A/C: Is it my fan, my compressor, or what?

[astorath]

My car A/C is driving me crazy these past few days. 'Eto yung nangyayari:

From cold start, I switch on the aircon (both fan and thermo control). May hangin na lumalabas pero hindi lumalamig.

Usually, when I do this, there is a humming sound coming from under the hood. Ngayon wala. When I popped the hood and checked. I noticed na hindi tumatakbo yung aux fan ng aircon ko. From my experience, kapag on yung aircon ko at idle, the aircon aux fan runs. Ngayon hindi.

I checked the belts din pero umiikot naman silang lahat, especially yung nakakabit sa compressor.

Not until I've driven the car for quite some time at uminit na yung makina tsaka lang babalik yung humming sound at lumalamig na yung hangin from my vents.

Someone advised me that it's the freon mahina na daw yung pressure, kaya kapag sometime after the pressure has built up dahil sa pag-andar ng makina at compressor, tsaka pa lang lalamig yun and magki-kick in yun fan dahil pressure switch daw ito kaya sabay mag-on sa aircon kapag normal at walang problema. Tama po ba ito?

Could you please advise me on the matter. I'd appreciate it.

My car's a 93 Corolla GLi. If you have ideas on what I have to get fixed baka pwede pa-advise na din kung magkano ang gagastusin. Medyo kapos kasi ako sa oras na pumunta sa mekaniko. Sana kapag pumunta ako, ready ko na din yung money para hindi sayang sa oras.

Salamat!

[nicolodeon]

Hmm...baka yung compressor mo. Pa-check mo na lang at baka palitin na or for overhaul. Kung for over-haul, advise ko bumili ka ng lang ng surplus or bago. Not worth it na ipa-overhaul ang compressor.

As for your aux fan, I believe hindi dahil sa pressure ang dahilan. Normally, kapag binuksan mo A/C mo eh dapat aandar na yung mga fans, regardless of whatever pressure your compressor is pumping out or dun sa pressure switch. You might have an electrical problem sa A/C system mo.

But then again, I'm no aircon expert. Fellow tsikoteers, say nyo?

[zman]

AFAIk, kung from cold start talagang hindi iikot yun mga fan till they reach a certain temp.

[astorath]

Dati kasi pag-on nung aircon, aandar din yung fan ng aircon.

Actually, umaandar yung fan after a while pro not from turning on the aircon from a cold start.

Lumalamig din yung aircon that is after I've driven for sometime already.

By the way, may bubbles na yung sight glass ng dryer ko.

Pero this one autoshop recommends replacing the dryer, together with the cleaning and all.

Sabi namang ng isang friend ko, freon charging lang daw yun.

I'm still looking for other opinions, for those who've given theirs, thanks a lot.

[chris_d]

Usually kung may bubbles na yung sight glass low na yung freon. Dapat clear yung makikita mo sa glass when the aircon is on.

Regarding the aux fan, baka naman dahil tagulan at medyo malamig nde sya nag-o-on kaagad.

[chris_d]

Oh, and since you mentioned na lumalamig pa rin ok pa cguro compressor nyan. Nasiraan na ako ng compressor dati, nagleak, wala talagang lamig, just air from the blower.

[astorath]

Yeah. Lumalamig pa din.

No noticebale leaks from the pipes pero kung may bubbles na yung sight glass, low na yung freon ko?

May leak kaya yung A/C ko, or talagang mababa na lang talaga sa freon?

[theveed]

Try this, pag start mo ng car and aircon, buhusan mo or hose mo yung condenser mo (yung nasa harap ng radiator) kung lumamig, aux fan yan.

check mo din yung viewing glass ng drier (yung parang bote), you should see some fluid flowing without bubbles. Kung mabula, may leak ka, pahanap mo yung leak and refill freon and compressor oil.

[Mojo]

looks like a job for Mang Mario hehhehhee,

free estimate sa kanya, at sigurado lowest price in town bibigay sayo, pag minor lang libre hehehe

[astorath]

Lo and behold. Down the street sa opisina namin ay isang auto-repair and aircon shop. Dropped by during lunch.

Had it check, wiring lang pala ang major problem. Madumi yung socket ng wire na nasa may bandang check-valve. Kaya naman lumalamig after a while is because the fans just kick in after the temp goes high.

Otherwise, yung dapat na pag-on ng fans kapag turn-on ng aircon, hindi gumagana kasi madumi yung socket.

The freon is just a bit low pero wala namang leaks na nakikita. The pressure in the hoses is constant.

Had the freon re-charged nga lang for assurance. Yun lang. Seems ok na ulit.

That is sana. I hope I didn't get ripped off. Or kailanganin pa ng mas malaking repairs.

