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#1
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Heater fan speed
Being that it has been so cold here lately I've had my heater blower on max quite a bit. I've really noticed that the blower will change speeds depending on what other electrical items are running. For example, when I have my turn signal on the fan will slow with every flash of the signal. Also, when I speed up from a stop it'll start blowing much more.
The alternator was replaced a couple years ago, and I haven't had any issues starting on -x° mornings. The heater blows fine otherwise. So could this still be an alternator issue? Has anyone else experienced this behavior? |
#2
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Re: Heater fan speed
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__________________
1992 Pearl White LS-L "Ruslana" #4946 - 180k on body, 95k on engine. Mods: ECU bead crush, 15 min mod, 20 min mod, drilled/slotted rotors & Axxis ceramic brakes, SS lines, 17" Evoke F1 wheels, XS-HF137 Sony Xplod speakers, 6000k HID's (lows & fogs), resistor mod, 1½" Sleek Spoiler mod, custom exhaust by svxfiles, '02 WRX aluminum racing radiator by svxfiles, Summit Racing 400# x 300# springs w/ Koni's by svxfiles, ClassGlass fiberglass hood /w scoop, Nevin's rear sway bar, '97 grille, phenolic spacers, custom LED interior lighting, custom paint. †"War doesn't determine who is right, only who is left"† Work to be done: Tinted windows, clear/LED tail lights, tailbar mod, "Power Mode" mod, Supertone horns, clear corners & headlight lenses, 2 pc splitters or custom bumper, Alcyone side skirts, TruSpeed Stage III SVX Intake, Hydra, 4.44 tranny swap, JDM auto folding side mirrors, engine rebuild, super charger, STi seats, bone leather interior /w SVX emblem, dash overhaul, SVX decals, paint (stock color). Total cost?: 22k At least it's going down..
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#3
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Re: Heater fan speed
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If the turn signals affect it that much, It is not a good sign. Your voltage coming from the alternator is not able to keep up. What other things do you have on when it is affected(rear defrost, heated mirrors, Lights???) |
#4
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Re: Heater fan speed
Quote:
__________________
1992 Pearl White LS-L "Ruslana" #4946 - 180k on body, 95k on engine. Mods: ECU bead crush, 15 min mod, 20 min mod, drilled/slotted rotors & Axxis ceramic brakes, SS lines, 17" Evoke F1 wheels, XS-HF137 Sony Xplod speakers, 6000k HID's (lows & fogs), resistor mod, 1½" Sleek Spoiler mod, custom exhaust by svxfiles, '02 WRX aluminum racing radiator by svxfiles, Summit Racing 400# x 300# springs w/ Koni's by svxfiles, ClassGlass fiberglass hood /w scoop, Nevin's rear sway bar, '97 grille, phenolic spacers, custom LED interior lighting, custom paint. †"War doesn't determine who is right, only who is left"† Work to be done: Tinted windows, clear/LED tail lights, tailbar mod, "Power Mode" mod, Supertone horns, clear corners & headlight lenses, 2 pc splitters or custom bumper, Alcyone side skirts, TruSpeed Stage III SVX Intake, Hydra, 4.44 tranny swap, JDM auto folding side mirrors, engine rebuild, super charger, STi seats, bone leather interior /w SVX emblem, dash overhaul, SVX decals, paint (stock color). Total cost?: 22k At least it's going down..
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#5
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Re: Heater fan speed
Not anything to worry about. You could help it by getting a high output alternator or by doing the extra wiring that some members have done(battery directly to alternator, grounding, etc). That provides a more "true" connection for less restriciton providing better electricity flow.
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#6
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Re: Heater fan speed
My silver's fan changes pitch in time to the blinkers when at idle, and the headlights pulse and dim as I approach a stop; been that way since I got it. The teal has never exhibited any such behavior. Guess which alternator recently died?
I've always thought these symptoms suggested a charging issue, but it hasn't been a problem with mine. Yet. I put in a new El-Cheapo battery when I bought the car 2+ years ago and it has never faltered. dcb |
#7
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Re: Heater fan speed
I usually have the low beams (HID) on but other than that usually just the cd player. I use the defroster but that's usually not on when he heater is blowing strangely.
I was thinking about doing the additional alternator wiring and probably will soon. That higher output alternator would be nice but it seems kind of pricey. |
#8
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Re: Heater fan speed
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#9
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Re: Heater fan speed
There's about 160k on it currently but... if I were to take an average of all the major parts there would be far less
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#10
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Re: Heater fan speed
Yeah, isn't that the case with these cars- If there is 160k on the alternator it may be starting to weaken and could fail at any time. Or it could continue to work the way it is for many years-never can tell. Just keep in mind you might be looking for a replacement at any time.
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#11
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Re: Heater fan speed
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Cheers! Gordon 1997 Ebony #308 113k "The Black Diva"SOLD 1992 Black over Liquid Silver 152k SOLD 1992 Ebony 251k 444 SOLD 1999 Silver SLK230 134k SOLD 1997 Green Outback 137k SOLD 2013 Honda Accord I4 SOLD 2015 Subaru Crosstrek 30k 2018 Tesla M3 30k |
#12
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Re: Heater fan speed
I would connect a digital DC voltage tester to the positive and negative battery terminal and check the voltage.
Then start the engine and check the voltage adding different loads (components) and with various rpm's. Make sure the alternator output is correct. Keith |
#13
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Re: Heater fan speed
also... If you haven't oiled your fan motor, I would highly recommend doing that. Only need to remove the lower end of the motor with a Philips screwdriver. Be prepared for some icky stuff to fall out when you take the bottom of the motor off! That is about the simplest and easiest thing that we can do to our cars!
Keith |
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