Question about 2004 Jeep Wrangler

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Air conditioner My high and low side on gauges read 60-70lbs and air duct temp 45-50degrees and inlet to evaporator is sweating but outlet is warm. Thanks Don

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There is a little filter screen in the high side line. sounds like it clogged low side 70 is ok high should be around 150

Posted on Nov 16, 2008

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R134a system, low and high side pressures are low (33#-160#) pressure does not rise significantly with hi rpm, warm air, cold line sweats very little, very little drip from evaporator.


Those reading indicate the system is either low on charge or the the compressor is failing, I would do a refrigerant recovery and vacuum it down to 30 inches and recharge it.

Oct 10, 2016 | Cars & Trucks

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Where is the orifice tube located on 88 buick park avenue


Inspect/Test/Replace To raise pressure, there must be a restriction in the air conditioning system. The restriction divides the system into the high side and the low side. The terms high side and low side refer to the high pressure and low pressure within the system.
The flow control can be either an orifice tube or a metering device called an expansion valve. A thermostatic expansion valve controls the amount of refrigerant that is allowed to flow to the evaporator. A temperature sensing bulb on the evaporator inlet controls the expansion valve.
  • A bad expansion valve will cause low readings on both the low and high side.
  • Failure of the sensing bulb is the most common problem.
  • Sometimes the valve can become plugged with debris.
  • If the sensing capillary tube is warm, there is high pressure that pushes on the diaphragm.
  • The sensing bulb checks the temperature of the outlet line of the evaporator.
  • If it is warm, it opens the valve.
  • Pressure on top of the diaphragm tries to push the valve open.
  • The operation of the expansion valve can be checked.
  • Some expansion valves can be cleaned, repaired or adjusted.
f73-15a.gif This system uses an expansion valve as it's flow control device. Some expansion valves are wrapped with insulation. When the sensing bulb is in the evaporator case, it does not need to be wrapped because it stays cold. When an expansion valve is packed in that type of system, it is only to silence the noise that the evaporator makes.

CAUTION
Only EPA-certified technicians can purchase R-12 refrigerant, since proper recovery and recycling techniques are required to prevent damaging the environment. Improper disposal of R-12 refrigerant can result in a fine.

Jun 06, 2012 | Buick Park Avenue Cars & Trucks

1 Answer

How do you install a thermostat on a 2001 suburban?


  1. Standing in front of the vehicle it's on the left front side of engine kind of low.
  2. Be sure to get a gasket as well.
  3. Drain the cooling system.
  4. Loosen the air cleaner outlet duct clamps at the following locations:
    • Throttle body
    • Mass airflow/intake air temperature (MAF/IAT) sensor
  5. Remove the radiator inlet hose clip from the outlet duct.
  6. Remove the air cleaner outlet duct.
  7. Reposition the outlet hose clamp at the water pump.
  8. Remove the outlet hose from the water pump.
  9. Remove the water pump inlet bolts.
  10. Remove the water pump inlet and thermostat from the water pump. Water pump inlet/thermostat assembly location
To install:

  1. Install the thermostat and water pump inlet to the water pump.
  2. Install the water pump inlet bolts.
  3. Tighten the water pump inlet bolts to 11 ft. lbs. (15 Nm).
  4. Install the outlet hose to the water pump.
  5. Position the outlet hose clamp at the water pump. NOTE
    Important: Align the arrow at the throttle body end of the duct with the throttle body attaching stud.
  6. Install the air cleaner outlet duct.
  7. Install the radiator inlet hose clip to the outlet duct.
  8. Tighten the air cleaner outlet duct clamps at the following locations:
    • Throttle body
    • Mass airflow/intake air temperature (MAF/IAT) sensor
  9. Tighten the air cleaner outlet duct clamp screws to 62 inch lbs. (7 Nm).
  10. Fill the cooling system and check for leaks.

Read more: http://wiki.answers.com/Q/Where_is_the_thermostat_located_on_a_2001_chevy_suburban#ixzz1TvIO3kpD

Aug 03, 2011 | 2001 Chevrolet Suburban

1 Answer

How to take the steering wheel off a 1995 2.2 liter pontiac sunfire to change the heater core


Replacing the heater core in a Pontiac Sunfire is a very difficult and complex process. The heater core is kept within the car's heating/air conditioning module behind the instrument panel. So many other parts have to be drained and removed from the car to reach the heating/air conditioning unit that you may be better off leaving this to a professional mechanic--especially one licensed to work on air conditioning units.
Things You'll Need:

