Engine blower fan question
Thread Starter
Instructor
Joined: Jul 2005
Posts: 232
Likes: 0
From: shropshire U.K
Engine blower fan question
One thing i have never noticed ;is the engine blower fan staying on after i switch the engine off.
Saying that when driving my car normally shortish journeys 50 miles or so the temp guage never seems to go past the first white marker.
The heating and ventilation seem to work fine.
Is this a cause for concern ? or is it that the engine is just not getting hot enought to warrant the fan staying on?
cheers stu
Saying that when driving my car normally shortish journeys 50 miles or so the temp guage never seems to go past the first white marker.
The heating and ventilation seem to work fine.
Is this a cause for concern ? or is it that the engine is just not getting hot enought to warrant the fan staying on?
cheers stu
Last edited by stuart1997; Jan 31, 2006 at 04:46 PM.
Burning Brakes
Joined: Feb 2004
Posts: 756
Likes: 1
From: Wilmington, NC
Does the blower cool the engine, blowing cooler air through the exchangers? Does this cool the exhaust after the engine is off.
I ask because every once in a while mine use to come on when the engine was turned off. I have since removed it.....should I put it back on?
Duncan
I ask because every once in a while mine use to come on when the engine was turned off. I have since removed it.....should I put it back on?
Duncan
Drifting
Joined: Jul 2005
Posts: 3,363
Likes: 25
From: NY, USA
Mine has come on. I was playing around with the Hammer in the drive and let it idle for quite a while. Managed to get the temp up to about the 9 o'clock position in order to test some inputs. After shutting down I was surprised a short while later when the fan kicked on. That was the only time, but I was pleased that it did work.
Burgled
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Rennlist Member
Joined: Aug 2003
Posts: 22,383
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From: Altamonte Springs, Fl/Gwynns Island, Va.
It is suppose to come on if it gets to a certain temp after it has been turned off. Mine just hasnt reached that magic number at least while I could hear it running.
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Technical Guru
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Joined: May 2002
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From: USVI
From the dealer mechanic training manuals (not the workshop manuals), "Ballast resistor (R) is located in an air guide on the pressure end of the rear heater blower. The ballast resistor holder is engaged in an opening of the air guide. A NTC temperature sensor (T) is located in the same air guide. The temperature sensor can be removed by turning it 90'. Temperature sensor (T) switches on the rear heater blower independent of the above mentioned blower switch positions:
At approx. 45 ... 75'C in basic stage (9 V)
< 40'C basic stage off
> 75'C to max speed stage
< 70'C max. speed stage off
If the ignition was turned on for at least 30 seconds, temperature sensor (T) activates pertinent after running of the heater blower which could be max 15 minutes long on a stopped car (ignition off). Electronics of heater/air conditioner controls monitor temperature signals up to 15 minutes after the switching-off of blower after-running or after turning off the ignition. Heater blower after-running with temperature > 95'C and ignition turned off.
After-running switched off at approx. 93'C"
At approx. 45 ... 75'C in basic stage (9 V)
< 40'C basic stage off
> 75'C to max speed stage
< 70'C max. speed stage off
If the ignition was turned on for at least 30 seconds, temperature sensor (T) activates pertinent after running of the heater blower which could be max 15 minutes long on a stopped car (ignition off). Electronics of heater/air conditioner controls monitor temperature signals up to 15 minutes after the switching-off of blower after-running or after turning off the ignition. Heater blower after-running with temperature > 95'C and ignition turned off.
After-running switched off at approx. 93'C"
Burning Brakes
Joined: Feb 2004
Posts: 756
Likes: 1
From: Wilmington, NC
Jason,
That was some very good info, I think that we all learned something new.
What you're saying is, the fan is suppose to come on while the car is off, and can possibly run for upwards of fifteen minutes.
Now for the million dollar question........is it hurting my ride to NOT have that blower in place? I removed it because it was making noise.
Duncan
That was some very good info, I think that we all learned something new.
What you're saying is, the fan is suppose to come on while the car is off, and can possibly run for upwards of fifteen minutes.
Now for the million dollar question........is it hurting my ride to NOT have that blower in place? I removed it because it was making noise.
Duncan
Burning Brakes
Joined: Jul 2004
Posts: 980
Likes: 1
From: Toronto, Canada
Originally Posted by Dunasso
... the fan is suppose to come on while the car is off, and can possibly run for upwards of fifteen minutes.
Now for the million dollar question........is it hurting my ride to NOT have that blower in place? I removed it because it was making noise.
Duncan
Now for the million dollar question........is it hurting my ride to NOT have that blower in place? I removed it because it was making noise.
Duncan
I seem to remember that the Cup cars had no blowers, can someone confirm this? If true, it seems likely you're fine, although maybe the Cup owners were expected to cool the engine bay manually (fans, etc) when the cars were very hot?
Racer
Joined: Nov 2004
Posts: 476
Likes: 1
From: Portsmouth UK
Mine stays on sometimes, but that due to a sticky relay in engine compartment control box.
I just give it a smack and it stops! I cant get in the box to change the relay at present, due to cover securing nuts are so coroded they wont undo!
I just give it a smack and it stops! I cant get in the box to change the relay at present, due to cover securing nuts are so coroded they wont undo!
Instructor
Joined: Jul 2003
Posts: 134
Likes: 0
From: Houston, TX
Mine used to stay on when I bought the car. Even if I started the car for just a few seconds, cold engine, the fan would run for 10/15 mn after that.
No need to tell the battery did not like it.
Went to the dealer, they changed something (thermostat ?) and I don't remember earing that fan again since then.
-Guillaume
No need to tell the battery did not like it.
Went to the dealer, they changed something (thermostat ?) and I don't remember earing that fan again since then.
-Guillaume