Troubleshooting 76 Spider blower fan - Alfa Romeo Bulletin Board & Forums
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post #1 of 8 (permalink) Old 07-28-2017, 06:33 PM Thread Starter
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Troubleshooting 76 Spider blower fan

Blower fan hasn't worked since I got the car. I found several good threads on this forum and am working through them. One question if you please, regarding the fan switch and the "heating" light in the speedo.

With my fan switch in the top position the light is off. With the switch in the middle position the light comes on. With the switch in the bottom position the light goes off again.

What does this mean?
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post #2 of 8 (permalink) Old 07-28-2017, 07:25 PM
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First off ..does the fan blade turn?

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post #3 of 8 (permalink) Old 07-28-2017, 07:38 PM Thread Starter
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Quote:
Originally Posted by ARwrench View Post
First off ..does the fan blade turn?
I can't figure out where to stick my finger/screwdriver to check. I feel all around but there isn't anything there like a fan blade. Just solid plastic.

These are the holes I am probing. Any suggestions?
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post #4 of 8 (permalink) Old 07-28-2017, 07:41 PM
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Take those 8mm? bolts off the duct to gain access to the blade
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post #5 of 8 (permalink) Old 07-28-2017, 09:14 PM
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Quote:
Originally Posted by Canadian Spider View Post
I can't figure out where to stick my finger/screwdriver to check.
You don't need to stick your fingers anywhere; if the fan is turning, you will hear it. If it's silent, the the answer to ARwrench's question is "no".

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Originally Posted by Canadian Spider
With my fan switch in the top position the light is off. With the switch in the middle position the light comes on. With the switch in the bottom position the light goes off again.
Well, that's a little weird. The light just indicates voltage to the motor. The middle position is "high", so the light is typically bright (which you confirm). The bottom position puts the blower motor on low speed; typically the light will be on, but glowing dimly in that position (which you report as "off"). Can you see the light at night with the switch on "low"?

Jay Mackro
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'65 Guilia Sprint GT
'67 Duetto
'91 164L

Last edited by Alfajay; 07-28-2017 at 09:20 PM.
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post #6 of 8 (permalink) Old 07-28-2017, 10:14 PM
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Put the air distributing lever about half way. Then stick your finger in the bottom of the slot you pictured and it will go in between the case and the flap you see pictured. You should then feel the fan blade. Push it with your finger. If it will spin then the is probably bad. If its stuck then see if you can free it by turning it.

You can search the BB for different things to try if its stuck.

1969 1750 Spider Veloce w/dual webers, 1969 1750 Berlina, 1971 1750 Spider Veloce w/ dual webers, 1985 Spider Veloce 23,000 orig. miles, {Two} 1986 Spider Veloces, 1987 Spider Veloce bought new, 1988 Quadrifoglio, 1991 164S, Plus several more. I think they are breeding.
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post #7 of 8 (permalink) Old 07-28-2017, 10:17 PM
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Listen to Jim. No need to remove anything: just reach in there and spin it.

Often the bearings rust up. If that's the problem you can get it working with manual spinning an copious application of spray lube.

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post #8 of 8 (permalink) Old 07-29-2017, 02:00 AM
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obviously make sure the 4 wires are still connected to the heater.....
and also worth trying to put 12V direct to heater to see if it works.

http://www.alfabb.com/bb/forums/spid...ench-test.html

Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.
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