inconsistent temperature Cars Philippines

first you've got to understand yung heat cycle ng refrigeration. yung naa-absorb na heat (cooling inside your car) kailangang mai-dispel sa labas (con.denser sa radiator) para ma balance yung cycle. most likely hindi mai-dispel yung heat absorbed due to the follwing reasons:

1. yung condenser mo blocked (this is located in front of your fresh water cooling radiator)

2. try mo if umaandar yung fan, there are two..  (remember you have to dispel the heat absorbed inside the car).

if not, have it serviced, it's either the carbon brush of the fan, or the relay that is wrong. some can repair or change the brush, if you're going to buy surplus the price ranges from 1500 give or take a few pesos.

3. or masyado mainit engine bay mo. there may be blockade sa cooling airflow to the engine.

hope this helps

 

I experienced this before on my Isuzu pick-up, it was the expansion valve, your car aircon's symptoms seems similar, you might want to have it checked. 

agree, probably the expansion valve kaya tumutukod....

expanskion valve pala yung ganun? pag nagyeyelo ano problem?

kelangan na dalhin yan sa car aircon shop. . .maaring expansion valve. . .or compressor

kung nagyeyelo ay kulang na sa linis ang evaporator coil. . .

I agree 100% to NapFlorendo's analysis above. I'm sure that by resolving the above problems - will solve the inconsistent cooling of the aircon in the car. Ang most probable suspect ko lang ay yung cooler fan ng a/c radiator: na maaaring umiikot nga at buo pa ang mga carbon brush pero mahina na at hindi na nakakapag-dissipate ng heat buhat sa radiator, kaya kailangang palitan na ito. Good luck and happy driving afterwards.

<first, saan nagyeyelo, right after the expansion valve ba, or sa evaporator?

if right after ang problema is kokonti ang refrigerant mo and you can check this sa iyong filter drier which is usually situated sa tabi ng iyong condenser sa may bandang radiator. there is a sight glass on top of the filter/drier and while running your a/c a" inside the nd if you alot of bubles or no liquid at all magpakarga ka, but have your system be checked by a competent technician baka may tagas.

if sa evaporator, blocked ang air flow kaya nagyeyelo.

one thing more to understand about the expansion valve, yung capillary tube with the sensing bulb, that is the one controlling the flow of refrigerant sa expansion valve, the "hotter" it is the more flow. the "liquid chemical" inside the bulb and capillary tube expands to counter act the spring load sa loob ng valve to open it more.

hope this helps again.>

I agreed again to NapFlorendo concerning the cause of ice formation in the a/c unit. Yes, it is the irony that the lack of refrigerant gas in the system is the cause of the icing (hindi iyan makukuha sa linis lang ng evaporator coils kahit na anong linis ang gawin mo dun hanggang sa halos mapudpod na sa kalinisan ang  mga cooling fins at pipings). I admire NapFlorendo because I found that we have common ideas; that whenever he makes comments or replies to other members' queries - he explains the causes/reasons of the issues before he relates the diagnosis and suggests solutions (hindi yung basta na lang babanat ng solusyon gayung hindi naiintindihan o ipaliwanag man lang kung ano yung root cause ng problema; hindi base lang sa kanyang kuru-kuro at pag-aakala at walang technical explations sa mga sinasabi). Kudos to you my friend.

second the motion sir, visit muna ung shop sir, baka kailangan lang ng overhaul, 2nd hand car mo binili, tapos you are using a year now, kailanganna talaga ng service..........

yup. . .para isang check at gawaan na lang. . .kasi baka may mga parts na due for replacement na rin. . .wala ka rin naman tools at equipment para mag-repair. . .basta humingi ka ng warranty. . .

this is common to front wheel drive cars where there is no direct fan running from the engine to cool down the radiator and condenser properly. kaya nga iba ang procedure sa paglalagay ng freon sa front wheel drive cars at sa rear wheel drive. pag nilalagyan ng freon nag front wheel drive car, dapat binabasa ng water ang condenser to get the exact pressure ng freon, and common mistake ng mga magagaling nating aircon technician is to just let it go until the freon is seems okay on their filling guage without wetting the condenser upon filling. while rear wheel, you just let the engine run with its huge fan of course while filling the freon.