I have noticed on my daughters 1993 Accord that the electric
cooling fan turns on about 30 seconds after shutting off the
eng. It will run for maybe 10 minutes.. This seems to happen
even on cold days... Any comments or advice on what
to test first would be appreciated.. I suspect the sensor may be involved.

Thanks,

Dan Black

 

its supposed to continue to run, to help cool off te engine. even if its cold outside, the motor still will get very hot if its run for a long time.

 

Interesting... I have been comparing the 1993 to my 1998 honda
accord and 1998 does not do the same thing..

Thanks,

Dan

 

Temp sensor for fan switch is flakey ?

 

The engine acts much like a "heat sink". IE: The mass of the engine stores heat (much like a battery/electricity) generated by combustion. In many spots in the engine, it's a LOT higher than the much quoted 182d operating temp. All this, of course, is controlled by a well engineered Cooling system.
Because of this "heat sink" effect, it is not uncommon for the coolant temp to rise once the engines' shut off because there is no coolant circulation to compensate from the engines block (and such) radiating off this stored heat. If the fans' didn't work, you'd be treated to watching the temp gauge rise; sometimes way into the red.
As a precaution I'd suggest checking into a possible coolant loss. I've noticed the fans working harder (run longer, with more frequency) as I've lost coolant (over a period of time).

P

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dblack &raquo;</TD></TR><TR><TD CLASS="quote">Interesting... I have been comparing the 1993 to my 1998 honda
accord and 1998 does not do the same thing...</TD></TR></TABLE>Your '98 isn't supposed to do that. Sometime around '95(??) Honda changed their control philosophy for the radiator fans. Newer ones don't run the fans after the key is turned off.

 

Thanks everyone! I'll check the fluid level and if it is OK, I'll
not worry about it..

I appreciate the input!


Dan

 

had a similar issue awhile back. turned out i had a crack in the radiator and was slowly leaking coolant. the temp gauge never really indicated that the motor was overheating so i assumed it was a electrical problem...

 

my fan comes on like 2 min after the cars been off, it usualy doesnt coem on tho its only done it 3 times so far

 

Jim:
Make a notation in the notes, '97's do it too. ( I suspect the 5th Gen's were the last ).
I am curious as to what the thinking was to do away with it for the '98's and later.
(I've just added the addendum to my notes as well

Cheers
P

 

My 92 accord did that for the entire 12 years I had it. I had to change the fan motor once. The car never overheated or leaked or anything. The manual said this was normal, so I figured it was normal.
The first time my wife drove the car to mother-in-law's I got a phone call. My wife says "I turned the car off, but it's still running!!!!!" I laughed for a while, then told her it was just the fan.

 

dont worry my 94 ex vtec does the same thing, its suppose to do that my mom told me. dont worry.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by P_Adams &raquo;</TD></TR><TR><TD CLASS="quote">Jim:
Make a notation in the notes, '97's do it too. ( I suspect the 5th Gen's were the last ).
I am curious as to what the thinking was to do away with it for the '98's and later.
(I've just added the addendum to my notes as well

Cheers
P</TD></TR></TABLE>They made the change earlier in other lines. My '95 Integra didn't run after shutoff, it had only one fan switch & no fan timer.

Maybe the reason was complexity & cost? If they decided to make sure it had sufficient cooling in natural circulation, then running a fan after shutdown didn't have to be necessary? But I'm guessing.

 

i have a 91 accord and after just getting a new radiator (old one was cracked) now the fan comes on even if i only drive the car for one minute!? it wasn't doing that before...should i be concerned?

 

Unplug the fan switch in the upper radiator hose nozzle (at the head). I think that's the one responsible for running AFTER shutdown. If that stops it, then replace that switch. It must be sticking closed.

If not, try the other fan switch (lower radiator hose/thermostat housing). Maybe I'm wrong about which one is which.

Otherwise, you'll have to do some checking to decide whether it's a wiring problem or a bad fan timer module.

 

Interesting addition, I own a Honda Pilot 2005 and the fan has been coming on after the ignition is turned off. So I think there was not anything changed like the one person thought it had.