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Completly Lost

pkucan on Thu July 24, 2008 3:55 PM User is offline

Year: 1995
Make: Lincoln
Model: Towncar
Engine Size: 4.6L
Refrigerant Type: R134
Ambient Temp: 85
Pressure Low: 100PSI
Pressure High: 100PSI
Country of Origin: United States

This was a static check.
Start the car and turn on AC.
Hot air blows and compressor does not engage.
Low and high side climb to almost 200PSI.
I jump the low pressure switch and low side goes almost to zero.
Any help will be greatly appreciated.

brickmason on Thu July 24, 2008 7:25 PM User is offline

Blockage or expansion valve is stuck closed.

Just another brick in the wall

Had a little mule I fed him castor oil and every time he jumped the fence he fertilized the soil

bohica2xo on Fri July 25, 2008 12:33 AM User is offline

100 psi - no clutch > jump cycle switch > clutch engages? Bad cycle switch.

Drop to 5 psi on the low side with switch jumpered? Possible low charge or plugged metering orifice - what was the high side doing when you jumpered the cycle switch & the low side went to 5 psi?


"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest."
~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.

pkucan on Fri July 25, 2008 12:43 PM User is offline

You guys were right. The cycling switch was bad. The clutch cycles about every 5 seconds for about 2 to 3 seconds. It is blowing cool air but not cold. What should the static pressures be and what should they be when running.

Edited: Fri July 25, 2008 at 12:43 PM by pkucan

Chick on Fri July 25, 2008 1:07 PM User is offlineView users profile

You need to evacuate and recharge the system amount back in, static charge just shows you have pressure, but without the pressure temp chart, you don't know if it's full or just gas left in the system.But it sounds like you are almost empty..Hope this helps..

Email: Chick


Freedoms just another word for nothing left to lose

pkucan on Fri July 25, 2008 7:49 PM User is offline

I am going to pull a vacuum tomorrow. If no leaks, I'll be half way home. If leaks I'll be back to square one or two. One question is how do I add PAG or do I have too and how much if the vacuum holds? I guess if I have to replace, say for instance the dryer, do I have to add more PAG?

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