Question about 2001 Oldsmobile Aurora

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AC compressor relief valve opening

Just replaced the AC compressor, dryer, pre orfice filter and condenser.
Very hot outside, 100 degrees, charged system and seems neither cooling fans fail to operate when AC cooling selection is made. Thanks Rodger

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6 Suggested Answers

  • 625 Answers

SOURCE: intrigue AC?

if you have the filter missing you a/c evaporTOR MIGHT GET DURT AND decrease the air flow, but the cooling should be ok
is it blowing hot air? or the air flow is low?

Posted on Jun 17, 2008

Molson02536
  • 3854 Answers

SOURCE: compressor clutch does not engage--100 psi in system-

Here is a link that i hope will help you. Keep me posted and be glad to help you but i am on my way out. 
Good luck and hope this helps.http://www.cyberbright.com/autobin/air_conditioning.htm

Posted on May 30, 2009

  • 14 Answers

SOURCE: a/c compressor won't engage and the cooling fan not operating

The cooling fan does not come on until the engine temp reaches 229 degrees. it is controlled by a cooling fan relay. Cheeck for power at the fan motor and check the relay. The A/C. If yuor a/c system is low on freon the low pressure switch on the accumulator will not complete the circuit for the clutch. Check the charge, voltage present at the clutch or the low pressure switch. You can install a jumper in place of the switch to test.

Posted on Mar 29, 2010

  • 14 Answers

SOURCE: a/c compressor won't engage and the cooling fan not operating

I have the same car. The cooling fan activates at 227F. Only one fan will engage at this temp, the other one[closer to the A/C compressor] won't engage unless the A/C is working. Try charging the system with half a can of refrig. It'll be tough retrofitting to R-134A, the LOW PRESSURE connector is under the air box pointing sideways about an inch from a large bracket. Try and find a 90 degree adapter of some type and go from there.

Posted on Jul 13, 2010

  • 1 Answer

SOURCE: Ac/temp will not change from heat to a/c

what will cause my 2000 bravada not to start but will still try to turn over

Posted on Sep 01, 2010

  • 1 Answer

SOURCE: ac blowing hot air. System was charges,

Sounds like your blend door actuator is not functioning.
It probably has a broken arm which moves the door to allow cold and or hot air.
Do some research on how to fix it.
You may have to remove the dash.
You will need much patience.
I wish you well.

Posted on Nov 21, 2011

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2005 XG350 ac blows hot air not cold dealer installed new compresor, and belts blows 70 degree air at dash grills


A system will only drop temp about 20 degrees from outside temp. I would have then recheck the Freon level again. To much is as bad as to little when it come to Freon. Also the oil level can be to high causing the same thing. When they changed the compressor they should have also replaced the dryer and the orfice tube/screen. If that wasn't don't you could have a obstruction in line.

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The clutch on the a/c compressor is shot. I was going to replace the compressor. Do I need to also change the accumulator/receiver dryer, and or the condenser too? It is a 1996 Ford Explorer, Eddy...


You need to change the dryer and orfice tube. You should also flush the evaporator, lines and condenser with an approved ac flush. Add the proper amount of refrigerant oil to the system and pull a vacuum and charge it.

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My ac was blowing fine and cold until my ac compressor went out. i bought a used ac compressor wit new dryer/accumulater, and orfice tube. i had that for awhile and i replaced it again because the air...


If the car was retro fitted with R134a this was a common problem. There was a low side pressure sensor that needs to be changed. R134a runs different pressures than the r12.. When you go down the road the condenser cools off the system and the pressure drops below the minimum pressure. You need to make sure that the system is fully charged, not just cold to the feel. Both pipes coming out of the firewall need to be the same temp. this makes sure that the evaporator is flooded.
I hope this helped. Re-post if you need more info. Have a nice day and good luck.

Jun 06, 2011 | 1993 Cadillac Eldorado

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I have repleced my ac compressor and vacume the system. however the compressor will only engage with A JUMPER WIRE. what else should i check?


this is just a thought, i suspect that you have a clogged orfice tube filter. it will not accept a charge if the filters clogged. any autozone or advance auto parts has the complete manual for $28.00 BUT if the manuals open,you can research the manual instore for free. just ask the clerk for position of the orfice tube filter in the a/c system if the compressor only enguages with jumper wire suggests the systems low on freeon,or a clogged orfice tube filter.technical solution::restriction in the a/c system. thank you for choosing fixya.com.

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Hey I am haveing a problem with My 2500HD ac system. I have changed The Condensor, evaporator, and the Compressor. I have charged it to the correct levels. It blows cool air, but it doesn't get cold....


Did you change the Receiver/ Drier and the Orfice Tube/ Expansion Valve? The Receiver/ Drier takes moisture out of the system and the Orfice Tube/ Expansion Valve controls the Hot/ Cold air. If that is bad it may not be opening or closing fully which would not let your A/C get as cool as it supposed to.

Jun 25, 2010 | 2005 GMC Sierra 2500HD 4WD

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My ac compressor locked up. What needs to be


I would suggest leak testing it you can take hose with clamps to the outlet and put a psi gauge on it then hook a compressor to the other end with a hose with clamps. This will show you if you have any obvious leaks you dont need alot 10psi and hold as long as you would like atleast a min you can also spray it with soap bubles to be sure. the condenser if its not leaking would be fine with a flush.

Apr 06, 2010 | 1998 Chrysler Town & Country

1 Answer

I have a 99 chevy suburban 2500 with rear a/c. i installed a new compressor and orfice and a rear expension valve with acumilator. Also recharged. it only cools at 60 degrees down the road. At idle its 70...


What is the ambient or outside temp? A drop of 30-40 degrees is considered normal. And did you evacuate the system to remove the air? This is a must to get 100% efficiency. Another cause is too much oil/stop leak/or leak detector can affect efficiency

Jul 29, 2009 | 1999 Chevrolet Suburban

1 Answer

Ac compressor does not turn on when car has been sitting & it's hot outside. Works fine in the morning.


either the freon charge is about 1/3 low, or the expansion valve needs to be replaced. Freon is getting into the evaporator, but not in great enough volume to cool the air unless it is coming in cool to start with. check your ac charge, and if it is full, then have it emptied, change out the expansion valve, and recharge it

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1 Answer

A/c compressor runs with dash switch off then loses freon from relief valve


we can solve this, but i need more info, a/c compressor should not run with the dash switch to off, so there could be a short in the switch or something is powering your a/c compressor.

another thing is the gas being relieve to your relief valve, your condenser fan could not be running there by creating a high head pressure to relieve on the relief valve or the valve could be open already and not the type where it seats back if the pressure is already low.

are you just putting gas right now as these things happens?

if so, you could have a clogged in your system, building a high head pressure to relieve in the valve.

the clogged could be in the filter dryer, or the expansion valve inside the evaporator coil.

tnx 4 using fixya,


drcool

Sep 28, 2008 | Chevrolet Crew Cab Cars & Trucks

1 Answer

Ac compressor oil


First off is your compressor pre-lubed? to find out, remove shipping caps from ports and tip to side and see if any oil comes out. As a rule of thumb, The oil is sold in a small bottle pre measured for the entire system. 1/4 bottle per item (compressor, evaporator,condenser, and filter/dryer) The label showing cc's will do fine for your oil needs as the system will find its own level once activated. Oil continuously flows througout system. Need I remind you that when replacing compressor you should also replace filter/dryer so you do not repeat this job in two months.

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