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

[non-vtec]

I think its what they call compression loss. The revs have to be higher to give sufficient cooling. On a healthy compressor, its should easily cool down the cabin even at idle. You need to hook it up sa pressure gauge to confirm.

When you replace the compressor, kahit surplus is ok. as long as its quiet, and has good readings sa gauge. Replace the drier and expansion valve as well, have the evaporator cleaned then flush the system to get rid of debris.

[miked]

a cheaper way to eliminate or shoot the trouble (without doing something on the A/C system): tanggalin engine radiator at bugahan ng malakas na spray ng tubig ang A/C condenser (from the inside out para declog ang fins neto). tandaan wag masyado malapit para di naman masira ang fins. kahirap kaya suklayin sa dati netong hairstyle. kung malaki ang pagbabago, then probably e low heat transfer lang sa condenser due to dirt, grime, insect, etc. buildup....yung thermoswitches mo or sensors for the fans, etc. seems to be ok.

the air contains moisture at once nagcontact ito sa evap ng auto e nagcocondense ito. freezing point ng tubig is at 0 deg celsius kaya dapat di umabot sa ganitong temp yung evap kundi magaccumulate ang frost sa evap at mag-act na ito as insulator. lesser cooling na mangyayari.

the pressure reading sa low side ng A/C is at the neighborhood of 30 psi, magkalapit lang for R12 & R134 (with a corresponding saturation temp of just above zero deg celsius)

ang comfort air conditioning ay nasa 22-24 deg celsius usually.

yung thermometer ko sa sasakyan (nabili ko ng P88 sa Daiso, hehe) reads 30 deg celsius. pero i doubt its accuracy. tsaka kelangan ko na rin magpalit ng tints sa kabayo ko.

[miked]

after yung alternative trouble shooting na nabanggit ko e wala parin changes e best to go to a certified service center at magpressure check. actually, madaming klase ng pressure readings in diagnosing A/C problems pero yung common faults (& from experience also nung technician also) ang ginagawa.

hth

[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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[jjmd3_787]

Looks like an expansion valve problem. Try having it checked . . and the evaporator cleaned while they're at it.

[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.


Posted via Tsikot Mobile App

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..

[colt]

pinacheck ko yung auto. wala pa rin makitang problem. sinubukan pa namin ibilad sa araw na nakakabit nga pressure gauges. normal lahat ng reading. di siya ng hihi pressure pero pa hilaw ng pahilaw lamig. sinasabi ng mechaniko expansion valve daw pero kakapalit ko lang nun sabay sa paglinis nila last month e. sinubukan ko rin tutukan ngnelectric fan habang nka idle dub sa tapat ng condenser pero wala pa rin hirap na hirap siya lumamig.

[bakamaka2long]

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

sir baka compressor na sira nyan check mo kung umaandar ang fan

[wrcastro_ph]

It happened to my Civic EK and the aircon shop replaced the condenser fan.. its now very cool even on heavy traffic. I paid almost 5k for a brand new condenser fan.

[yapoy86]

a cheaper way to eliminate or shoot the trouble (without doing something on the A/C system): tanggalin engine radiator at bugahan ng malakas na spray ng tubig ang A/C condenser (from the inside out para declog ang fins neto). tandaan wag masyado malapit para di naman masira ang fins. kahirap kaya suklayin sa dati netong hairstyle. kung malaki ang pagbabago, then probably e low heat transfer lang sa condenser due to dirt, grime, insect, etc. buildup....yung thermoswitches mo or sensors for the fans, etc. seems to be ok.

the air contains moisture at once nagcontact ito sa evap ng auto e nagcocondense ito. freezing point ng tubig is at 0 deg celsius kaya dapat di umabot sa ganitong temp yung evap kundi magaccumulate ang frost sa evap at mag-act na ito as insulator. lesser cooling na mangyayari.

the pressure reading sa low side ng A/C is at the neighborhood of 30 psi, magkalapit lang for R12 & R134 (with a corresponding saturation temp of just above zero deg celsius)

ang comfort air conditioning ay nasa 22-24 deg celsius usually.

yung thermometer ko sa sasakyan (nabili ko ng P88 sa Daiso, hehe) reads 30 deg celsius. pero i doubt its accuracy. tsaka kelangan ko na rin magpalit ng tints sa kabayo ko.

