overheating unless interior fan is on

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Mar 7, 2009 | 09:22 AM

91 camaro rs

Thread Starter

Member

Joined: Oct 2006

Posts: 329

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From: Surprise,AZ

Car: 91 rs

Engine: 305tbi

Transmission: 700r4

Axle/Gears: 3.27 9bolt

overheating unless interior fan is on

unless i have the air or heat on the temp starts creepin up what can be causin this?

Mar 7, 2009 | 10:12 AM

vorticaldavid

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Joined: Mar 2008

Posts: 77

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From: Victoria, Tx

Car: 1992 Camaro RS Convertible

Engine: L03

Transmission: 700R4

Axle/Gears: LS1 posi/disk 3.42

Re: overheating unless interior fan is on

your fan switch could have gone out, i had that problem with my car

Mar 7, 2009 | 10:17 AM

8urv8

Member

Joined: Feb 2009

Posts: 123

Likes: 0

From: Cleveland,Ga.

Car: 1992 Camaro RS

Engine: 3.1L V6 w/.425" cam (Int. & Exh.)

Transmission: 700R4

Axle/Gears: Stock

Re: overheating unless interior fan is on

yeah, the fan is prolly not cutting on by itself. when you turn the air on it's turning the fan on too. when you turn it off, so does the fan. check the fan temp. switch.

Mar 7, 2009 | 12:35 PM

91 camaro rs

Thread Starter

Member

Joined: Oct 2006

Posts: 329

Likes: 0

From: Surprise,AZ

Car: 91 rs

Engine: 305tbi

Transmission: 700r4

Axle/Gears: 3.27 9bolt

Re: overheating unless interior fan is on

where is the fan switch located?

Mar 7, 2009 | 04:48 PM

UnderCover89TBI

Supreme Member

iTrader: (25)

Joined: Feb 2006

Posts: 7,260

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From: Manteca,California. Nor Cal.

Car: SOLD IT. Mopar guy only now.

Engine: gone

Transmission: gone

Axle/Gears: gone

Re: overheating unless interior fan is on

fan switch is located on the passenger cylinder head between the last 2 cylinders.

Apr 19, 2009 | 10:21 PM

91 camaro rs

Thread Starter

Member

Joined: Oct 2006

Posts: 329

Likes: 0

From: Surprise,AZ

Car: 91 rs

Engine: 305tbi

Transmission: 700r4

Axle/Gears: 3.27 9bolt

Re: overheating unless interior fan is on

how can i tell if it is bad short of letting it heat up to 240* to see if it turns on? i know ive seen switches claiming it turns the fans on at 180* do these work? any reccomendations, part numbers greatly appreciated

Apr 20, 2009 | 01:28 AM

Jason89RS

Member

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Joined: Jan 2005

Posts: 400

Likes: 1

From: Yucaipa, CA

Re: overheating unless interior fan is on

You can disconnect the connection from the switch and then short out the connection. If the fan comes on when you short the connection then the switch is bad. I'm running a 180* thermostat and a fan switch from an 87 Buick Grand National which goes on at 220 and off at 204. Napa part number ECHFS113.