Question about 1994 Audi Cabriolet

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A/C unit not working. Unit has gas and apparently no leaks. The compressor is turning, so assume gas is present. Pipes do not get cold and obviously no cool air into the car

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Poss needs gas recharging a/c needs to be used every week for about 15 mins to stay at peak.not cheap or diy...

Posted on Feb 19, 2010

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Posted on Jan 02, 2017

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2002 lincoln continental makes loud noise when take foot off the gas. A/C not working even though worked fine last summer. Can feel heat coming off dash around steering wheel.


What you MIGHT be hearing, is a vacuum leak, through a cracked or broken hose or fitting. Without vacuum, the "dampers" in the A/C system will not route the cold air to the right places in the car interior. Is the compressor clutch engaged, and turning the A/C compressor? If, not, you may be low on refrigerant!

May 15, 2017 | Lincoln Cars & Trucks

1 Answer

I have a Carrier 38QCA036 and was wondering if there is any model I ca replace it with, without changing all the pipes ect


if the unit you want to replace it with uses the same gas then there is no need to change out the pipes
if the replacement unit uses r312 gas the pipe fittings are a different size so new pipes will be used as there is a higher operating pressure ( pipe wall thickness will be larger)and to stop people mixing gasses and compressor oils different fittings are used
so look at the models and see what gas they use

Nov 13, 2016 | Cars & Trucks

1 Answer

My ac is on but not cooling but it was working until no cold air is coming


The most probable cause is loss of gas. Check on the outside unit. Feel the pipes, one of them should be very hot, the other very cold. If not, get a service guy to replenish the gas and check for leaks.

Mar 13, 2015 | AC Cars & Trucks

1 Answer

Hello, Am sure your day is good. I had earlier raised this concern:I have a challenge with the AC system of my 2007 Volvo XC90. When the AC is turned on, its cools outside(bur net area) around the pipes...


I am concerned that what you have been told may not be exactly true. If the pipe to the inside of the car from the ac compressor is frosting up ( water condensation) then it has a low pressure area which indicates that the gas is getting through the evaporator ( bit inside the car). If the evaporator was blocked then the low pressure switch would switch off the ac compressor (low gas/no gas)
because the gas could not get past the blockage then the high pressure switch would stop the compressor because of high head pressures which can damage the compressor.
The most logical thing is that the TX valve is partially blocked or the thermostat setting is wrong.preventing sufficient gas flow into the evaporator to cool the car.
If you car has a climate control system then that unit may need checking. Best have an accredited ac specialist shop check the system
And to answer you question as to possibility of flushing or cleaning or washing out the evaporator. this is not a possibility as there can be no moisture what ever inside an ac system. However you can check if the cooling fins on the evaporator are blocked with an oily type dust then you can use an ac fin cleaner . This will allow the air to pass through the evaporator fins and help boil off the gas from the TX valve.

Dec 30, 2014 | Volvo Cars & Trucks

1 Answer

Heater blows cold


ok if it is a reverce cycle airconditioner theres either a problem with reversing valve, gas has leaked out, compressor is blown or a possibe pc board depending on make/model/age of the unit.

if it is a gas heater it could be a possibility its the solenoid valve that controls the gas flow,


NEED MORE INFO

Oct 31, 2012 | Hyundai Cars & Trucks

1 Answer

The a/c unit comes on cold then it blows hot air whats wrong


either low on gas ,or a fault with the flaps?? check the pipes in and out just behind the bulkhead where the ac pipes goe through and their should be a restrictor valve that only allows a small amout of gas through and this causes the cold ,check these pipes ,one should be hot and the other cold ,if when you start up they are correct then nothing then its a faulty restrictor valve ,or the compressor ,if they stay hot and cold then its a problem with the heater controls or the clima computer if it has one ,also check the fan is coming on when the ac is turned on because if its not then its not cooling the gas in the rad and it will shut off the pump ,then it will not cool ,just like you describe

May 22, 2010 | 1995 Lexus ES 300

2 Answers

Air conditionerdoesn't cool....added freon....compressor seems to


if heater not turning off just put a clamp on one of the pipes ,come on this car is eleven years old is worth spending all that cash when a simple brake hose clamp will suffice ,or join the pipes together with a piece of 15mm copper pipe

Apr 08, 2010 | 1999 Chevrolet C/K 2500

1 Answer

Air con compressor not working i need to know


Do not play with this vehicle,if AC not working then take to a dealer or someone who understands jags ,these systems use a lot of complicated sensors and pressure detectors ,and they always leak gas and need rechecking once a year .The pipes go porous,the O ring seals play up and often the thing will just dump the gas out of the compressor for no obvious reason ,except to us that repair them ,its caused by the fan not coming on when the AC is turned on and it builds up too much pressure and ,this is caused when one of the these pressure sensors switches play up

Oct 21, 2009 | 1994 Jaguar XJ6

1 Answer

A/c is blowing hot air


Hi

Wel I am not a mechanic or anything, but i haev had some experience with aircons. The one problem might be that there is a leak in the pipes. 9 out of ten times the leak is where the various pipes join. you can simply take a spaner and tighten them otherwise the leak maybe where the compressor is. if the pipes were blocked then it will not blow any cold air and you said it did blow cold air for a while. the way to find a leak is take soap water in a spray gun and spray the soap water in on the pipes and joints, this should blow a bubble where the leak is. however this can only work if you have gas in the compressor. so fill in more aircon gas first.
hope i am right.

Thanx

Sep 21, 2009 | Chevrolet Cars & Trucks

1 Answer

Ac not working


if you by passed the relay and clutch engaged then this shows that pump works ??but was it getting cold on and around the restrictor valve where the pipes enter the cab is normally a valve block but american monsters use a valve in the pipe for cooling and if its not getting cold their or blowing cold inside cab then system needs re-gassing with R 134 gas if its an older system with R 12 gas then it will need to have adaptors fitted to valve connections and refilled with R134 gas.The main cause of A/C system loosing gas is porosity in the rubber flexible pipes also the back seal on the pump.Or just regass and put a leak stopper in the system

Sep 01, 2008 | 1998 Chevrolet K1500

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