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Radiator Fan Question


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Stormpainter
User

May 30, 2016, 10:34 AM

Post #1 of 15 (1057 views)
Radiator Fan Question Sign In

I just installed a Radiator Fan on a 2001 Mitsubishi Mirage, Everything went OK except I notice that the Fan only seems to run when the A/C switch is on! since this is the radiator fan, and not the A/C condenser fan is that normal? ...When I returned home today and it's a Hot day here in Florida, I turned off the A/C switch and off went the Radiator Fan also!


(This post was edited by Stormpainter on May 30, 2016, 10:39 AM)


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

May 30, 2016, 10:55 AM

Post #2 of 15 (1050 views)
Re: Radiator Fan Question Sign In

Does the condenser fan come on when you turn on the AC?





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on May 30, 2016, 11:08 AM)


Stormpainter
User

May 30, 2016, 11:00 AM

Post #3 of 15 (1047 views)
Re: Radiator Fan Question Sign In

No both fans were shot! I will have to replace that fan also! ...I Imagine the radiator fan is now working as the A/C Fan?


(This post was edited by Stormpainter on May 30, 2016, 11:02 AM)


Discretesignals
Ultimate Carjunky / Moderator
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May 30, 2016, 11:08 AM

Post #4 of 15 (1040 views)
Re: Radiator Fan Question Sign In

Yes, when the AC is turned on both the radiator and condenser fans should be running. When the vehicle gets up to a certain speed there is enough ram air to provide cooling and the PCM turns the fans off.

The radiator fan should also come on when the coolant temp gets between 203-221 degrees when you have the AC turned off.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


kev2
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May 30, 2016, 11:24 AM

Post #5 of 15 (1034 views)
Re: Radiator Fan Question Sign In

Sounds like system is not utilizing condenser fan -
did you take the time to scan for codes?
Check fan relays?


Stormpainter
User

May 30, 2016, 11:49 AM

Post #6 of 15 (1027 views)
Re: Radiator Fan Question Sign In

I checked most everything I could, then I stripped the fan wires slightly and connected them directly to the battery! and they were both burned out! I am proceeding slowly with replacing parts on this car, it has close to 300, thousand miles on it and any minute something major might go like the Transmission or even the engine! and I don't want to be left with a carcass full of new and expensive parts


kev2
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May 30, 2016, 12:00 PM

Post #7 of 15 (1024 views)
Re: Radiator Fan Question Sign In

that is the point of suggestions... DIAGNOISE before spending
did you check for codes?
did you check relays - and the connected fuses wiring etc...?


The PCM (computer) controls the fans and has a self diagnostic ability SO why not check it?
The PCM controls relays that energize fans SO why not check relays?
The relays have FUSES SO why not check fuses - esp the condenser circuit...


Discretesignals
Ultimate Carjunky / Moderator
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May 30, 2016, 12:07 PM

Post #8 of 15 (1020 views)
Re: Radiator Fan Question Sign In

He stated the radiator fan works now that it was replaced, so that eliminates the radiator fan circuit. He also stated the condenser fan motor is burnt out because he attempted to bypass it directly to battery and it didn't work.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


kev2
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May 30, 2016, 1:13 PM

Post #9 of 15 (1016 views)
Re: Radiator Fan Question Sign In

BIG picture thinking - and describing - DIAGNOISE before replacing.
I did not see this "condenser fan motor is burnt out because he attempted to bypass " ... wiring diagram and test light time


Stormpainter
User

May 31, 2016, 7:48 AM

Post #10 of 15 (992 views)
Re: Radiator Fan Question Sign In

Thanks to everyone for their Help! everything seems to be OK ...I guess now I just need to replace that other Fan!


Stormpainter
User

Jun 1, 2016, 9:45 AM

Post #11 of 15 (975 views)
Re: Radiator Fan Question Sign In

One last question, if the car is not getting Hot and holding normal temp. do I need to replace the A/C Condenser Fan?


Tom Greenleaf
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Jun 1, 2016, 11:04 AM

Post #12 of 15 (970 views)
Re: Radiator Fan Question Sign In

A bit confused with what's done and what's tested but you just said it was all fine? Does the condenser fan work now as it should? If so and no symptoms of a problem with it leave it alone. I really don't know of life expectancy of these vs what you get rebuilt or new.


If each fan is dedicated such that one is for radiator totally alone and condenser totally alone the design may still be when A/C is requested for both to run. Some fans will wait even with A/C for signal that it's needed which it would quickly sitting still running A/C that does blow cool air.


If it doesn't work at all and it's getting power and ground then A/C wouldn't work well for crap unless moving along or default to shutting down.


If you just feel better with a new motor and it's reasonable to do it now go for it,


T
(I'll go back and take out that empty post - nothing was there)



Stormpainter
User

Jun 2, 2016, 8:40 AM

Post #13 of 15 (952 views)
Re: Radiator Fan Question Sign In

Thanks Tom, The Situation is, I need to replace that Condenser fan which is also burned out! I was wondering, the car does not overheat with the one fan running so do I really need to replace the condenser fan right away? I do notice what you mentioned about the A/C not blowing cool when the car is not moving! I guess that's the purpose for that Fan! The A/C works a lot better when moving at about 30MPH


(This post was edited by Stormpainter on Jun 2, 2016, 8:41 AM)


Hammer Time
Ultimate Carjunky / Moderator
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Jun 2, 2016, 8:47 AM

Post #14 of 15 (946 views)
Re: Radiator Fan Question Sign In

Yes, you need to replace it if you don't want to destroy your whole AC system.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
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Jun 2, 2016, 8:57 AM

Post #15 of 15 (943 views)
Re: Radiator Fan Question Sign In

Yes - Sorry Stormpainter as I missed somewhere if posted that one didn't work. It really has to work and it would blow cool moving along on most but actually not all vehicle shapes are adequate so it's controlling airflow for condenser, mandatory for that and quite possible to harm it.


Done deal, understand now so replace it as Hammer just said I'm just agreeing it a must,


T







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