car is blowing hot air

2000 MERCURY SABLE
200,000 MILES
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LEERICHTER
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I have a 2000 mercury Sable and it started to blow hot air I have opened the glove box and located the actuator and when the ac is turned on it seems to make noise what could it be
Jul 28, 2012 at 6:15 AM
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ASEMASTER6371
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first, check the pressures of the ac system for operation then we can talk about mode doors.

Roy
Jul 28, 2012 at 6:26 AM
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LEERICHTER
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Ac system is fine 65/195
Jul 28, 2012 at 6:28 AM
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ASEMASTER6371
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blend door motor is a common failure. can you hear the door moving??

Roy
Jul 28, 2012 at 6:52 AM
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LEERICHTER
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No distinct sound just a kind of hum
Jul 28, 2012 at 6:56 AM
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ASEMASTER6371
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sounds like your issue.

Roy
Jul 28, 2012 at 7:00 AM
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LEERICHTER
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what is, and how do you fix it
Jul 28, 2012 at 7:06 AM
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ASEMASTER6371
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it is a blend door motr, available at a parts store and it is held by 3 smal bolts and an electrical connector. it is very tight to acess.

Roy
Jul 28, 2012 at 7:28 AM
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LEERICHTER
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I got a new actuator and plugged it in and it does not work ether this car has a circuit board next to the actuator and the plugs are connected any idea as to why it is not working
Jul 28, 2012 at 9:40 AM
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LEERICHTER
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fuse is good to
Jul 28, 2012 at 9:42 AM
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ASEMASTER6371
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you said it was humming?????

plugs??? it has 1 connector.

Roy
Jul 28, 2012 at 9:44 AM
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LEERICHTER
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humming was something else door actuator will not move at all it is electric with a plug that plugs into the side of it
Jul 28, 2012 at 9:47 AM
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ASEMASTER6371
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the blend door is a small square box with 1 small connector and a round shaft the engages a shaft in the heater housing.

it is at the glove box to the left low on the housing.

is this the same unit you got>>

Roy
Jul 28, 2012 at 9:51 AM
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LEERICHTER
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YES plugged a new one in and it will not move ether this is a computer controlled ac system
Jul 28, 2012 at 9:59 AM
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ASEMASTER6371
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automatic climate conteol???

Roy
Jul 28, 2012 at 10:00 AM
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LEERICHTER
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Yes
Jul 28, 2012 at 10:08 AM
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ASEMASTER6371
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different system that does not use that at all. whatever you got is wrong as this box is for manual air systems

you need a shop with a scan tool that can monitor the actions of the programmer to determine the failure.

sorry for the confusion. it is not a common option for this model

Roy
Jul 28, 2012 at 10:13 AM
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LEERICHTER
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I assume you have never dealt with this before
Jul 28, 2012 at 11:03 AM
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ASEMASTER6371
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yes, i have but without a scan tool, everything is a guess. auto systems are computer controlled and you need to see values that are available in a scan tool.

Roy
Jul 28, 2012 at 11:27 AM
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