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92 Accord overheats when AC turned off. Honda

The car is overheating (needle points to red line) idling in traffic. When I turn on the AC, the temp is fine. When I turn ignition off the condenser fan kicks in. I then drive home and remove the bleed hole and find no trapped air (temp dial is set to HOT.) I then remove the (92-96 C) fan switch. I jump the switch terminals with ignition on. The fan runs. I pot boil the switch connected to an ohmmeter. Right before the water begins to boil, the switch closes. I reinstall the switch, refill, bleed and allow the fan to come on twice, as instructed by the service manual. The car does not over heat anymore, confusing. What could cause this random overheating?

Thanks

Reply to
Sam Nickaby
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Possibly some corrosion on the connectors you dislodged. Good diagnostic procedure !

Keep an eye on the reservoir level.

'Curly'

Reply to
motsco_ _

Sounds like your cooling fans are not coming on at the proper time in non-A/C mode intermittently. Remember, when you turn on the A/C... the cooling fan(s) come on whenever the compressor is engaged. Maybe the switch you boiled is intermittent. I would change that first.

Professor www.telstar-electr> The car is overheating (needle points to red line) idling in traffic. When I turn on

Reply to
Professor

I have never worked on a Honda. That being said, most other cars use more than one temp sending unit. One for gauge, one for a/c, one for each fan, one for each head, etc. Perhaps the sending unit for the fan is bad. OR, the fan motor is bad and sometimes does not run. Take the fan motor apart and look at the brushes.

Reply to
« Paul »

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