vas25tl

My 96 2.5TL's cooling fan has been operating a little more lately. Usually, it'll stay on after I shut off the car after long drives. Lately it does it after most trips, even short ones. Is this normal? The car never overheats, I have coolant in the radiator, everything seems normal. Sometimes it's on for quite a few minutes after getting out of the car.

TLin401

I wouldn't worry about it if everything seems normal to you.

vas25tl

^it's just strange that it's on for so long so often. It seems like it's running under stress....

TLin401

Since I had my radiator replaced, mine doesn't even come on anymore.

vas25tl

^I have a small hairline crack in the top of my radiator...It's been that way for a while, steams sometimes when moist outside but doesn't really bother the functionality.

meazz1

How do you know it does not bother the functionality? It's a pressurized system and if there is a crack, it's loosing pressure hence the fan stays on longer.

vas25tl

I don't know but the car has never actually overheated. You do have a point, it might be the reason for the fan working overtime.

Go90go

Check the sensors to make sure they're plugged in!

~Cheers~

DAiNiUS

You can also check the fuse.

vas25tl

Well the car was pretty low on coolant. For some reason it's not pulling out of the reservoir tank and I needed to put about a half gallon of coolant into the radiator; that explains why the fan was on.

I do have a small leak somewhere, I need to pressure test it. Also, I feel as if it slightly evaporates on top where the plastic meets the metal. I feel like it seeps out just a little there, I see some steam coming out from there time to time.

Anyone have issues with this?

MarcDavidoff

That is pretty common with the Honda radiators (plastic/metal). I would replace that radiator. Like mentioned above, if it has a crack, you will not be pressurized correctly and will get air in the system, and it won't pull from the overflow tank properly either. And you risk overheating which you definitely do not want to do

TexasHonda

The engine-off, cooling fan action is initiated by Thermoswitch B closing (Temp> 195F? not sure). It could be that Thermoswitch B is going bad, or somehow housing temp is actually reaching that value. Loss of coolant (air in housing) could cause heat soak from the engine to drive thermoswitch B closed, even when coolant temp was < set point. As was suggested, a new radiator may be necessary.

Thermoswitch B is on the upper radiator fitting at the engine side. If you have an IR temp sensor, you can shoot the housing to see if temp exceeds specification. If temp is cooler than spec, I would replace thermoswitch B.

good luck