Aircon problem: Nawawala ang lamig at speeds over 80kph!

[artwalk]

Guys, tulong naman please. I need to understand what's going on with my aircon system. For about 6 months na, and about 3 repairs, di pa rin nakukuha yung problema.

Lumalamig naman sya pero pero pag nababad na ako at speeds over 80kph, nawawala ang lamig at fan na lang ang gumagana. When I first found out about this, I thought minamaligno ako sa Skyway. Kasi dun lang talaga ako bumibilis. Upon realizing the correlation between high speed and the cooling loss, I had it looked over dito sa Cavite. Most of the aircon shops suggested na yung valve daw ang problema. So eventually, I had it replaced. Hindi na na test drive nun kasi hirap magpabilis ng takbo sa Aguinaldo Highway. So when I got the chance, sa South Super ko tinakbo. Ganun pa rin.

Any ideas kung bakit nangyayari 'to? I'm not much of a car guy. Any info is very much appreciated. Salamat!

[alwayz_yummy]

baka mahina na compressor mo, have your condenser blasted with high preesure water...and dalhin mo kay mang mario...search mo nalang sa workshop, may thread dun about mang mario...

[OTEP]

Parang nagyeyelo system mo. Try turning down the thermostat when hitting those speeds to see if you will still lose a/c cooling.

When the system freezes, nawawalan ng lamig.

[artwalk]

*otep and alwayz_yummy, thanks for your inputs. at least may idea na ako ngayon.

anyone here from Cavite? especially around the imus and dasmarinas? was wondering kung meron kayong ma-isa-suggest na reliable and cheap aircon shop within these areas.

[artwalk]

*otep and alwayz_yummy, thanks for your inputs. at least may idea na ako ngayon.

anyone here from Cavite? especially around imus and dasmarinas? was wondering kung meron kayong ma-isa-suggest na reliable and cheap aircon shop within these areas.

[artwalk]

Parang nagyeyelo system mo. Try turning down the thermostat when hitting those speeds to see if you will still lose a/c cooling.

When the system freezes, nawawalan ng lamig.

Ano usually cause sa pagyeyelo?

[OTEP]

Can be due to thermostat set too cold (especially for older vehicles)

[jagxtrm]

o baka naman hindi naka dikit yng maliit na pipe from the expansion valve dun sa pipe ng aircon, and that causes pagyeyelo during high RPM.

pwede rin may problema ang expansion valve, or marami ng na-accumulate na dumi sa receiver/drier.

suggestion ko PM mo si zeagle ...

[JohnM]

Pwede rin kaya overcharged? In my case kasi tama na ang charge na nilagay. Nung hinataw ko sa C5 biglang umingay at nawalan ng lamig. Binalik namin sa shop at sabi nag-overcharge daw at high revs. Binawasan na lang nila.