Nikos

hello,
I have a 98 accord LX 5 speed, 4 cylinder... with 130K miles..

The fan doesn;t not kick in when the temp goes up... If I turn on the A/C, then both fans are working and the fans do stop and kick in when appropriate as long as the A/C button is pressed... I cannot figure it out..

I replaced the sensor that is by the thermostat, and I also replaced the thermostat. Sometimes, I feel that my waterpump is not working... but then it does circulate flow and I can feel the water going through the hoses... These days, temperature is around 20s here, so it is hard to figure out what is going on because the car runs cool...

Any ideas?

I am having real trouble looking at the online honda catalogue and figuring out is there is a switch I am missing...

Thanks in advance,

Nikos

Honda-Master

start car up and let engine get hot is the lower radiator hose almost as hot as upper hose??? if not t-stat is stuck,,,, if it is hot ,,t-stat is ok,,,,,,,,,,you need to jump the fan switch at t-stat housing 2 wires, connect them together while car is runnng , if fans come on replace switch,,

YeuEmMaiMai

either switch, relay, or temp sending unit is bad

Nikos

I cannot locate the switch ,can someone help?

http://www.hondapartssource.co...ch=no

I already replaced #15
Thanks in advance

Nikos

Nikos

OK, it is not the relay... I switched them around and same thing happens..

accordisslow

did you replace the ETC Switch ? we spoke about this many times and that could have been the problem here is a thread that will help you out.

https://honda-tech.com/zerothread?id=1457521


Also when you turn on the AC button do both fans kick on or just one? if just the AC fan kicks on then try puttin direct power into the radiator fan and you can do that by just getting two wires and running it from the fan motor to the batt and seee if it turns on if it doesnt you might have a bad fan motor.

Honda-Master

the switch is around t-stat housing ,, green lug 2 wires going to it ,,,,,,,,,,did you jump the 2 wires together??? if so did fans came on ?? make sure the car is running or key in on

accordisslow

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Honda-Master &raquo;</TD></TR><TR><TD CLASS="quote">the switch is around t-stat housing ,, green lug 2 wires going to it ,,,,,,,,,,did you jump the 2 wires together??? if so did fans came on ?? make sure the car is running or key in on </TD></TR></TABLE>

make sure to have the car running upto normal operation temp and wait for it to start heating up a little once it goes past the normal line and then check to make sure the fans kick on.

edcpus

we both have the same problem

edcpus

have you tried replacing the temperature sensor?

Nikos

yes, with A/C on, both fans work..

Yes, I replace part #15 on this pic



which is what you are talking about...

The relay is also working OK and the fuses are OK...

Since my car has 130K miles, I am going to be replacing the water pump, timing belt and the 4 seals very soon, and it might be the fact that the water pump is not working anymore and the water is not circulating enough to make the water under the sensor hot enough to switch the fans...

What really confuses me, is that with A/C on.. the fan will switch on and off.... depending on the temperature..

Can someone please tell me where the temp sending unit is in a 98 accord?

hondadude

Knock your self out reading this prior post..I'm not going thru this again
https://honda-tech.com/zerothread?id=1478603

Honda-Master

one last time////////// did you jump the 2 wires together???? the ones that go into # 15...,,,,,,,,,Let me say it ONE last time,, put the key on and jump those 2 wires together,,if fans will come on you got a bad switch ,,assuming that the thermostat opens properly,,

JimBlake

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Honda-Master &raquo;</TD></TR><TR><TD CLASS="quote">one last time////////// did you jump the 2 wires together???? the ones that go into # 15...,,,,,,,,,Let me say it ONE last time,, put the key on and jump those 2 wires together,,if fans will come on you got a bad switch ,,assuming that the thermostat opens properly,, </TD></TR></TABLE>Yeah, try that. Let us know...

The sending unit for the dashboard temperature gauge is #14. That shouldn't be related to the radiator fan circuit at all.

But has anyone thought that maybe it's working OK?? With the AC turned on, the fan will cycle along with the compressor clutch. That's NOT cycling with coolant temperature.

When the AC is turned off, the fans AREN'T SUPPOSED to run at normal operating temperature. They're only supposed to run when the temperature gets a bit too high. I don't know where Nikos is located, but maybe his climate isn't hot enough to make the fans run. I usually can't get the fans to run except in summer.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nikos &raquo;</TD></TR><TR><TD CLASS="quote">... These days, temperature is around 20s here, so it is hard to figure out what is going on because the car runs cool...</TD></TR></TABLE>

edcpus

hey have you figure out whats going on with your overheating problem? i still can't figure out what the problem is.

accordtype R

ur all idiots its the thermostat if the fan doesnt come on

Honda-Master

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by accordtype R &raquo;</TD></TR><TR><TD CLASS="quote">ur all idiots its the thermostat if the fan doesnt come on</TD></TR></TABLE>


wow ,, you call us idiots??? your mentality is like a CAVEMAN....what happens if t-stat opens and fan relay is no good ?? or fan switch is no good??

Before you call someone idiot know what the hell you are talking about ..yes it could be the t-stat ,if it is stuck closed ,but before replacing parts he needs to DIAGNOSE,,, ever heard of that ,,, your diagnostic is like a JACKASS ,, close minded

YeuEmMaiMai

If you have a 5th gen accord the t-belt was due at 90K (V6 excluded as it has no timing belt) for 1998-2002 cars it is 105K (all engines) if that belt snaps you are going to need some serious cash to fix that......

accordtype R

ok well replace it and tell me if im right

amckee

# 16 is the fan switch, not #15. Fan switches are on the upper hose and read the temp of the water AFTER it goes through the engine. The fan switch is always the LAST sensor before the water goes back to the radiator. #15 is the coolant temp sensor for ECU purposes. Jump #16 and see if that is your fan problem.

Honda-Master

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by amckee &raquo;</TD></TR><TR><TD CLASS="quote"># 16 is the fan switch, not #15. Fan switches are on the upper hose and read the temp of the water AFTER it goes through the engine. The fan switch is always the LAST sensor before the water goes back to the radiator. #15 is the coolant temp sensor for ECU purposes. Jump #16 and see if that is your fan problem.</TD></TR></TABLE>

yo Amckee i told you in a different thread and i will tell it to you again,,,,,,,# 16 is the switch that will make the fans come on after engine has been shut off and underhood temp is too high,,,,,,,,# 15 at t-stat housing is what makes fans come on while engine is running ...

hondadude

Here have a schemaitc to help you think along the electricals
http://members.troublecodes.ne...s.jpg

Nikos

thanks for all the help so far, I have not being able to work on the car... like I said with the A/C one, it doesn't overheat... I will find out what the problem is and update you guys...

Meanwhile, instead of working on my boring accord, I just installed a tsx motor in my 1992 EG

edcpus

hey try replacing that radiator fan switch, thats what happen to mine, i just figure it out yesterday. its ontop of the thermostat. I had purchase to bad ones.