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99 Accord overheating

Old 05-01-2007, 04:55 AM
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Join Date: Mar 2007
Posts: 10
Default 99 Accord overheating

For whatever reason my radiator fan is not coming on by itself. I tested it, works when i turn the AC on, both fans come on. I replaced the radiator fan switch thinking that was the problem. But didn't fix it. Thing heats up super quick since the fan wont come on. I checked coolant, plenty of it in the system. thermostat is fairly new. Anyone know what else could be keeping the fan from coming on?
Old 05-01-2007, 07:08 PM
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Join Date: Mar 2007
Posts: 10
Default RE: 99 Accord overheating

I've replaced the radiator fan switch, the fan works fine (it may have worked all along, i dont know) and i also replaced the thermostat. But the car is still over heating. Might it be the sending unit?
Old 05-02-2007, 11:22 AM
JimBlake's Avatar
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Join Date: May 2006
Location: Wisconsin
Posts: 17,516
Default RE: 99 Accord overheating

Could be the gauge sending unit or a short in that wire to the sender.

Explain the situation where it overheats; explain the behavior of the gauge. Gauge moves fast or slow? Gauge goes all the way up into red? Happens while driving? Happens when stopped & idling? etc...

The gauge sender is in the end of the head, it has a single wire. Unplug it. The gauge should drop to cold. If you can wiggle the wire & cause the gauge to rise at all, then you need to fix that.
Old 05-02-2007, 06:31 PM
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Join Date: Mar 2007
Posts: 10
Default RE: 99 Accord overheating

Yeah, i tested that with an ohm meeter. It appears to be working fine. I just decided to take it in...got to frustrated with this damn car. Hah, thanks for the suggestion
Old 05-02-2007, 06:58 PM
Senior Member
Join Date: Feb 2006
Location: Montana
Posts: 6,290
Default RE: 99 Accord overheating

Let us know what they find.... sounds like a temp sensor to me...
Old 05-02-2007, 08:42 PM
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Join Date: Aug 2004
Location: Canton/Massillon, Ohio 44646
Posts: 30,431
Default RE: 99 Accord overheating

Was it the coolant temperature sensor that was faulty?

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