Question about 1998 Cadillac DeVille

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1998 Cadillac sts. The air conditioning blows

1998 Cadillac sts. The air conditioning blows cold in waves. It seems as if the blender door is not constantaly directing the air to the proper vents and maybe allowing outside air to be blended with conditioned air. The air flow is just ok on some vents and nothing for the floor vents. The fan is excessivley noisey with the sound of air be pushed somewhere. Just had the freon/r12 checked at Cadillac and all is well there. Ideas?

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YOU HAVE ADD THE WRONG FREON ALL CARS MADE AFTER 1996 USES R/134. FLUSH THE SYSTEM, ALSO CHECK THE BLOWER FAN FOR DEBRIS

Posted on Jul 18, 2009

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2 Answers

On a 1998 STS Cadillac is the air mixing box and actuatordoor under the dash behind glovebox?


many cars automatically kick on the air compressor in defrost, to dehumidify the cabin air

Jan 03, 2015 | 1998 Cadillac Seville

1 Answer

The two vents on driver side of car blows hot air when air conditioning is on


I believe that your Seville has dual climate controls.So it sounds like a "Blend Door Actuator" problem. It's stuck and so it's not adjusting the mix of warm or cold air; that's how temperatures are controlled in your A/C heat system. Fault code(s) stored in the HVAC control module should be available to assist with diagnoses. AutoZone will perform a free diagnostic scan.

Jun 10, 2012 | 1998 Cadillac Seville

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Where is the driver side blend door actuator on a 98 Seville STS?


I believe that the right side has a blend door actuator, and the left side or driver side just gets air from the regular flow from the programmer and vacuum motors.

Dorman/Blend Door Actuator
Part Number:
604-106
btn-view-details.png Price: $139.99
Notes: Dorman-OE SolutionsTemperature door. Right

Oct 29, 2010 | 1998 Cadillac Seville

1 Answer

Air-conditioning


Low refrigerant charge or a sticking blender door. Check the suction line for temperature. A cold tube means that the charge is fine.

May 12, 2009 | 2000 Pontiac Montana

1 Answer

1998 caddy sts over heating and blowing cold air when heat is on


sounds like it might be low on coolant. Low coolant levels will stop the flow and circulation to the heater core, and also might be the cause of overheating

Apr 02, 2009 | 1998 Cadillac DeVille

1 Answer

I have 1998 cadillac STS and the heater blows cold air only


this problem is caused by a defective air temp control blend door motor, this door and actuator motor is located inside the dash between the heater core and the AC evaporator core, it shifts airflow through the heater core or the AC core or mixes or blends the two for the desired temp at the outlets, the motor will have to be replaced. This is a very common issue.

Jan 21, 2009 | 1998 Cadillac DeVille

1 Answer

Problem with AC, dual climate zones


The temperature blend door on the driver's side might be broken or stuck. Also, if this vehicle does not have the correct amount of refrigerant, it will do what you are describing.

May 22, 2008 | 2001 Cadillac Sts

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