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.