Weak AC on idle, but gets back to normal when car is running

[poorprince]

That's exactly my recent concern. Car is cool again when running, but no coolness when in idle mode (like AC is 50% off and FAN only). Do i need to replace parts, clean system etc? thank you very much tsikot experts

[_Cathy_]

I had the same problem with my Corolla. It loses cold air when the car is running slow or idling.

The AC shop replaced the Aux fan and it fixed the problem.

[alfonsomiguel]

That's exactly my recent concern. Car is cool again when running, but no coolness when in idle mode (like AC is 50% off and FAN only). Do i need to replace parts, clean system etc? thank you very much tsikot experts

Sa case ng Honda City 03 namin, ok naman yung fan at may freon naman. Palit ng expansion valve. Backgound: Bagong linis sya at bagong filter-dryer. After 1 month naging hilaw na, cool when running but no cool when idle. Buti pede dukotin expansion valve na dina ibababa ang evaporator..

[poorprince]

thank you sir and mam! my car is a Civic 99 EK. will check the aux fan, but the prob with Civic EKs is the aux fan doesnt automatically spin when you turn on the AC, you'll have to wait for a few minutes when it reaches a certain temperature for it to engage. anyways will check, otherwise might be an expansion valve as mentioned.

[non-vtec]

thank you sir and mam! my car is a Civic 99 EK. will check the aux fan, but the prob with Civic EKs is the aux fan doesnt automatically spin when you turn on the AC, you'll have to wait for a few minutes when it reaches a certain temperature for it to engage. anyways will check, otherwise might be an expansion valve as mentioned.

That's weird. Aux fan should turn on when the compressor is on. You might have a problem with the wirings. It could have been tampered or modified before.

[poorprince]

That's weird. Aux fan should turn on when the compressor is on. You might have a problem with the wirings. It could have been tampered or modified before.

yes, the aux fan turns on when the compressor engages, when it disengages or i think what they call "trip-off" (clicking sound), the aux fan goes off. Aux Fan Spins again when Compressor re-engages. Same thing with the radiator fan, only spins when reaching a desired temp, then turns off, to save energy perhaps? is my setup ok? thanks!

[colt]

I have the same problem. I had the following parts replaced: filter drier, condenser, evaporator to laminated, expansion valve. A/C cleaning done and flushed. Pressure reading on compressor is normal. Radiator fan is working fine. I also added a 3rd aux fan in front of the condenser.

Kindly advise po kung ano sa tingin ninyo ang pwede pang gawin.

BTW, when car is running at least 30KPH a/c temp can go down up 2-3 degrees C. But when car is idle, it can hardly reach 10-12 degrees C.

I am using a pen type thermoter to monitor the air coming out of the center a/c vent

[funkeemunkee]

yes, the aux fan turns on when the compressor engages, when it disengages or i think what they call "trip-off" (clicking sound), the aux fan goes off. Aux Fan Spins again when Compressor re-engages. Same thing with the radiator fan, only spins when reaching a desired temp, then turns off, to save energy perhaps? is my setup ok? thanks!

Ideally, dapat sabay na mag-actuate ang condenser at rad fan when you turn on your aircon. Maybe that's why bitin ang lamig pag idle. You can have the electricals hacked para magsabay na yung dalawang fan. Mas buo lamig pag ganun kesa dun sa rad fan na nag-actuate lang pag init na ang makina. Pa-check mo na lang entire AC system para wala nang tsambahan sa diagnosis.

[non-vtec]

yes, the aux fan turns on when the compressor engages, when it disengages or i think what they call "trip-off" (clicking sound), the aux fan goes off. Aux Fan Spins again when Compressor re-engages. Same thing with the radiator fan, only spins when reaching a desired temp, then turns off, to save energy perhaps? is my setup ok? thanks!

Not sure with the Civic's fan setup. But the aux fan is triggered by the compressor, while the rad fan is by the temp sending unit. Or both fans should turn on when the water temp is high. So I think its normal.

First thing you should do is to visit a legit aircon shop. Get the readings from the high side and low side. If you are experiencing high pressure, even when the aux fan is on, it may need replacement na. If not, then maybe your compressor is no longer efficient. When you rev the engine, does the aircon get colder?

[dr. d]

That's exactly my recent concern. Car is cool again when running, but no coolness when in idle mode (like AC is 50% off and FAN only). Do i need to replace parts, clean system etc? thank you very much tsikot experts

i had the same problem with my non-corolla/non-honda car. it seems, i had a leak and had no freon. the "cool" i experienced when running at speed, was simply the effect of compressed air expanding.. everything went back to normal when i had the leak remedied and the freon refilled.
and i agree.. the aux fan should turn on when the compressor is powered.
perhaps the prince is confusing over the aircon's aux fan and the car's radiator fan. perhaps someone tampered with the original wiring.

