The ac is working but there is a clicking noise [constant] located in the area behind the radio and the temperature controls. some one told me it was some kind of gate or door thats vacume driven. I'm good at mechanical stuff so iI wiuld like to find the problem and fix it. A repair type said that it would cost $500.00 for a shop to fix. HELP
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Re: dash removal 1996 lincoln tc
Most likely they ( the Ford dealer) cracked the heater core when they pulled the dash to fix the other problem, I worked as a Ford dealer tech for 20 years and this is entirely possible.
For poster markjschwab, the noise is the blend door motor, so your dash will need to be removed to fix that issue, be careful of the heater core or just replace it while the dash is out, they are cheap.
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The most common cause of clicking (under the hood) while driving is an undercharged AC system. The sound is the compressor constantly turning on and shutting off. The problem could also be related to the temperature control panel which could constantly call for the compressor to turn on and off.
There is a blend door motor that moves the door in the HVAC box. When the motor strips it's gears or extends it's designed travel limit. it makes a clicking noise. Most likely, the door itself is broken. "Heater Treater" makes a replacement door that can be installed without removing the dash in most cases. HTH , Les
the clicking noise is from the Heater/AC air temperature control bleed door, either the blend door shaft is broken or the actuator gears are slipping over eachother that move the door, these used to be cable operated, an electric motor was added years ago for more precise temp control of AC and Heating, to repair this the entire dash must be removed, this requires a factory repair manual and is a 10-12 hour job, very difficult job.
The little motor that controls the blender door is behind the dash in the center at the bottom of the windshield. It can only be assessed by dropping the steering column and removing the dash . You can tell if it is not working by a clicking sound coming from that area when a/c or heat is on and you turn the temp up or down
If this noise is a clicking sound and is coming from the front center of the dash, then it may be the blender door motor which will require removal of the dash to replace it. It will keep the door from switching from heat to a/c. Does the odor smell like you have a freon leak in your a/c evaporator core or does it smell like a rat stuck in your heater and a/c ducts?
the problem is with the blend door it controls the blend of hot and cold air. there is a small electrical motor that can go bad or they can hang up you will probally have to take some covers off to find out whats going on
The heater and a/c blend door actuator motor is located behind the center of the dash just below the windshield. The steering column must be detached and lowered and the dash must be removed to access the blend door motor.