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

**yapoy86** · May 20th, 2015 08:21 PM

Originally Posted by 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.

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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Originally Posted by 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.

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** · May 25th, 2015 03:11 AM

Originally Posted by non-vtec

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** · May 25th, 2015 10:12 AM

Originally Posted by ChoyJo

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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Originally Posted by ChoyJo

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** · May 25th, 2015 10:27 AM

Originally Posted by ChoyJo

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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Originally Posted by ChoyJo

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** · May 25th, 2015 03:50 PM

Originally Posted by macsd

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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Originally Posted by macsd

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** · June 5th, 2015 03:46 PM

Originally Posted by wrcastro_ph

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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Originally Posted by wrcastro_ph

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** · November 20th, 2019 02:26 AM

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** · November 20th, 2019 04:28 AM

Originally Posted by 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).

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** · November 20th, 2019 08:00 AM

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

**dr. d** · November 20th, 2019 09:02 AM

Originally Posted by 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).

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.