  • Wrench
  • Container
  • Air conditioning reclaimer
  • Hose clamp pliers
  • Screwdrivers
  • Heater core
  • R134a refrigerant
  • Recharge service hose
  1. Removing the Core
    • Make sure the car is cool, the front wheels are facing forward and the ignition switch is off. Drain the engine coolant by removing the drain plug at the radiator and letting the coolant pour into a clean container, then do the same at the engine block's drain plug. Recover the refrigerant by connecting an air conditioning reclaimer to the system high and low side fittings as its instructions state.
    • Disconnect the evaporator lines to the evaporator by removing its bolt and disconnect the heater hoses from the core by loosening the hose clamps with clamp pliers. Remove the drain tube from the evaporator case. Disconnect the negative battery cable.
    • Remove all the trim covers and panels from the instrument panel; some of these are screwed on and some require a flat bladed tool. Remove all air distribution ducts from the panel, the air bags, the steering wheel, the radio, the tilt and washer levers and all electrical connectors, then unscrew and remove the instrument panel from the car. Unbolt the cross vehicle beam, remove its wiring harness and remove the beam.
    • Remove the air outlet in the floor. Disconnect the wiring harness for the heater/air conditioner and the electrical connectors at the blower's motor and resistor.
    • Remove the heater/air conditioning module by removing its attaching bolts and the assembly screw. Remove the heater cover case by removing its heat stakes and screws and remove the heater core.
    • Install the replacement core into the heater/air conditioner module, then re-connect the heater core cover case. Install the assembly in the vehicle, aligning the mounting bracket to the front of the dash slot and mounting bolt hole. Reconnect the electrical connectors and wiring harness and install the floor air outlet.
    • Reinstall the cross vehicle beam and every component of the instrument panel. Reconnect the negative battery cable.
    • Install the drain tube back on the evaporator case. Connect the hater hoses and the evaporator lines.
    • Recharge the air conditioner. Connect a can of R134a refrigerant to the air conditioner's low side service fitting with a recharge service hose and a high pressure gauge to the high side fitting. Open the service hose valve while the car runs with the A/C at the max and let the vapor flow until the gauge reads between 225 and 250 PSI.
    • Refill the cooling system at the radiator filler neck. Use fresh coolant if the old liquid is dirty in any way



Dec 11, 2010 | 2005 Pontiac Sunfire

1 Answer

Want to add refrigerant. air conditioner not very cool. which is low pressure port for adding r134a coolant?


The newer cars have 2 ports. The large port which is the high side and small port, low side. The kit you buy to refill the air cond will fit only one of the ports and that's the small port. You don't want to hook up on the high side so, this is why ports are sized and the gauge will only fit one. The low side should be near the evaporator or on the evaporator.

Aug 11, 2010 | 2001 Dodge Grand Caravan

2 Answers

Recharging the air conditoner on my 4 cylinder 1996 Dodge dakota.


on the low side 35-40 psi. you really should charge by weight, then you KNOW its got the correct amount in. the way to partial charge is feel the inlet pipe and then the outlet, when the charge is full, they will be the same temp.

Oct 09, 2009 | 1996 Dodge Dakota

2 Answers

Air conditioner in 1999 mercury tracer won't work. It's not the compressor nor does it have a leak. what could be the problem?


the tracer is the same as the ESCORT, right?? TRY THIS--I WORK ON PLENTY OF ESCORTS--LOOK UNDER THE AIR CLEANER/CONE ASSEMBLY--THERE WILL BE A BLACK METAL BOX(FULL OF RELAYS) ONE OF WHICH IS THE A/C RELAY--TRY TAPPING ON IT WITH A LONG SCREWDRIVER OR SOMETHING SIMILAR WHILE U HAVE THE A/C ON. IF THE A/C SUDDENLY STARTS WORKING U NEED TO GET A NEW RELAY BOX(I THINK ITS CALLED A GEM MODULE) i do have a question- does the blower motor work?? how do u know the compressor is good??do you have 12 volts going to it??? this relay box is pretty common to go bad--u have to remove the air cleaner in order to get to it.get back to me.

Sep 07, 2009 | 1999 Mercury Tracer

2 Answers

2000 VW Beetle 2.0L the air conditioner was blowing warm air, the shop replaced the expansion value, evacuated and filled with freon. the air conditioner blows cold while driving but warms up while...


at idle most a/c get warmer as they are not under load to circulate the freon at a rapid pace
changing the dryer is wasting your money won't change anything sounds to me as if there might be a vapour lock in the system. run the car for a week with a/c on max to fully circulate freon to see if the problem goes away if not go back to the shot tell them to check system with gauges on the high and low side to make sure that it infact is properly charged with the right amount and temp.
42-54 degrees is good

Jun 30, 2009 | 2000 Volkswagen Beetle

1 Answer

I want to recharge the air conditioner on a 1992 crown vic


find your evaporator inlet outlet lines on the fire wall usually near heater core inlet outlet lines. then follow both lines until you find the one that goes to the compressor. that is your low side and the port should be on there

Jun 26, 2009 | 1992 Ford Crown Victoria

1 Answer

Air conditioning


On a w body car with a single temp adjustment control (not a dual zone) your problem should be a low refrigerant charge. Due to the design of this evaporator, a low refrigerant charge will cause the furthest areas from the inlet and outlet hoses (the drivers side) to not remove the heat from the incoming air. This allows the air on the drivers side to be outside temp but refrigerated on the passenger side. In cars with Dual Zone controls you must not only verify the refrigerant charge level, but also check the mode doors which control the air flow and regulate the temp. To check the refrigerant level do not use pressure gauges alone. Verify a proper charge level by checking the temperature of the two aluminum lines going in to the firewall of the vehicle. With the A/C set to high the temperatures should be within 5 degrees of each other. If not, then there is a charge issue. I hope this helps

Jul 11, 2008 | 1999 Pontiac Grand Prix

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