High temp when Aircon/Fan is off on Civic'10

[Liana]

Good day po, Help po on what parts to be replaced or fixed. Pag naka-Off po aircon nataas po temp, pero pag naka-On nabalik sa normal gauge.. Civic'10 po.

[travajante]

Good day po, Help po on what parts to be replaced or fixed. Pag naka-Off po aircon nataas po temp, pero pag naka-On nabalik sa normal gauge.. Civic'10 po.

If yours is a dual-fanned system, check your coolant temp triggered 1. It may be gone. The AC cooling fan activates w/ the AC, hence your engine temp drops w/ AC on.
If it's a single multi-speed fan, some older ones are speed-control-resistor equipped...that part may be toast. AC triggers high speed which bypasses that resistor.
Other items to check...Coolant temp sensor & thermostat. Has the car ever overheated? If so, check your oil condition via the dipstick & the oil cap....mayo looking oil will require head gasket job. Let's pray against that.

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[Liana]

If yours is a dual-fanned system, check your coolant temp triggered 1. It may be gone. The AC cooling fan activates w/ the AC, hence your engine temp drops w/ AC on.
If it's a single multi-speed fan, some older ones are speed-control-resistor equipped...that part may be toast. AC triggers high speed which bypasses that resistor.
Other items to check...Coolant temp sensor & thermostat. Has the car ever overheated? If so, check your oil condition via the dipstick & the oil cap....mayo looking oil will require head gasket job. Let's pray against that.

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Sorry sir, di ko magets. Okay naman po ung coolant ko clear green pati ung sa takip ok naman. Yung oil clear din po. Pag naka off lang talaga ung AC dun lang nataas, balak ko sana palit radiator.. Dinala ko kasi sa casa, after dalhin saka naglabasan mga sira.. haays...

[travajante]

Sorry sir, di ko magets. Okay naman po ung coolant ko clear green pati ung sa takip ok naman. Yung oil clear din po. Pag naka off lang talaga ung AC dun lang nataas, balak ko sana palit radiator.. Dinala ko kasi sa casa, after dalhin saka naglabasan mga sira.. haays...

Check the fan/s 1st before digging further. 1 might be dead. Don't jump into replacing the radiator just yet.
Guesswork is good for mysteries....yours should be a simple huntdown.

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[Liana]

Check the fan/s 1st before digging further. 1 might be dead. Don't jump into replacing the radiator just yet.
Guesswork is good for mysteries....yours should be a simple huntdown.

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Thank you sir! Will do a check mamaya po.

[dr. d]

Good day po, Help po on what parts to be replaced or fixed. Pag naka-Off po aircon nataas po temp, pero pag naka-On nabalik sa normal gauge.. Civic'10 po.

i heard of this before.
the cooling aux fan would work, only because the aircon was turned on.
the "other switch" or other fan, if dual, was malfunctioning.
the radiator was fine, as i recall.

[travajante]

i heard of this before.
the cooling aux fan would work, only because the aircon was turned on.
the "other switch" or other fan, if dual, was malfunctioning.
the radiator was fine, as i recall.

There are 2 fan triggers. AC & Coolant temp sensor. The latter is 1 of the usual suspects.

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[oj88]

The Civic FD has two fans AND two fan speeds; Low and High. They both operate simultaneously.... so both are either OFF, Low Speed, or High Speed.... no in-between.

The Low speed is triggered whenever the engine coolant reaches operating temp.

The High speed is triggered whenever the A/C is switched on, regardless of coolant temp.

The High speed will also be triggered if the coolant temp is close to overheating, regardless of whether the A/C is on or off. In fact, to preserve itself, the ECU will disable the A/C when the engine becomes in danger of overheating.

That said, the first thing to check is if both fans are spinning normally as I've explained above. If one is spinning slower than the other or is not spinning at all, it will likely need replacement. These DC motors uses carbon brushes that wear out over time. If both fans are NOT spinning even if the coolant temp is well beyond normal operating temp, you will need to check the Low speed fuse.

This is just to give you an idea of how you can approach the problem and do the diagnosing by yourself. Of course, it is still recommended to have it looked at by a reputable technician.

[StockEngine]

Please dont crack your engine. Set that ac to max...

[travajante]

The Civic FD has two fans AND two fan speeds; Low and High. They both operate simultaneously.... so both are either OFF, Low Speed, or High Speed.... no in-between.

The Low speed is triggered whenever the engine coolant reaches operating temp.

The High speed is triggered whenever the A/C is switched on, regardless of coolant temp.

The High speed will also be triggered if the coolant temp is close to overheating, regardless of whether the A/C is on or off. In fact, to preserve itself, the ECU will disable the A/C when the engine becomes in danger of overheating.

That said, the first thing to check is if both fans are spinning normally as I've explained above. If one is spinning slower than the other or is not spinning at all, it will likely need replacement. These DC motors uses carbon brushes that wear out over time. If both fans are NOT spinning even if the coolant temp is well beyond normal operating temp, you will need to check the Low speed fuse.

This is just to give you an idea of how you can approach the problem and do the diagnosing by yourself. Of course, it is still recommended to have it looked at by a reputable technician.

Good FDspecific guidance![emoji106]

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[Liana]

The Civic FD has two fans AND two fan speeds; Low and High. They both operate simultaneously.... so both are either OFF, Low Speed, or High Speed.... no in-between.

The Low speed is triggered whenever the engine coolant reaches operating temp.

The High speed is triggered whenever the A/C is switched on, regardless of coolant temp.

The High speed will also be triggered if the coolant temp is close to overheating, regardless of whether the A/C is on or off. In fact, to preserve itself, the ECU will disable the A/C when the engine becomes in danger of overheating.

