Radiator fan weak due to AC?

[KALAMPAG]

Just need your input guys what to do kc pag hindi on ang AC just above 1/4 mark ang temperature gauge ko... but if on ang AC napupunta siya and nag-iistay ng half mark pag nipatay ko ulit AC balik sa baba after ilang minutes. Is that normal? Is my radiator fan to weak or not having enough power due to the power drain ng AC? Kelangan ko ba improve and DIY ung negative wirings ko? TIA

[Innova_Boy]

what is your ride BTW, sa liteace ganyan din minsan over 1/2 and temp if ON ang A/C..

[KALAMPAG]

what is your ride BTW, sa liteace ganyan din minsan over 1/2 and temp if ON ang A/C..

Sir Innova - EK D16Y8 HONDA

So I guess that's normal huh?

[zeagle]

Kalampag please check if you have an aux fan for the aircon and see if it is working when your aircon is on. If it is working, something is wrong with your cooling system. Baka barado ang radiator or something.

[speedyfix]

honda temps are usually always at the half mark. haven't seen one at 1/4th yet.

[icon]

sobrang baba nga nung 1/4. 3/8 siguro basta under half pa yung normal sa akin.

check mo nga if both your fans are working. sa akin kasi ganito, with aircon off isa lang ang gagana na fan, yung nasa passenger side. with aircon naman both would come on.

hmmm, di kaya nakarekta yung mga fan mo and always on sya?

[afrasay]

Yaircon aux fan could be working, but is it turn at the right RPM? Baka mabagal na ang ikot.

[carlos]

both my corolla experienced overheat just recently. Yung 91 GL ko, replaced the radiator fan, nag short nasunog. Culprit? Yung relay di na pumapalo. Cost me 650 for the fan and 350 pesos for the relay. Medyo napamahal pa yata ako sa relay, dun ko pinagawa sa Dong-Ver electricals sa may F. Manalo San Juan

Just yesterday naman, nag overheat din Yung GLi 97 ko. Di na gumana yung thermostat so ayaw mag circulate tubig. Had it removed. Sayang nga kasi the water and coolant are still factory-filled.Never ko pa sya pinalitan or dinagdagan ng tubig except yesterday.

[speedyfix]

pinatangal mo lang? have it replaced or you will lose effectivity in your cooling system.

[theveed]

carlos, in addition to what miggs said, kung 97 oem pa yung coolant mo, long overdue na yan for flushing. 2 years lang usually ang regular coolant.

[carlos]

but the thing is everytime i check the water level, okay naman and clean. so i left it alone and did not bother to replace it. Now, with regards to the thermostat that i removed, i don't have intentions to replace it and leave at that without the thermostat. We are in the tropics anyway and its really warm here so i guess continous circulation of water is necessary. Baka kasi later on if i put on a new thermostat, yun na naman ang magiging cause of overheating. maiistuck lang. Thanks for the suggestion, i appreciate the concern.

[theveed]

Dude, simple lang yan, di lalagyan ng thermostat ang kotse ng manufacturer kung di kailangan.

The "tabi-tabi mechanic" myths of a thermostat being not necesary is counterproductive to your car.

If that theory is true (tropical country no need for thermostat) then why do well maintained cars have no problem with a thermostat even for decades on?

What you're doing is band-aiding the problem and not fixing it.

In the end, it's still up to you, but the reality is still this. All cars come with a thermostat, if it is indeed counterproductive (as you claim), then how come only old, mis-cared for vehicles experience overheating after 3-5-7 years down the road? If that theory is true, shouldn't the car experience overheating the moment it leaves the factory?

Lastly, the car doesn't require continous circulation of water, especially during cold starts in the morning. It takes 2-3x more fuel and time to properly warm up a car without a thermostat valve installed, creating more wear, more emmission and more fuel consumption every time you start a cooled down engine.

[speedyfix]

theveed, good explanation! katamad to explain. hehe!

[otomatic]

yup. mag o-overcool naman ang engine at high speed kung walang thermostat. Most thermostats naman remain at stuck-open position pag nasira.

[carlos]

yup. mag o-overcool naman ang engine at high speed kung walang thermostat. Most thermostats naman remain at stuck-open position pag nasira.

Mine did not happen that way, nakasara thermostat when my car overheated. Kaya nga di nag circulate yung water.

[Shadetree MKNX]

In my opinion, thermostats are only important because they allow the engine to attain proper operating temperatures quickly and maintain it the whole time it is running. Other than that, thermostats aren't needed at all.

I've read someone's post before saying that putting a thermostat slows down the flow of the water between the engine and the radiator, and that this helps to provide more time for the engine to "dump" more heat into the water as it passes by on its way to the rad. Likewise, he says, it also allows more time for the heated water to release the heat on to the cooling fins as it passes through the radiator.

I also believed that theory before but now I'm rethinking it a bit. I think the heat transfer has no relevance to the speed of the water circulation because although it is true that less heat gets transferred to the fast flowing water, it the rapid flow also brings the same water around faster thus causing it to pass by the engine more times than before.

In other words, it's a tradeoff. You lose one you gain another, so it evens out.

But then again, I wouldnt let my engine go without a thermostat for long for the same reasons I stated earlier.

[speedyfix]

In my opinion, thermostats are only important because they allow the engine to attain proper operating temperatures quickly and maintain it the whole time it is running.

i think that is a good enough reason to have them.

more that letting the water stay in the engine longer (thereby letting it take more heat from the engine), the thermostat lets the cooling liquid stay longer in the radiator letting it cool down more before having to go back around the engine (so that it is cooler when it eventually has to go back around).

[Shadetree MKNX]

In my opinion, thermostats are only important because they allow the engine to attain proper operating temperatures quickly and maintain it the whole time it is running.

i think that is a good enough reason to have them.

more than letting the water stay in the engine longer (thereby letting it take more heat from the engine), the thermostat lets the cooling liquid stay longer in the radiator letting it cool down more before having to go back around the engine (so that it is cooler when it eventually has to go back around).

Yup.

[carlos]

There's an auxiliary that does the job to cool the water in the radiator. A sensor triggers the fan at a certain temperature.