Question about 1998 Mercury Grand Marquis
The switch that controls the hot and cold air through the vents stopped working is there a simple fix please help summer in Florida brutal
Are you saying the temp blend door is not working?
If yes, it's the control head or the temp blend door motor on th plenum case under the dash. Buy used on ebay.
DO you have manaul or electroic controls?
A/C Electronic Blend Door Actuator The A/C electronic blend door actuator is located on top of the A/C evaporator core housing (19A553) assembly.
#3 is the blend door.
Posted on May 08, 2010
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Posted on Jan 02, 2017
common problem, check under dash by the gas pedal if control arms are muving went selecting from ac to heat cuz this it is the control for the vents to go from ac to heat and to defrost.
Posted on Feb 23, 2009
On most cars when you push a button or slide a lever to change your choice of location where you want the air to blow out louvers move inside the dash to redirect the air to your chosen location. When you switch from heat to AC other louvers move. These louvers are often powered by vacuum lines running from the engine. If one of these louvers is stuck or if you have a vacuum leak in one of the lines it may be causing your problem.
Posted on May 12, 2009
SOURCE: 2003 accord air conditioner
This is a common problem when the AC system has a low charge.
If this is the case, you have a leak somewhere. Do not try to fix it yourself without the proper equipment.
Posted on May 21, 2009
Can someone who has had the problem , provide the solution? I want to thank you in advance if you have the answer.
Z from North Carolina
Posted on Aug 16, 2009
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