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How to unlock a Buick roadmaster

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Q: How do you open Buick roadmaster heater blend doors?
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Your heater blower is not pushing heat like it used to so what is it ineed to look at in a 1992 roadmaster?

make sure the blend doors are working properly. check the heater core for blockage or debris around it. check thermostat, and have the coolant checked to see if it is still good.


What can cause the heat to quit working in a 1992 Buick Roadmaster?

Possibly a bad heater core. Could be simple stuff though. Have you checked your coolant level? Sometimes those "doors" in the dashboard for the heat and a/c are not opening and closing properly.


Is there a driver and a passenger heater core in a 2000 Jeep Grand Cherokee?

No. one heater core, two airflow control doors. Called blend doors, very prone to breaking.


Why no heat in 1999 Jeep Cherokee classic?

it may be a number of things.... the air blend doors get brittle and break then they fall and lay over the heater core blocking the hot air .... or the air blend door actuator may have broken which does not allow the blend doors to switch from hot to cold ..or cold to hot ..... or the heater core itself cold have gone bad


Where is the heater blend door on a 1988 Oldsmobile Cutlass Supreme?

On a 1982 there are two doors, one in the heater outlet and another behind the glove box. May be the same for 1988.


Why the ac stop blowing cold after you change the heater core in 99 expedition?

The problem is the blend door, not the heater core. Any mechanic worth anything should have checked and replaced the blend doors while it was apart to replace the heater core. Check heatertreater.net for diagnostic information and some real help.


How do you get warmer air to Cherokee heater?

Air flows through the heater core to warm it up. Assuming the heater core is circulating water from the radiator, the problem is usually with the blend doors. These doors regulate air flow through the heater core and when they break, they usually block the input into the heater core and kill the heat. Check heatertreater.net for diagnostic information and an inexpensive fix.


Why does your Buick century's engine surge fast and slow when the heater is turned on in idle?

Depending on the year of the Buick Century it may have vacuum controlled heater blend doors. These use engine vacuum to move the doors that control where the heat is directed. If one of the vacuum lines has a hole in it, it would cause the engine to run unevenly due to the vacuum leak. Check the vacuum lines and listen for air leaks. You can also try spraying the vacuum lines with *small amounts* of carb cleaner, if the engine idle goes up when you spray a particular spot there is a vacuum leak there.


Why is the Heater stuck on high temp on a 2001 mercury sable?

This sounds like a temperature blend door problem - with the door stuck in the heat position. See "Related Questions" below for information on Taurus/Sable blend door actuator motors and blend doors


Why is 1997 Buick Park avenue heater blows hot air on driver's side while blowing cold air on passenger side?

Check the following items............... 1. A/C heater controller. 2. A/C heater controller doors.


Why does heater on 98 Ford Explorer blow out cold air even if switch is turned to hot?

Low coolant?Bad Thermostat?System "airbound"Defective heater control cable?Plugged heater core?The most common reason is a broken blend door in the plenum box. Check the video on YouTube for information on diagnosing and repairing the system. Search "explorer heater" to find the video.It is either a broken blend door, or a broken actuator motor. Typically to fix this problem, a mechanic will disassemble the entire dash, and replace the plenum box. Unfortunately this is an expensive fix because it is labor and parts intensive. There is a DIY solution called heatertreater. They provide instructions on how to access the blend door by removing the glove box, and replacing the blend door without removing the dash and plenum assembly. Broken blend doors are a common problem among Ford explorers, and most heating and A/C issues in late model Ford explorers are directly caused by a malfunctioning blend door.Read more: 2004%20ford%20explorer%20heater%20problems%20clikcing%20noiseThat is why Aluminum blend doors, recirculation doors and modes doors should be preferred over plastic or steel blend doors.Read more: 2000_ford_explorer_heater_fan_motor_makes_a_noise_like_a_leaf_is_in_it


What size are the door speakers for a 1992 Buick roadmaster?

front should be 4x6 in the doors 6x9 in the back deck u have to remove the back seat with star bolt the back brake light in window and the cover to get to the back deck