car ac working only sometimes

Just get a pressure test on the AC system and be done with it. If you smell refrigerant inside you probably have a leak in the evaporator coil. The evap coil is inside the dash, it shares the plenum box with the heater core. The condensor is in the front end, sits in front of the radiator. Both could be tested for leaks. Instead of getting 50 different suggestions on what to change, have an AC tech test the system and replace the defective parts.

the problem is different answers is ac working sometimes and not working sometimes , is it problem of compressor or pressure switch ? how to know pressure switch is ok ? there is no leak anywhere , smell is like wet dust , so is it evaporator issue or condensor issue

They both have r134a refrigerant cycling through them, the only way to smell them is if they are leaking. If refrigerant leaked out, the system will stop working and not work again until it's fixed and recharged. If it is intermittently working, then you have a problem with the compressor and/or clutch, pressure readings are out of spec, an electronic fault/sensor, it might even be a faulty AC fan. You need a proper diagnose, take it to a shop that specializes in AC repair, a lot of neighborhood mechanics just aren't equipped for it. FYI, are you SURE you're smelling AC refrigerant/oil? The evaporator coil and heater core (both reside in the Heater/AC plenum box in the dash) can become musty or moldy over time, OR you have a leaky heater core that is giving off a smell as opposed to evap coil.

one ac technician told to change pressure switch . whenever ac button on , ac condensor fan and compressor becomes on , when ac button off , both becomes off , does it mean pressure switch is ok ? smell inside car is like wet dust . one technician told it is related to condesor and need to change . another technician told it is related to evaporator and evaporator need to change

Wet musty smell usually indicates a dirty a/c filter or dirty evaporator. When the system cools it removes moisture from the air and this will mix with dirt. Change the cabin air filter first before you pay someone to troubleshoot your system.

Hi Msajid, I also facing the same problem. when A/C on working and cooling, after some time it is off and later it will on or I have to off the switch and on then again working properly. same problem my car. If you had found the problem please let me know. Thanks

hi a toyota yaris year 200o had a new a/c connector changed as it was old and o good ...now a/c works fine but after some time ... we smelt a smell of gas ...what can this be is it danfgerous to ignore ?

I am summing up that No One here will give proper answer .. Everyone will tell many YABLIYAAN.... and will suggest some non-technical suggestions. So i think it is wastage of time.

I have the same problem with my 2007 yaris. My mechanic told me it was a wiring problem somewhere. Could not find it. Could be thousands more. Already spent nearly a grand on the car. When I start the car it also gives a whine when I turn on. Never did before I had it serviced.

My Dear Friends, There is an inbuilt problem with VITZ or YARIS in compressor, Once it arrives You need to replace your Compressor with a new one or KABLI. I have done it in 13500 and not my Car is more chilled than before it was. Alhamd o Lillah. .... any comments or suggestions about VITZ or YARIS you can contact me at 03004998408 (Dr. Syed Irfan Haider)

Hi IRFAN, Can you please provide more information about Toyota Yaris A/C problem and solution.

Hi irfan I have Toyota yaris 2008.And i am also face same problem in ac.same time work sometime not working. I also check one technician he need to change ac compressor.

I'm also experiencing the same problem with my 2008 Yaris the air con doesn't wanna work properly especially when it's cold it doesn't wanna heat up n I checked everything frm gas to compressor but still its not functioning and lastly what's is the impact of a coolant in a car?? Does it have anything to do with an aircon maybe cos the guy suggested that I put a coolant n lastly does it have to be a specific coolant maybe

My 2010 Toyota Yaris air condition unit is not blowing cold air what could it be

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I had this problem. My mechanic told me to check and see if the AC stops working when Idling and start working when driving higher speeds. He then checked for the wiring and relays of the radiator fan. He found an issue and replaced all wirings of the fan. I have not had anymore problems after that. If your AC stops when Idling there is a big possibility that you have the same problem.