[Walter]

It's just the extreme hot weather. Even new cars won't cool as much when stuck in traffic compared to when in motion.

[theshepherd]

Mas mahal laminated evap.

Peace out!

[vvti2.0]

Sa amin na naka direct ang radiator fan sa makina, meron tinatawag na idle up controller, kapag nagbukas ka ng aircon automatic tataaas ang idling hangang mareach nya desired temperature sa thermostat mo, then mag off ang idle up mag-on ulit ito kapag bumamba ang temperature ng ilang degrees from your target thermostat temp.

So most of the time kung weak ang aircon during idle, may problema ang idle up mo.

[KrisVios04AT]

Im experiencing the same thing actually pero pag car is running mas malamig ang buga ng aircon but when idle hindi malamig , katamtaman lang but still nagbibigay lamig parin pero naka no. 8 na temp ng aircon ko nun so I dont know maybe because it needs cleaning na. My ride is vios 1.5g 2004 model automatic.


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[non-vtec]

Im experiencing the same thing actually pero pag car is running mas malamig ang buga ng aircon but when idle hindi malamig , katamtaman lang but still nagbibigay lamig parin pero naka no. 8 na temp ng aircon ko nun so I dont know maybe because it needs cleaning na. My ride is vios 1.5g 2004 model automatic.


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Check your aux fan if its functioning. It may be running but no longer as powerful as before. This will cause high pressure and will lead to premature wear on your compressor.

[Erick Chavez]

sakin naman iba, pag nasa 1 lang yung knob ng aircon super lamig sya, pero pag nilagay mo sa 2 lumalakas nga yug buga ng hangin pero nahihilaw yung lamig.. minsan parang fan na lang..

[ChoyJo]

Check your aux fan if its functioning. It may be running but no longer as powerful as before. This will cause high pressure and will lead to premature wear on your compressor.

Saan makakabili ng Magamdang Aux Fan? Feeling ko kasi ito problema ng Sasakyan ko(isuzu alterra).. Malamig ang AC kahit naka-idle pero kapag tumagal nga lang ng mga 30min na babad sa araw parang nahuhuli yung pag-andar ng compressor para lumamig.. Kasi kapag hinihila ko wiring nya bumibilis ang ikot ng fan.. Kapag binitawqn ko bumabagal.. May napagtanungan kasi ako yung motor lang ng Aux Fan( orig pang-nissan navarra (japan)-same naman daw ng para sa Alterra ang presyo 8.5k ).. NgaNga tuloy ako.. Inaasahan ko buong Aux Fan mga more or less 3.5k lang..

[wrcastro_ph]

Saan makakabili ng Magamdang Aux Fan? Feeling ko kasi ito problema ng Sasakyan ko(isuzu alterra).. Malamig ang AC kahit naka-idle pero kapag tumagal nga lang ng mga 30min na babad sa araw parang nahuhuli yung pag-andar ng compressor para lumamig.. Kasi kapag hinihila ko wiring nya bumibilis ang ikot ng fan.. Kapag binitawqn ko bumabagal.. May napagtanungan kasi ako yung motor lang ng Aux Fan( orig pang-nissan navarra (japan)-same naman daw ng para sa Alterra ang presyo 8.5k ).. NgaNga tuloy ako.. Inaasahan ko buong Aux Fan mga more or less 3.5k lang..

Depende sir sa klase ng Fan.. me mga China kase.. yun ang mas mura.

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Saan makakabili ng Magamdang Aux Fan? Feeling ko kasi ito problema ng Sasakyan ko(isuzu alterra).. Malamig ang AC kahit naka-idle pero kapag tumagal nga lang ng mga 30min na babad sa araw parang nahuhuli yung pag-andar ng compressor para lumamig.. Kasi kapag hinihila ko wiring nya bumibilis ang ikot ng fan.. Kapag binitawqn ko bumabagal.. May napagtanungan kasi ako yung motor lang ng Aux Fan( orig pang-nissan navarra (japan)-same naman daw ng para sa Alterra ang presyo 8.5k ).. NgaNga tuloy ako.. Inaasahan ko buong Aux Fan mga more or less 3.5k lang..

Depende sir sa klase ng Fan.. me mga China kase.. yun ang mas mura.

[macsd]

Kasi kapag hinihila ko wiring nya bumibilis ang ikot ng fan.. Kapag binitawqn ko bumabagal..

So it would be a wiring problem rather than fan problem.

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Kasi kapag hinihila ko wiring nya bumibilis ang ikot ng fan.. Kapag binitawqn ko bumabagal..

So it would be a wiring problem rather than fan problem.

[wrcastro_ph]

So it would be a wiring problem rather than fan problem.

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So it would be a wiring problem rather than fan problem.

Loose connection. malamang madumi ang terminal.

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So it would be a wiring problem rather than fan problem.

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So it would be a wiring problem rather than fan problem.

Loose connection. malamang madumi ang terminal.