Question about 1997 Chevrolet S-10 Pickup

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AIR CONDITIONING A/C ONLY BLOWS HOT AIR,SYSTEM FULL ,COMPRESSOR RUNS,PRESSURE ON LOW SIDE VERY HIGH--,REPLACED COMPRESSOR AND ACCUMULATOR--HELP

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  • yroj28 Sep 05, 2008

    4.3 l,auto,4x4

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Have you checked the orfis tube also called expancion valve also posible you got a bad compresor . have been there on getting bad parts 50 years experince.
joss605

Posted on Sep 06, 2008

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Where exactly is the high pressure switch located...my A/C is blowing warm air...I jumped the low pressure switch on the accumulator and the compressor cuts out at 40...on the gauges...


If the high side switch was bad, the compressor would come on at all. The low side is only on with the compressor running. You need a set( high and low) gauges on it to determine the problem.

Oct 25, 2015 | Cars & Trucks

1 Answer

1995 Buick Century blowing hot air.


A mechanic would check the system with a set of pressure gauges. If the compressor is running, the low side would read around 30psi and the high side would be around 250psi. That is how you know if the system is full of freon or not.
You may have to get a professional diagnosis to proceed. If you replace the compressor, the accumulator needs to be replaced and a vac pump is used to pull all of the air out before the freon is added.

May 07, 2013 | 1995 Buick Century

4 Answers

A/C is blowing hot air. Freon is full, compressor


Not sure how you know if the freon is full without the unit running. There are a number of switches which can keep your A/C from coming on. There is a low pressure switch which is usually located on the larger line and sometimes located on a silver cannister (called an accumulator) which is the low side of a compressor circuit. There is also a high pressure cutout which is usually located on the back of the compressor unit. Both of these switches can be jumpered out to see if they are the reason for the compressor not working. You remove the two wire connector to either switch and place a small jumper wire between the two wires on the connector block. The other reason my be a low idle cutout switch and this will also usually be located near on on the compressor. You can also test it the same way as the other switches. If it is the low pressure switch then of course you will need to add freon which you can purchase from any auto parts store. They usually come with instructions and all the equipment needed to add in freon. If it is high pressure, then some of the freon should be recovered from the system by a technician. If is the low idle cutout then you will have to take it to a mechanic to understand why it is idling so low. Hope this helps.

Jul 16, 2010 | 2004 Kia Sedona

1 Answer

Air condition blows hot air but it has freon


You may have created an over charged condition and at this point the a/c compressor will cut off on high head pressures. This can be verified by installing gauges to the systems high and low side service taps and reading the pressures.An overcharged system will start the compressor briefly but soon cuts off once pressure goes to 350 - 400 lbs on the high side. Acceptable pressures for this system should be no greater than 250 high and low suction should drop to 40-50 psi.You might recover the charge and evacuate the system,then try bringing the charge back to proper level.A sight glass in the reciever drier really helps determining proper fill.Once all bubbles have dissipated from the sight glass during charging ,one should stop at that point to avoid overfilling.Too much freon is worse than a low charge especially in hot ambient conditions....

Aug 26, 2009 | 2003 Saturn ION

3 Answers

96 gmc jimmy a/c


The condensor (or dryer) needs to be replaced if its older and especially if the compressor has not worked is several months or more..
As a matter of fact - allot of the time whn you buy a compressor they will not waranty it unless you buy a dryer too..
Also - be sure the compressor is getting power..

Rate well ;o)

Jul 24, 2009 | 1996 GMC Jimmy

1 Answer

2002 Chevy Tahoe, started with rear a/c blowing warm/hot air, then it started working again. Now both rear and front a/c blows warm/hot all the time. All speeds seem to be working in front and back....


sounds like a leak. Have your system checked for leaks and re-charged. If the system is full of refrigerant, then check the pressure switch on the compressor and the pressure switch on the accumulator (dryer). If the pressure in the system is low, these switches prevent the compressor from running to prevent damage.

Jul 16, 2009 | 2002 Chevrolet Tahoe

1 Answer

The air conditioning blows only hot air


Is that your static pressure readings??? If that is your static pressure readings that's good. When the engine running and fan on high and a/c compressor clutch engaged you should have 25 to 35psi on your low side and 200 to 350psi on your high side. If the clutch is engaged and that is your readings, replace your a/c compressor. Keep me posted, be glad to help.

Jun 29, 2009 | 2003 BMW Z4

1 Answer

The air conditioning in my 2008 Buick LaCrosse does not work.


Need clarification...
Does the compressor run steady, cycle on and off continually or even come on at all? If cycles on-off then attach charge manifold/gauge set and bring freon up to proper level. If does not come on at all, then start engine, turn a/c on, remove two-wire plug from low pressure cut-out switch mounted on accumulator. Jumper the wires at plug and see if compressor comes on. If so, bring freon up to proper level.

If charge level was low then check for system leak after system charge with an electronic leak detector if available.

If compressor runs but doesn't cool vehicle then with engine running and a/c on feel (carefully) the lines. High side line should be hot (be careful) and low side line should be cold. If these are both true then it's possible non-cooling condition is due to air temp diverter door not operating or heater valve not shutting off (if so equipped). If low side not cold it could be a plugged orifice tube. If high side not hot it could be bad rings on compressor. Both conditions can be diagnosed with a/c manifold gauge set by noting the pressures.

For safety... if not familiar with differences between hi and low side components or with charge equipment then please take vehicle to qualified person for service.

Jun 22, 2009 | 2001 GMC Yukon

2 Answers

1993 buick century


Heater Control Module

May 31, 2009 | 1993 Buick Century

1 Answer

Air condition


Check the cooling system, particularly the radiator to make sure it is not partially plugged. Additionally, check the radiator fan for proper operation. If the engine temperature is running way above normal, some of the heat is transferred to the air-conditioning condenser, which causes the air-conditioner to lose efficiency. As for your question about a "limiter" switch, there is a high-pressure switch in the air-conditioning system that cuts the compressor out when the pressure gets too high.

May 19, 2008 | Mercury Marquis Cars & Trucks

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