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Compressor cuts off with RPM

frogallen on Tue April 13, 2010 11:12 PM User is offline

Year: 1995
Make: Ford
Model: Thunderbird
Engine Size: 3.8
Refrigerant Type: R134a
Ambient Temp: 70
Pressure Low: 35
Pressure High: 220

Ok this is making me nuts.

I had a second vehicle not being driven and decided to put the AC in the driver.

Swapped the compressor, drier, liquid line and condensor over.
Would not take a charge after pulling vac.

Maybe the drier is back so get an new one.
Ok after pulling vac again, it still doesn't like to pull enough freon. Jumping switch turns compressor on, low side reading low, around 15 and freezing the line. Stopped after reading something is clogged and could burn out compressor.

So get a new liquid line thinking the orifice tube is junked up.
Same process. However could get enough in to keep low side around 35 but high is around 210. As soon as you get off idle the pressure rises and kicks the system off.

The orifice tube looked fine by the way.

So now what? Is the evaporator next? Too much oil in system?

When I pulled the drier I drained it and it had 2 ounces of oil in it. Compressor had 1. So I put 3 back in the sytem from fresh.

I'm lost.


Chick on Wed April 14, 2010 7:20 AM User is offlineView users profile

Are your fan's working properly? High side is high for 70 air flow or blockage comes to mind...Try filling the correct charge while wetting the condenser for starters and see if the pressures are normal...

Email: Chick


Freedoms just another word for nothing left to lose

frogallen on Wed April 14, 2010 10:46 AM User is offline

Fans are good. Forgot that.

I will wet the condenser and see what happens.

Post back new pressure numbers too.

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