Evaporator temp is around -5deg celsius or lower. It will freeze if condensate is trapped usually by dirt or not enough air can pass due to clogged cabin filter. air at vent should be at 10deg celsius or lower to have that 20 to 25 deg celsius real feel

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a cheaper way to eliminate or shoot the trouble (without doing something on the A/C system): tanggalin engine radiator at bugahan ng malakas na spray ng tubig ang A/C condenser (from the inside out para declog ang fins neto). tandaan wag masyado malapit para di naman masira ang fins. kahirap kaya suklayin sa dati netong hairstyle. kung malaki ang pagbabago, then probably e low heat transfer lang sa condenser due to dirt, grime, insect, etc. buildup....yung thermoswitches mo or sensors for the fans, etc. seems to be ok.

the air contains moisture at once nagcontact ito sa evap ng auto e nagcocondense ito. freezing point ng tubig is at 0 deg celsius kaya dapat di umabot sa ganitong temp yung evap kundi magaccumulate ang frost sa evap at mag-act na ito as insulator. lesser cooling na mangyayari.

the pressure reading sa low side ng A/C is at the neighborhood of 30 psi, magkalapit lang for R12 & R134 (with a corresponding saturation temp of just above zero deg celsius)

ang comfort air conditioning ay nasa 22-24 deg celsius usually.

yung thermometer ko sa sasakyan (nabili ko ng P88 sa Daiso, hehe) reads 30 deg celsius. pero i doubt its accuracy. tsaka kelangan ko na rin magpalit ng tints sa kabayo ko.

Evaporator temp is around -5deg celsius or lower. It will freeze if condensate is trapped usually by dirt or not enough air can pass due to clogged cabin filter. air at vent should be at 10deg celsius or lower to have that 20 to 25 deg celsius real feel

[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.

[ChoyJo]

Loose connection. malamang madumi ang terminal.
Loose connection. malamang madumi ang terminal.

Problem Solved na.. No problem sa Wiring.. Yung motor mismo ng Aux Fan ang Sira kaya pinapalitan ko na.. Ayun, back to normal na ulit even at real feel 41 degrees celcius na nakababad, tirik ang araw na naka-idle..��

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Loose connection. malamang madumi ang terminal.
Loose connection. malamang madumi ang terminal.

Problem Solved na.. No problem sa Wiring.. Yung motor mismo ng Aux Fan ang Sira kaya pinapalitan ko na.. Ayun, back to normal na ulit even at real feel 41 degrees celcius na nakababad, tirik ang araw na naka-idle..👍

[MysteryMillenia]

Same issue. Mitsubishi Strada L200 4x4 MT (1999).

Need ko ba palitan yung evaporator, condenser at upgrade yung blower? May nagsabi rin na pag OEM, hahayaan na lang but it seems older models’ air conditioners doesn’t work the same as modern models (for example, Innova 2016 and Hilux 2017 in my experience, kahit idle o nainitan, lumalamig parin).

[StockEngine]

Same issue. Mitsubishi Strada L200 4x4 MT (1999).

Need ko ba palitan yung evaporator, condenser at upgrade yung blower? May nagsabi rin na pag OEM, hahayaan na lang but it seems older models’ air conditioners doesn’t work the same as modern models (for example, Innova 2016 and Hilux 2017 in my experience, kahit idle o nainitan, lumalamig parin).

weak ac on idle?

thats an almost 20yo vehicle. of course it cant compare with a new vehicle.

dont start replacing parts without consulting some good ac shops..

[Yatta]

Check the fanbelt, baka kulang sa tension or palitin na.

[dr. d]

Same issue. Mitsubishi Strada L200 4x4 MT (1999).

Need ko ba palitan yung evaporator, condenser at upgrade yung blower? May nagsabi rin na pag OEM, hahayaan na lang but it seems older models’ air conditioners doesn’t work the same as modern models (for example, Innova 2016 and Hilux 2017 in my experience, kahit idle o nainitan, lumalamig parin).

bring it to the aircon shop, and have it seen by someone who knows the business. heh heh..
guessing at what should be replaced, can be an expensive, and sometimes, useless, proposition.
good luck, po.