A/C & heater blower just stopped

Jim Burnette · #1 (**permalink**) 07-01-2008, 04:03 PM

I have a 1991 164 base model with about 114,000 miles. I have never had a problem with the blower fan for the heater & A/C but today without any symptoms before hand I was cruising down the highway with the A/C going full blast and suddenly the fan just stopped. When I try turning the A/C on again the lights come on and in Auto the fan lights slowly go from 1 to 4 but the fan is not blowing. Is there a fuse that I don't know about? I have tried looking under the dash and the 40 amp fuse behind the false firewall looks good. Has the motor just died? I would think if it were the motor it would have maybe given some symptoms or died a little less suddenly, but maybe I am wrong.
Any help would be greatly appreciated.

Alfisto Steve · #2 (**permalink**) 07-01-2008, 04:07 PM

Quote:

Originally Posted by Jim Burnette

I have a 1991 164 base model with about 114,000 miles. I have never had a problem with the blower fan for the heater & A/C but today without any symptoms before hand I was cruising down the highway with the A/C going full blast and suddenly the fan just stopped. When I try turning the A/C on again the lights come on and in Auto the fan lights slowly go from 1 to 4 but the fan is not blowing. Is there a fuse that I don't know about? I have tried looking under the dash and the 40 amp fuse behind the false firewall looks good. Has the motor just died? I would think if it were the motor it would have maybe given some symptoms or died a little less suddenly, but maybe I am wrong.
Any help would be greatly appreciated.

Jim Burnette · #3 (**permalink**) 07-01-2008, 04:18 PM

Thanks Steve, I don't have a tester but I believe I have another 40 amp bar fuse I can replace it with. I will see if I can find it and give it a try.

Jim Burnette · #4 (**permalink**) 07-01-2008, 04:42 PM

I took the old 40 amp fuse bar off and I really thought that was the problem because right where where it hooked onto one of the terminals there was a crack about 3/4 of the way through the bar but I replaced it with a new one and made sure the connections were good but still no fan. It will be tomorrow before I can get a tester but in the mean time do you have any other suggestions? Thanks for your help.
Jim

Alfisto Steve · #5 (**permalink**) 07-01-2008, 05:02 PM

Quote:

Originally Posted by Jim Burnette

I took the old 40 amp fuse bar off and I really thought that was the problem because right where where it hooked onto one of the terminals there was a crack about 3/4 of the way through the bar but I replaced it with a new one and made sure the connections were good but still no fan. It will be tomorrow before I can get a tester but in the mean time do you have any other suggestions? Thanks for your help.
Jim

Jim Burnette · #6 (**permalink**) 07-01-2008, 05:34 PM

Steve I owe you another apology. I decided before going to anything more drastic I would try replacing the 10 amp fuse under the snow flake emblem just to give it a try. It had looked good when I first looked at the fuse box but once replaced the voila the fan now works. I feel like an idiot and I hope you will forgive me for wasting your time. I really thought I had given all the information because to just look at this fuse in the box it looked good.
Anyway if I ever do run into you I owe you several cold beers.

jrreeve · #7 (**permalink**) 07-01-2008, 06:17 PM

Hmm...think i need a new one?

Anyone know where I can get a new unit? Not just the bar, but the whole bracket, its trashed.

Rob
'91 164S

Alfisto Steve · #8 (**permalink**) 07-01-2008, 06:38 PM

Quote:

Originally Posted by jrreeve

Hmm...think i need a new one?

Anyone know where I can get a new unit? Not just the bar, but the whole bracket, its trashed.

Rob
'91 164S

jrreeve · #9 (**permalink**) 07-01-2008, 06:58 PM

Steve,
Which do you mean? Set A or B? Set B is wired to the 40 AMP fuse. The others, I cannot say, i have not traced them back yet. I am finding some oddities with the wiring around here.

Any one with a spare?

Rob
'91 164S

Alfisto Steve · #10 (**permalink**) 07-02-2008, 07:06 AM

Quote:

Originally Posted by jrreeve

Steve,
Which do you mean? Set A or B? Set B is wired to the 40 AMP fuse. The others, I cannot say, i have not traced them back yet. I am finding some oddities with the wiring around here.

Any one with a spare?

Rob
'91 164S

jrreeve · #11 (**permalink**) 07-02-2008, 08:13 AM

1. Both A wires are black. (maybe one is covered in oil or dirt or something...have to check)

2. Wires B have a 40 AMP fuse in line between them, perhaps because the fusable bar/link (60777267) was blown and the fuse holder (7619808) was burned? Just a guess, i can't think of any other reason to put a jumper there. As FYI, pulled the 40 AMP fuse, and it looks good.

I wonder if the fan bearings failed, melted the block, was fixed and then someone wired the 40AMP fuse inline rather than get a replacement. Sound feasable?

I can definitely get the fuse bar. I'm working on getting another fuse block (7619808) now.

Easy way to check the fan? Turn on the A/C and see if the radiator fan starts on low? I noticed that when the A/C is turned on, i hear an audible "click" coming from the engine bay. The A/C works fine...the radiator fan...has me worried.

Thanks for the input and the P/Ns.

Rob
'91 164S

Alfisto Steve · #12 (**permalink**) 07-02-2008, 09:16 AM

Quote:

Originally Posted by jrreeve

1. Both A wires are black. (maybe one is covered in oil or dirt or something...have to check)

2. Wires B have a 40 AMP fuse in line between them, perhaps because the fusable bar/link (60777267) was blown and the fuse holder (7619808) was burned? Just a guess, i can't think of any other reason to put a jumper there. As FYI, pulled the 40 AMP fuse, and it looks good.

I wonder if the fan bearings failed, melted the block, was fixed and then someone wired the 40AMP fuse inline rather than get a replacement. Sound feasable?

I can definitely get the fuse bar. I'm working on getting another fuse block (7619808) now.

Easy way to check the fan? Turn on the A/C and see if the radiator fan starts on low? I noticed that when the A/C is turned on, i hear an audible "click" coming from the engine bay. The A/C works fine...the radiator fan...has me worried.

Thanks for the input and the P/Ns?

Rob
'91 164S