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1987-1993 Special Service Mustangs The aero cars.

 
 
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Old 06-18-2010, 11:35 PM
Unmrkd's Avatar
Unmrkd Unmrkd is offline
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Toshi, my guess would be that the system has bled down from leaking seals at the line connections and or compressor seal. With low pressure in the system the compressor clutch will not engage. There is a pressure sensor switch atop the dryer canister/line on the passenger side of the firewall that prevents the clutch from activating if the pressure is too low. It's a safety switch to prevent compressor damage.
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Gregg

'89 FHP Unit # 435 (Deceased)
'89 FHP Unit # 1526 Troop H (Madison)SOLD 12/3/13
'89 SCHP Marked Unit # 2-12-80 SOLD 6/21/15
'88 SCHP Unmarked Unit # 2-12-23 SOLD 9/3/12
'90 MSHP Marked Unit # P-162 Plate # 642-HP SOLD 12/17/11
'88 MSHP Marked Unit # P-162 Plate # 642
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