Confusing Radiator Fan Operation

[Dylan Shrout]

Me and my brother spent all morning trying to figure out why the radiator fans aren’t working properly on a 1995 Acura Integra. Today, we jumped the ECT connector and the fans turned on. The fuses and relays are fine. We came to the conclusion that we would just replace the ECT switch and it would be fine. After the replacement, we drove the car and it overheated. We also had it just idle and it overheated. The fan does not turn on with the A/C for some reason. They did kick on by themselves once when idling. We could not get them to turn on after that though. Also, there is no heat blowing in the cabin. It is really a head scratcher.

Topic

[cb7ftw]

Sounds like you have an air pocket in your coolant.

You can test your switch like this:
http://www.youtube.com/watch?v=Lcx_TlOKkFU

[Ingvar]

Here ya go

http://www.tegger.com/hondafaq/overheating/index.html#nofan

[Ingvar]

http://www.tegger.com/hondafaq/overheating/overheating-index/index.htm

[Dylan Shrout]

We have suspicion that it is the thermostat. I replaced it recently, but it is an aftermarket one. We took out the thermo and the fans turned on. Maybe we have to get one from Honda.

[Lorrin Barth]

Yeah, some Honda’s use a dual action thermostat that plugs and unplugs two openings as it operates. If the aftermarket thermostat doesn’t follow this design you will have a problem.

[Author]

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