Cooling Fan Problem in 97, 4-cylinder Camry

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Old 09 May 2006, 07:10 pm   #1 (permalink)
jay
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Default Cooling Fan Problem in 97, 4-cylinder Camry

Normally the temp guage needle doesn't get above the mid point, but
lately it has risen above it and I have had to turn on the heater to
bring it back down. I didn't find a blown fuse under to hood or near
the steering wheel. I reseated most of the relays. But nothing changed.
If I disconnect the cable to the temp switch near the bottom of the
radiator, the fans come on with just the ignition turned on. If I
disconnect the same cable near the battery, the fans comes on. And I
verified with a meter that this section of the cable does not have a
short, so it seems the circuit in the temp switch is closed and remains
closed even when it gets too hot. Is there anything else I can check
and should replacing that temp switch at the bottom of the radiator fix
the problem? TIA.

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Old 10 May 2006, 12:56 am   #2 (permalink)
jg
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Default Re: Cooling Fan Problem in 97, 4-cylinder Camry


"jay" <jaym1212@hotmail.com> wrote in message
news:1147219837.113201.3950@j33g2000cwa.googlegrou ps.com...
> Normally the temp guage needle doesn't get above the mid point, but
> lately it has risen above it and I have had to turn on the heater to
> bring it back down. I didn't find a blown fuse under to hood or near
> the steering wheel. I reseated most of the relays. But nothing changed.
> If I disconnect the cable to the temp switch near the bottom of the
> radiator, the fans come on with just the ignition turned on. If I
> disconnect the same cable near the battery, the fans comes on. And I
> verified with a meter that this section of the cable does not have a
> short, so it seems the circuit in the temp switch is closed and remains
> closed even when it gets too hot. Is there anything else I can check
> and should replacing that temp switch at the bottom of the radiator fix
> the problem? TIA.
>

Does the fan actually run when engine temp is high enough? (watch it for a
while, see if it ever starts) The temp sensor is far the most likely cause
of fan not running.


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Old 10 May 2006, 10:37 am   #3 (permalink)
jay
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Default Re: Cooling Fan Problem in 97, 4-cylinder Camry

> Does the fan actually run when engine temp is high enough? (watch it for a
> while, see if it ever starts) The temp sensor is far the most likely cause
> of fan not running.


If I let the car idle for a while on a hot day (+90F), needle on the
temp guage reaches hot but the fans don't come on. When you say "temp
sensor", are you referring to the sensor at the bottom of the radiator
or the one that drive the temp guage?

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Old 10 May 2006, 04:56 pm   #4 (permalink)
jg
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Default Re: Cooling Fan Problem in 97, 4-cylinder Camry


"jay" <jaym1212@hotmail.com> wrote in message
news:1147275463.554336.184600@j33g2000cwa.googlegr oups.com...
> > Does the fan actually run when engine temp is high enough? (watch it for

a
> > while, see if it ever starts) The temp sensor is far the most likely

cause
> > of fan not running.

>
> If I let the car idle for a while on a hot day (+90F), needle on the
> temp guage reaches hot but the fans don't come on. When you say "temp
> sensor", are you referring to the sensor at the bottom of the radiator
> or the one that drive the temp guage?
>

I don't know where it is on these cars, but the one which closes the circuit
for the fan to run. That's usually the culprit with electric fans, the only
complication is the aircon which makes all the fans run. Might be worth
checking if that happens... if there is aircon.


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Old 10 May 2006, 06:30 pm   #5 (permalink)
m Ransley
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Default Re: Cooling Fan Problem in 97, 4-cylinder Camry

Till you figure out what to replace can you turn on the Ac, both fans
are supposed to run when the Ac is on, at least for now you wont do
damage to the motor from overheating

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