my 4th gen lude just started over heating i think around last week. and i have no ideal why or what went out to make them stop. i check the cooling fan relay i swaped it with my GF's honda accord relay and still didnt work. i check the fuses under the hood and still they dont come on. i haven't really messed with the wiren on them i just hooked up a slim fan but that has been months ago.

any info would help
thanks

p.s my motor is a H22a1

 

Well, your car shouldn't be overheating even if the fan isn't working. It's something other than your fan.

How old is your coolant and thermostat?

 

If your fans do not turn on at all, the engine would overheat when the vehicle is still and become normal when it started moving again. Since your fuses are ok, is your fan switch working?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vinuneuro &raquo;</TD></TR><TR><TD CLASS="quote">If your fans do not turn on at all, the engine would overheat when the vehicle is still and become normal when it started moving again. </TD></TR></TABLE>

No it won't. Never happened to my H23A1 or my H22A.

I'm telling you, his car is overheating because of another issue. Fixing the fan issue isn't a bad idea, but that is not causing his problem.

 

It's not a super common issue and I haven't experienced with Prelude's, but it has happend to me with a BMW when the fan clutch failed.

 

yup same thing happened with my WRX, as long as I was driving temps were fine, but if I was stopped long enough in traffic, temps would shoot up, due to no airflow over the Radiator. and this was with an otherwise perfectly functioning cooling system, just had bad fan relays. But with a prelude, I think the cooling system is so effiecent it houldnt be such an issue, even with a civic 1/2 rad (stock del sol, not aftermarket) my fan rarely kicks on, but at idle sitting the wrx turns on frequently.

But back on subject, is the thermostat opening on the car? is the cooling system full of fluid, is the fan switch working, all these need to be checked.

 

Try putting 12 volts directly to the fan to see if they run.

 

It's really a simple diagnosis for the op to find out if it is the fans.

1. Overheating only while 0mph= fan issue
2. Overheating at speed= something else

 

I'm experiencing the same thing right now, having a hard time figuring out what's up.

I have:

1. Replaced thermostat
2. Refilled coolant
3. Bled air from the system

When I'm at a standstill, the temp can shoot up. So far my fix has been to turn on the AC, which I believe forces at least one of the fans to turn on. Within 30-60 sec my temp comes back down. For whatever reason, the fans aren't turning on themselves like they should. I still have to check fan switch and relay.

In any case, turning on the AC isn't a bad deal right now since I live in TX and it's usually hot anyway. Might be something you could try in the meantime if you're needing to use the car regularly.

 

quick check for the fan switch (@ t-stat housing), unplug the 2pin connector and jump the 2 wires on the connector. When the key is at the "ON" position, it should force the fan to turn on as long as the jumper wire is in there.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AmauryR &raquo;</TD></TR><TR><TD CLASS="quote">quick check for the fan switch (@ t-stat housing), unplug the 2pin connector and jump the 2 wires on the connector. When the key is at the "ON" position, it should force the fan to turn on as long as the jumper wire is in there.</TD></TR></TABLE>

how do u jump the connector?

 

check this old thread out https://honda-tech.com/zerothread?id=2012417

 

yea it only over heats when i am stopped and nothing is blowing threw the rad.

i have checked the fans and they both work.
i will try to jump the connector in the morning if it doesn't come on then what does that mean?

 

its the relay if i remember correctly if you jump the connector and nothing happens

 

so have you ever put 12 volts to the fan to see if it even works?