Question about 1993 Volvo 940

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Air condition 93/940

AIR CONDITION STOPPED WORKING,FAN BLOWS OK,COMPRESSOR
WORKS WITH DIRECT POWER.WHERE CAN BE THE PROBLEM.
APR
ECIATE ANY HELP YOU CAN PROVIDE. PETER.

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I HAVE REMOVED TEMP CONTROLL UNIT FROM DASH,TESTED CIRQUIT BOARD AND FOUND
ONE SOLDER SEPARATED FROM BOARD AT THE SMALL RELAY'S LEG. PUT IT BACK TOGETHER AND NOW IT WORKS LIKE A CHARM. REMOVING THE CONTROLL UNIT WAS THE MOST DIFICULT JOB TO DO.LOTS OF THINGS TO REMOVE,LOTS OF SCREWS AND SHARP EDGES.IT IS DONE.

Posted on Oct 14, 2008

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Air connditioning


  1. Ann, could you be a little more vague? It will be necessary to know some details before anyone can help you. Make, model, etc. does the fan blow air of any temp out the vents? Does the compressor turn? Check that the compressor drive belt is not broken. On a modern car there will be only one drive belt for the power steering, air conditioning, alternator and water pump. With the engine running if you do not see a belt turning I advise not driving the car until you can have it replaced as the engine could over heat and cause serious damage to the engine. If you are not familiar with underhood workings I have linked a youtube video that may help you find the belt. Start at 2:33 on the video. Good luck.
How to Fix Squeaky Belt figure out where the squeak is coming from

Aug 26, 2016 | Cars & Trucks

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Hot air from AC vents. Sometimes the system is working ok though.


That is not a whole lot to go on. I would recommend gathering some more information like: WHEN and under WHAT CONDITIONS does it work? WHEN and under WHAT CONDITIONS does it NOT work? When it stops working, is the radiator cooling fan working properly? When it stops working is the A/C compressor clutch engaged and the compressor running? Will it start working again if you cycle the temperature control to HOT then back to COLD again? Will it start working again if you turn the A/C system off for a few seconds, then turn it back on?

All of these things can be clues to what is going on with your system. This information can be EXTREMELY helpful in pointing you in the correct direction to getting it fixed without wasting your money on a bunch of parts that don't fix the problem.

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The AC on my 2002 chevy S 10 just suddenly stopped blowing cold air. The freon is full and the compressor is coming on. Any advice would be helpful in this Texas heat. Thanks


If the freon is full and the compressor clutch is working,is the blower working, need more details, if it is, you could have a blocked orifice filter. or a bad high pressure switch located at the rear of the compressor.if the high pressure switch loses voltage or goes out, your cool air will come to a dead halt. check the high pressure switch for voltage. good luck!

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1 Answer

Ac fuse blowing, in 1996 isuzu rodeo


Disconnect wire to Air Conditioning Compressor and connect normal test light to wire, from engine harness(body)side. Fit new fuse and try air cond controls and switch, test light should light up and hopefully fuse wont blow indicating short in compressor clutch windings(replace compressor). If fuse blows while doing this test compressor might be ok and fault short some where else, fan speed resistor block, fan or control/switches, wiring.

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1 Answer

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If all fuses are ok then check wiring to fan and compressor both, if wiring is also ok and current is passed till the terminals then you have two problems, one the magnet forming coil on the compressor head is burnt, you have to replace or get it repaired. second your fan itself needs checking.

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1998 honda accord ex air conditioning not cool


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MY HVAC fan stopped blowing. Checked all the


Check the blower motor speed control resistor pack is ok.
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Check condition of electrical connection terminals on the blower motor circuit - these terminals pass considerable current and over time may fatigue overheat and loosen.
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Oct 08, 2009 | 2003 GMC Sierra

1 Answer

Air Conditioniong not working


U may be low in Freon gas.
When Freon is low there's low pressure switch that will prevent A/C compressor clutch from engaging to protect it from failure.
So, first check Freon pressure & any leaks form lines & hoses fittings.
Even if the fan is working, that doesn’t indicate proper compressor OP'S.
Look at the compressor front side you'll see the clutch stationary while the AFT pulley moving.

Then put air-condition compressor switch to ON (Engage),
You should see the clutch engage & start rotate,
If NOT, this is very clear indication u r low in Freon.

Regards;
MAR

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1 Answer

Air conditioning electrical diagram for 2004 kia sedona


I also have a 2004 Kia sedona with approx. 80,000 miles on it. The air conditing system stopped blowing cool air into the car. The fan would work, but would not blow cool air. After doing a lot of research. After trying to find a car repair manual or diagrams for the Kia Sedona with no luck. We ended up taking it to our machanic. He then replaced the compressor and it is working fine now. I now know that this is common for the compressor to go out on this van.

Danny

Jul 02, 2008 | 2004 Kia Sedona

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