall. Have a helper rotate the temperature knob back and forth, with the ignition turned on, and you watch to see if the valve is being adjusted. I'm guessing it isn't. Best of luck!

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You probably created an air bubble, lock in heater core or the hoses that brings hot water to it when the coolant was replaced, you need to flush the system by loosening the heater hose at the highest point while the engine is running and is up to temperature.

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Make sure there are no leaks and that the system is full to capacity. After the vehicle has warmed up check radiator hoses for temperature differecial also check heater core hoses. A significant difference in temperature may indicate a plugged heater core or thermostat failure

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The cooling thermostat may be failing since this customarily diverts hot water to the heater core first to give a faster response. That isn't an expensive or difficult job to replace it so I would start there. If the system is going to be opened anyhow, I suggest you flush the system first. That may even solve the problem.
Coolant will be lost in the replacement so catch as much as you can to avoid having someone's pet lap up the stuff and die.

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one or more of your actuators is malfuntioning.  they ar eunder the dash.  I had a mechanic repair mine for about 400 bucks.  the dash needs to b removed and some very tight spots to work in.  the flashing is maybe caused from the sensor.  either outside air tempo sensor or inside. does it blink while showing the inside or ouside.  not exactly sure where the inside is, but the outside is in the center in front of radiator when u open the hood. black about the size of a tube of chap stick.

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