car ac working only sometimes

30

Asked by Mar 25, 2017 at 10:21 AM about the 2007 Toyota Yaris Base

Question type: Maintenance & Repair


my yaris 2007 car ac stopped working before 2 months slowly , means
sometimes work and some times doesnt work , and not at all . before 2
weeks i showed 2 car ac tachnicians both told to change control valve in ac
compressor . it is changed now and put new freyon gas and comprssor oil ,
now sometimes work sometimes doesnt , and also little smell inside . ac
technician told to replace the compressor and evaporator . so i met another
ac technician , he told to change ac pressure switch . again i met another
ac technician and he told to change ac compressor , clean pipes and
change condensor or ac radiator . Now i want to know
1) is it compressor problem or ac pressure switch problem ? (sometimes
work and sometimes doesnt)
2) smell is because of evaporator or condensor ?
3) sight glass of ac is not clear and dark , and technician told condesor or
ac radiator need to change . is it required to change condesor ?

7 Answers

37,965

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.

30

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

2 people found this helpful.
37,965

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.

1 people found this helpful.
30

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

1 people found this helpful.

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 ?

Your Answer:

Yaris

Looking for a Used Yaris in your area?

CarGurus has 716 nationwide Yaris listings starting at $2,795.

Postal Code:

Toyota Yaris Experts

  • #1
    Justin Kleven
    Reputation
    170
  • #2
    dandyoun
    Reputation
    160
  • #3
    Tom Demyan
    Reputation
    130
View All

Related Models For Sale

Used Toyota Corolla
99 Great Deals out of 4,166 listings starting at $2,950
Used Honda Fit
18 Great Deals out of 478 listings starting at $3,495
Used Honda Civic
123 Great Deals out of 4,669 listings starting at $1,655
Used Toyota Camry
36 Great Deals out of 2,122 listings starting at $2,450
Used Toyota Prius
209 listings starting at $4,495
Used Nissan Versa
6 Great Deals out of 360 listings starting at $1,995
Used Toyota Matrix
20 Great Deals out of 362 listings starting at $1,690
Used Toyota RAV4
94 Great Deals out of 4,243 listings starting at $958
Used Hyundai Accent
35 Great Deals out of 1,273 listings starting at $1,200
Used Honda Accord
38 Great Deals out of 1,652 listings starting at $3,490
Used Hyundai Elantra
73 Great Deals out of 3,989 listings starting at $3,490
Used Nissan Sentra
39 Great Deals out of 1,803 listings starting at $2,995
Used Mazda MAZDA3
48 Great Deals out of 2,848 listings starting at $2,950
Used Ford Focus
52 Great Deals out of 2,676 listings starting at $998

Used Cars For Sale

2018 Toyota Yaris Base For Sale
6 listings starting at $17,320

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.