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A/C, finally!
After many months my A/C on my 85 is working again. I installed a rebuilt Denso compressor, new expansion valve and new dryer. Used my gauges and pump to do a vacuum then added 134A. Just got back from a test ride and I got 52 at the vent on a 80 degree day with high humidity. But I still have a problem to figure out, when the blower is in high it tends to blow the number 2 fuse for A/C blower. I don't even know where to start. Any thoughts? Thanks, Nick
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08-12-2016, 02:45 PM
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Mighty Meatlocker Turbo
Join Date: Apr 2016
Location: North TexASS
Posts: 18,537
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Good job on getting the system going, Nick.
The fuse blowing would indicate high resistance in circuit. For starters, you can try cleaning all of the associated fuse and wire end contacts (including plug and socket at blower motor), butt more than likely, the motor bushings are worn, and the added friction is causing too high of an amp draw. |
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08-12-2016, 02:49 PM
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What about this thought, the fuses I use are the cheap plastic type that seem to be the only ones you can find at the auto parts store. I notice that in many cases it is not the metal part that breaks but the plastic melts on one side. I remember from my old VW Bug days the same fuses were ceramic. I think I will do a search and try one of those first. The plastic ones are so cheap they are squirt gun material.
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08-12-2016, 04:48 PM
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I was able to find plenty of ceramic type fuses on Amazon. I will try those first. If that does not help I will move on to the blower. With my A/C working again this is great news! on heatwave days of 100 degrees I will now be able to cool down to 90!!
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08-12-2016, 05:05 PM
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Mighty Meatlocker Turbo
Join Date: Apr 2016
Location: North TexASS
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08-12-2016, 05:10 PM
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Dang! Show off!!! Dang. I think my AC will work very well in the winter. This is So Cal after all!
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08-12-2016, 05:23 PM
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Mighty Meatlocker Turbo
Join Date: Apr 2016
Location: North TexASS
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^^^
Ha! "A/C that works well in the winter" sounds like that newfangled, electric a/c unit that is being made abroad (just kidding, Johnny H.!)! 
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08-12-2016, 05:40 PM
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Our host sells ceramic fuses.
__________________
1987 911 Carrera coupe - Guards Red 2010 997.2 C4S 6-Speed 2005 Mini Cooper Convertible (R52) - Wife's car 1977 VW Bay Window Camper Bus |
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08-12-2016, 07:36 PM
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Member 911 Anonymous
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+1^^^
Nick, if you keep popping the fuse or it shrinks, you may want to consider replacing the fuse block #1 where the blowing/shrinking fuse lays. I had to replace mine due to high resistance there, swapped no more shrinking fuse.
__________________
'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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08-12-2016, 07:40 PM
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OK Jim, I'll check it out. Man, I made a lot of mistakes working on my AC! I'm not a natural mechanic. But I try!!
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08-12-2016, 09:16 PM
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Really, the components and parts of our 35 year old A/C systems should look brand new considering that they probably only worked 6 years out of 35!!! Just kidding!!
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08-12-2016, 09:21 PM
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Member 911 Anonymous
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Quote:
__________________
'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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08-12-2016, 09:26 PM
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Don't think fuse "bridge" was mentioned. Not being electrician... I have no idea why this works. (Pic is from Pelican tech.) Your panel have this Nick? 
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Karl ~~~ Current: '80 Silver Targa w /'85 3.2. 964 cams, SSI, Dansk 2 in 1 out muf, custom fuel feed with spin on filter Prior: '77 Copper 924. '73 Black 914. '74 White Carrera. '79 Silver, Black, Anthracite 930s. |
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08-14-2016, 08:05 AM
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Yup!
I have that bridge.
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08-14-2016, 08:43 AM
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VERY impressive, I wish mine had lasted that long. |
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08-14-2016, 10:08 AM
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Mighty Meatlocker Turbo
Join Date: Apr 2016
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Quote:
 
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08-14-2016, 02:31 PM
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^^^That's not the thriller Rono... Post your vent porn!
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Karl ~~~ Current: '80 Silver Targa w /'85 3.2. 964 cams, SSI, Dansk 2 in 1 out muf, custom fuel feed with spin on filter Prior: '77 Copper 924. '73 Black 914. '74 White Carrera. '79 Silver, Black, Anthracite 930s. |
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08-14-2016, 03:35 PM
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Mighty Meatlocker Turbo
Join Date: Apr 2016
Location: North TexASS
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Since you insist, Karl (brace yourself, Nick!) . . .
Mid-upper 80s ambient =  Upper 90s ambient =  ^^^ How about them apples ?!?!?!
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08-14-2016, 03:52 PM
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OK, that's it! Tomorrow I'm just going to take my whole system apart. I have never heard of 29 in any car!!!!
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08-14-2016, 04:29 PM
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Ronnie, that's gonna give you brain freeze. That's just obnoxiously cold....Tim
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08-14-2016, 04:33 PM
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Porsche 911 Carrera
1987 Porsche 911 Carrera
Marble Grey
1974 Carrera
1979 930
1980 SC Targa
1988 Porsche 3.2 Targa
2012 Mini S