[duncan_sheek]

bro, thats exactly my current problem... this weekend lang nagloko aircon ko. when i start the engine & aircon, minsan wala akong naririnig na click na nag-indicate na on na ang a/c, parang fan lang & after some time while driving, gradually lumalamig na but not as cool as before... what should i tell the repair guys pag nagpunta ako sa shop? thanks.

Lo and behold. Down the street sa opisina namin ay isang auto-repair and aircon shop. Dropped by during lunch.

Had it check, wiring lang pala ang major problem. Madumi yung socket ng wire na nasa may bandang check-valve. Kaya naman lumalamig after a while is because the fans just kick in after the temp goes high.

Otherwise, yung dapat na pag-on ng fans kapag turn-on ng aircon, hindi gumagana kasi madumi yung socket.

The freon is just a bit low pero wala namang leaks na nakikita. The pressure in the hoses is constant.

Had the freon re-charged nga lang for assurance. Yun lang. Seems ok na ulit.

That is sana. I hope I didn't get ripped off. Or kailanganin pa ng mas malaking repairs.

[theveed]

pag ganun chinecheck usually fuse at mga wires going to the compressor. Paminsan naman yung thermostat switch ang sira.

[joey]

[I]humming sound sa hood? bka ur compressor needs replacement na worn bearing n un mlamang at kung erratic ung paglamig worn clutch plate na kya minsan nka engage or vise versa. check m rin thermostat ng aircon ang gli prone sa pagloloko pag luma na. dont try to overhaul the cmpressor magttpon k lng, buy new or surplus na my warranty pra safe ka. check also kung tama idling loko2 ung mga ngdsign ng mdel n yn evrytme nag drop ng blow 6- 700rpm ng sshotoff ang cmpressor pra daw dka mmtayan, ang tnong e bkit m nman ibaba? mgttipid k gas? hehe

[duncan_sheek]

2 weeks ago lang ako nagpalinis ng aircon, replace filter/dryer & check valve... but when i brought my car to the shop in boni for a tune up, dun na nagsimulang magloko aircon. i dont know kung yun ang cause, during tune-up nilipat ng mekaniko ang hose from the carburetor sa isang vacant tube na nasa carburetor din bec di na daw gumagana ang tube na yun and tumaas ang idling. before the tune up ok naman ang aircon or talagang timing lang na nagloko ang aircon ko regardless kung ginalaw ang carburetor ko o hindi... by the way, my ride is ae92 1.6. and my problem is similar to astorath. Thanks guys.

[hyperthread]

from my experience and from what I know from the threads usually pag nagpalinis doon nasisira..

Kaya wag na lang palinis hanggat masira na lang. Yung honda hatch ko before never ko pinalinis (4 years).. binenta ko maayos pa.

[t2erns]

yung bubbles sa sight glass is not applicable diagnosis sa r134-a system, para sa r12 system lang yung diagnosis na pag me bubbles ay low charge kaya yung mga 134a system karamihan ng receiver drier ay wala ng sight glass. for info lang ho.

[peeves]

pasakay naman sa thread.

problem ng aircon ko is, bigla na lang nawawala yung lamig (blower na lang). specially if maiinit sa labas. then after a while babalik din yung lamig.

pag hindi naman maiinit, like early morning and at night, ok naman yung lamig nya.

ano po kaya problem ng AC ko?

[t2erns]

pasakay naman sa thread.

problem ng aircon ko is, bigla na lang nawawala yung lamig (blower na lang). specially if maiinit sa labas. then after a while babalik din yung lamig.

pag hindi naman maiinit, like early morning and at night, ok naman yung lamig nya.

ano po kaya problem ng AC ko?

over or undercharge ng refrigerant will cause the same problem, pa check mo muna yung charge kung tama.

[peeves]

that's the freon charge right?
sige will have it checked tom. thanks!

[raine]

pasakay naman sa thread.

problem ng aircon ko is, bigla na lang nawawala yung lamig (blower na lang). specially if maiinit sa labas. then after a while babalik din yung lamig.

pag hindi naman maiinit, like early morning and at night, ok naman yung lamig nya.

ano po kaya problem ng AC ko?

on mo ang aircon then check yung fan kung gumagana, minsan kasi hindi gumagana or intermittent ang operation nito kaya intermittent din ang lamig ng aircon, dapat every time magon ang aircon(engage ang compresor) andar din ang aux fan ng aircon at pagmalamig na compressor will disengage ang auxfan mamamatay din, pag hindi gumagana ang fan check connection or replacement na ng aux fan, ganito ang nagyari sa akin palit nalang ako ng bagong aux fan kila mang mario 2500pesos ang bill ko.