That said, the first thing to check is if both fans are spinning normally as I've explained above. If one is spinning slower than the other or is not spinning at all, it will likely need replacement. These DC motors uses carbon brushes that wear out over time. If both fans are NOT spinning even if the coolant temp is well beyond normal operating temp, you will need to check the Low speed fuse.

This is just to give you an idea of how you can approach the problem and do the diagnosing by yourself. Of course, it is still recommended to have it looked at by a reputable technician.

Thanks sa guide po. I checked and the other fan isn't spinning. After a drive with normal temp and checked the hood, pag naka-off po AC 2-fans are not working. Pag naka-on AC ung Fan lang sa kanan naikot and intermitent po ung naganang fan, iikot then hindi.. So, ano po kaya ang papalitan? Pag bumili po ba ako ng radiator, my kasama nang fan po ba yun? or iba pa? how much po kaya aabutin? Super thank you po pala, i'm learning..

EDIT:
May mga nabasa po ako na 1 fan lang daw talaga naikot when AC is on and iikot lang daw ung isa pag na attain na ung certain temp sa coolant? but after ko naman idrive ng matagal tagal then i turn the AC off, di parin naikot ung isa and for sure mainit na un.. haays need ko talaga dalhin sa auto shop but no to casa na muna...

[travajante]

Thanks sa guide po. I checked and the other fan isn't spinning. After a drive with normal temp and checked the hood, pag naka-off po AC 2-fans are not working. Pag naka-on AC ung Fan lang sa kanan naikot and intermitent po ung naganang fan, iikot then hindi.. So, ano po kaya ang papalitan? Pag bumili po ba ako ng radiator, my kasama nang fan po ba yun? or iba pa? how much po kaya aabutin? Super thank you po pala, i'm learning..

EDIT:
May mga nabasa po ako na 1 fan lang daw talaga naikot when AC is on and iikot lang daw ung isa pag na attain na ung certain temp sa coolant? but after ko naman idrive ng matagal tagal then i turn the AC off, di parin naikot ung isa and for sure mainit na un.. haays need ko talaga dalhin sa auto shop but no to casa na muna...

It's not the radiator. Check fan & coolant temp sensor health.

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[dr. d]

Thanks sa guide po. I checked and the other fan isn't spinning. After a drive with normal temp and checked the hood, pag naka-off po AC 2-fans are not working. Pag naka-on AC ung Fan lang sa kanan naikot and intermitent po ung naganang fan, iikot then hindi.. So, ano po kaya ang papalitan? Pag bumili po ba ako ng radiator, my kasama nang fan po ba yun? or iba pa? how much po kaya aabutin? Super thank you po pala, i'm learning..

EDIT:
May mga nabasa po ako na 1 fan lang daw talaga naikot when AC is on and iikot lang daw ung isa pag na attain na ung certain temp sa coolant? but after ko naman idrive ng matagal tagal then i turn the AC off, di parin naikot ung isa and for sure mainit na un.. haays need ko talaga dalhin sa auto shop but no to casa na muna...

like travs says, "it's not the radiator". buying one now may prove to be a waste of money.
it sounds like the fan or its actuator or switch or whatever makes it stop and go. it can also be the fan motor itself. it should be easy enough to find out, via a decent shop or mekaniko.

brand new radiators and fans are sold and purchased separately. look at the carousell pictures.
if ever an ad says radiator + fan, that's probably a surplus.

[shadow]

Yun replacement na circuit brand 1k+ lang, palitan mo na lang nun.


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[dr. d]

Yun replacement na circuit brand 1k+ lang, palitan mo na lang nun.


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many years ago,
my old 2003 lancer cedia's fan motor died. i balked at the 8K that they were asking for the oem.
we got the circuit brand for 990 bucks. we modified the mounting points in the spider (plastic!) for the circuit motor to fit right.
after a year, ok pa naman. we have since sold the car.

[shadow]

many years ago,
my old 2003 lancer cedia's fan motor died. i balked at the 8K that they were asking for the oem.
we got the circuit brand for 990 bucks. we modified the mounting points in the spider (plastic!) for the circuit motor to fit right.
after a year, ok pa naman. we have since sold the car.

In this case no need to modify anything. Plug and play


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[Liana]

Thank you po ulit. Ngayon ang problem na lang is ung natunog sa ilalim bandang harap everytime na dadaan sa humps, sabi ng casa Shock mounting daw, may nabasa naman ako stabilizer link, haaay buhay with old car (Though it's my dream car ).. After ko pa repair ung rack en pinion sa casa saka lang nagkaron ng ganung issue, squeeky sound sa humps... No to casa na muna talaga ko. Anyway, no more temp issue, thanks po ulit!

[oj88]

Yup, tyical na sa FD bumigay radiator fans, among others.

Unfortunately, typical din ang kalampag. To start with, stiff at harsh suspension ng FD kaya kawawa talga mga ball joints and bushings. Samahan mo pa ng vehicle age at bad road conditions.... perfect storm para mag labasan mga kalampag.

[shadow]

Thank you po ulit. Ngayon ang problem na lang is ung natunog sa ilalim bandang harap everytime na dadaan sa humps, sabi ng casa Shock mounting daw, may nabasa naman ako stabilizer link, haaay buhay with old car (Though it's my dream car ).. After ko pa repair ung rack en pinion sa casa saka lang nagkaron ng ganung issue, squeeky sound sa humps... No to casa na muna talaga ko. Anyway, no more temp issue, thanks po ulit!

Kung mounting mura rin lang yan if I remember correct JAG naman yata replacement niyan. While kung stab link mura din lsng yan tried and tested 555


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