1998 Honda Civic Overheat

Tiny
STEPHEN1529
  • MEMBER
  • 1998 HONDA CIVIC
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 140,000 MILES
Please help ! - When I am standing in traffic with the a/c on and even sometimes without no a/c the temperature meter creeps up toward the top. I have replaced all of the hoses, heater hoses. I have replaced the thermostat with a Honda brand one. I replaced the radiator. I also had the engine flushed by a shop that uses a special machine to cleanse the system and add new coolant. It sort of runs a bit better but I did notice that if I have the a/c on in standing traffic or going very slowly the temp. Starts to rise. The radiator fan works when the engine is hot. -- I don't know what else could be the problem. I see that the fill bottle is full after I have driven it for a while one hour or so. The car resumes back to normal temp. When I am going a good speed again. I need to know why this is happening.

I can only afford 10 dollars for now. - Please accept it and thank you for looking into this matter.
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Thursday, March 18th, 2010 AT 8:19 AM

6 Replies

Tiny
DOCFIXIT
  • EXPERT
Hi
There are two fans does condensor fan come on with A/C? So when at operating temp, A/C on both fans should operate.
Let me know
Thanks for donate
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Thursday, March 18th, 2010 AT 12:43 PM
Tiny
STEPHEN1529
  • MEMBER
The condenser fan does come on when the a/c clicks on - but the radiator fan does not.
Yesterday I tried to duplicate the overheat problem while parked, I just left it in park and watched the temp start to rise with the a/c on. Then I checked the radiator fan and it was not on -- it works I guess because sometimes I see it turn on - is it the fan sw? If so where is located. I don't know if the radiator fan and the condenser fan are supposed to come on together when the a/c is on.

BUT I did notice that even when the a/c is off it still overheats. - Sorry to mention that but I just discovered that yesterday. I swapped the relays in the box that turn the fan on and still same problem. The only thing I did not replace is the fan sw. Also there is another switch that looks like the fan sw. In the front of the engine. But that might be for something else.
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Friday, March 19th, 2010 AT 8:52 AM
Tiny
DOCFIXIT
  • EXPERT
Most likely faulty ECT this sensor tell computer to turn on fan at temp. See diagram


http://www.2carpros.com/forum/automotive_pictures/198357_Graphic_408.jpg

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Friday, March 19th, 2010 AT 2:21 PM
Tiny
STEPHEN1529
  • MEMBER
Actually it was the fan sensor. I had a garage replace it and now it is fine.
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Friday, March 19th, 2010 AT 11:11 PM
Tiny
STEPHEN1529
  • MEMBER
Thanks - the fix was replacing the switch closest to the thermostat.

So what is the other switch? The one in the diagram?

Are there 2 switches that I be aware of?
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Sunday, March 21st, 2010 AT 8:32 AM
Tiny
DOCFIXIT
  • EXPERT
That is ECT only one it is near thermostat
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Monday, March 22nd, 2010 AT 8:20 AM

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