A/C, Heater, Defrost fan stopped working today

greg donovan · Post by **greg donovan** » Fri Dec 07, 2007 7:26 pm

it has been making "non-normal" sounds for a while and it would stop working occasionally. however, in the past all i had to do was slide the temp lever back and forth from hot to cold a few times and it would start woking again.

not today.

i am pretty sure it isnt the fan relay because then it would at least work on "4" but it wont even do that.

is my motor shot or is there another fuse or something that could be bad?

how can i check to see if the motor is shot aside from just buying a new one?

ciper · Post by **ciper** » Fri Dec 07, 2007 7:53 pm

Is it the fan that stopped or everything? Like if you turn on AC does the compressor run?

First thing I'd check is the resistor pack under the glove box

greg donovan · Post by **greg donovan** » Fri Dec 07, 2007 8:19 pm

ciper wrote:Is it the fan that stopped or everything? Like if you turn on AC does the compressor run?

First thing I'd check is the resistor pack under the glove box

just checked. nothing is happening. AC compressor does not turn on.

there is a very quiet sound under the dash that sounds like a servo trying to move a lever when i push the heater control buttons.

i am pretty sure it isnt the resistor pack. had one of those go bad in another car and the fan only worked on 4 when it went bad, because there are only 3 resistors in there for speeds 1-4 and 4 is full current w/no resistor.

plus the AC compressor would still engage if the resitor pack was bad wouldnt it?

greg donovan · Post by **greg donovan** » Fri Dec 07, 2007 8:19 pm

ciper · Post by **ciper** » Fri Dec 07, 2007 8:26 pm

You're deductions are correct. I wonder if the plug at the back of your controls came loose?

greg donovan · Post by **greg donovan** » Fri Dec 07, 2007 8:28 pm

ciper wrote:You're deductions are correct. I wonder if the plug at the back of your controls came loose?

that would make me very happy if that were the case.

i asume that it is time to tear into the dash, inst it?

the more i think about that the more sense it makes.

that would explain why the compressor is not turning on.

greg donovan · Post by **greg donovan** » Sat Dec 08, 2007 7:14 am

just call me The Fonz.

i didnt have time to tear into the dash today but a well placed smack to the top of the dash where right above the heater controls kicked the fan back into action.

not sure if it caused the AC compressor to start as it was pretty dark and -4 out so i didnt feel lke looking. all i cared about was that it was warm in the car.

i will investigate more tomorrow.

Radial GT1 · Post by **Radial GT1** » Sat Dec 08, 2007 7:17 pm

I feel those temps buddy! Hope you smacked it back into shape! Wanna come smack my ECU back into shape, beings as you have the subaru "touch."

greg donovan · Post by **greg donovan** » Mon Dec 10, 2007 1:28 am

well, i guess i need to turn in my Fonzi fan club membership card.

it appears to be totally dead now.

it was -14 last night and it is 2 right now. i dont have a heated garage.

why cant this shit break when it is warm out?

Post by **Legacy777** » Mon Dec 10, 2007 7:48 pm

Your problem probably has something to do with the solder points on the control board

http://bbs.legacycentral.org/viewtopic.php?t=1142

greg donovan · Post by **greg donovan** » Mon Dec 10, 2007 10:07 pm

Legacy777 wrote:Your problem probably has something to do with the solder points on the control board

http://bbs.legacycentral.org/viewtopic.php?t=1142

that was what i was figuring.

i fail at searching.

thanks again for your documentation of everything you ever do on your car.

you must have amazing karma.

ciper · Post by **ciper** » Tue Dec 11, 2007 9:06 am

As a side note almost the exact same thing happens to the first generation Acura Legend which makes the low oil pressure light come on randomly. I think its a "common" thing for cars of our vintage.

n2x4 · Post by **n2x4** » Tue Dec 11, 2007 1:57 pm

+1 for what Josh said. I had 6 joints that were bad. Touched them back up and it's working just fine now.

greg donovan · Post by **greg donovan** » Tue Dec 11, 2007 3:46 pm

ciper wrote:As a side note almost the exact same thing happens to the first generation Acura Legend which makes the low oil pressure light come on randomly. I think its a "common" thing for cars of our vintage.

the age thing is really swaying me to perform a drivetrain swap into a 97+ impreza.

greg donovan · Post by **greg donovan** » Wed Dec 12, 2007 3:32 pm

we i got inside a heated garage last night and did some more trouble shooting.

in this case it is defiantely the fan motor that is shot. banging on the dash was just enough to jiggle it back into action.

all i have to do now is reach under the dash and tap/wiglle the fan motor and it fires right up.

time to seek out a new/used fan.

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A/C, Heater, Defrost fan stopped working today

A/C, Heater, Defrost fan stopped working today