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vwjedi Samba Member
Joined: November 29, 2005 Posts: 1463 Location: G-ville, FL - hopefully on a trail.
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Posted: Wed May 07, 2014 12:27 pm Post subject: Another RedTek conversion thread. Nekid pics inside! |
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Tried a jazzy new thread title to get some views, hope this helps.
So after reading all I could find I have done the RedTeK conversion:
Blew out the snot in the lines, dropped the evaporator and cleaner her up, replaced every line seal, new receiver/drier, new oil in the compressor.
Now running about 35 psi on low side with 4 cans, she blows cold but the A/C relay for the evaporator switch is not cutting the fans on unless I manually jump it with piece of tape.
Tried a new relay from FLAPS, it is a 30 amp but same symptoms. So close! Please help. Thanks _________________ 1987 Wolfsburg T25 still riding out. A bunch of other VW's passed on...
Last edited by vwjedi on Mon May 12, 2014 7:26 am; edited 1 time in total |
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vwjedi Samba Member
Joined: November 29, 2005 Posts: 1463 Location: G-ville, FL - hopefully on a trail.
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Posted: Wed May 07, 2014 12:46 pm Post subject: |
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black relay is what I replaced the OG one with. Neither kick on the fan and compressor unless I "manually" make the connection??
_________________ 1987 Wolfsburg T25 still riding out. A bunch of other VW's passed on...
Last edited by vwjedi on Mon May 12, 2014 7:28 am; edited 1 time in total |
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crazyvwvanman Samba Member
Joined: January 28, 2008 Posts: 9895 Location: Orbiting San Diego
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Posted: Wed May 07, 2014 1:22 pm Post subject: |
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That relay is only for speed #4, the highest evap fan speed. Speeds 1,2,3 don't use it.
Mark |
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vwjedi Samba Member
Joined: November 29, 2005 Posts: 1463 Location: G-ville, FL - hopefully on a trail.
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Posted: Wed May 07, 2014 2:11 pm Post subject: |
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Thanks,
I noticed it only runs the fan on high speed no matter if the switch is on 1,2,3, or 4 ???
Also, the idle speeds up and the front rad. fan kicks on as well. Any more ideas why? Perhaps it is the other A/C "relay C" on page 87.5 in the Bentley?
(far right #13 in first picture) _________________ 1987 Wolfsburg T25 still riding out. A bunch of other VW's passed on... |
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crazyvwvanman Samba Member
Joined: January 28, 2008 Posts: 9895 Location: Orbiting San Diego
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Posted: Wed May 07, 2014 2:16 pm Post subject: |
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If you force the relay on you will get speed 4. The fan speed selector switch is supposed to determine the speed. Have you checked it?
Mark
vwjedi wrote: |
Thanks,
I noticed it only runs the fan on high speed no matter if the switch is on 1,2,3, or 4 ???
Also, the idle speeds up and the front rad. fan kicks on as well. Any more ideas why? Perhaps it is the other A/C "relay C" on page 87.5 in the Bentley?
(far right #13 in first picture) |
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vwjedi Samba Member
Joined: November 29, 2005 Posts: 1463 Location: G-ville, FL - hopefully on a trail.
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Posted: Thu May 08, 2014 10:09 am Post subject: |
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The fan speed selector switch felt little dicey, I replaced both temp regulator switch and fan speed selector.
_________________ 1987 Wolfsburg T25 still riding out. A bunch of other VW's passed on... |
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vwjedi Samba Member
Joined: November 29, 2005 Posts: 1463 Location: G-ville, FL - hopefully on a trail.
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Posted: Mon May 12, 2014 7:25 am Post subject: |
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Still trying to get this nailed down. The constant pressure on the "low pressure side" is at about 55 psi as seen here:
When I "manually" kick on the relay and the compressor clutch engages I get a pressure between 20-30 psi. Is this the optimum low pressure side I am looking for?
_________________ 1987 Wolfsburg T25 still riding out. A bunch of other VW's passed on... |
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Terry Kay Banned
Joined: June 22, 2003 Posts: 13331
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Posted: Mon May 12, 2014 7:35 am Post subject: |
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How long did you put the vacuum pump onto the system & suck it down?
How long did it hold that vacuum with the pump & valves shut off? _________________ T.K. |
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vwjedi Samba Member
Joined: November 29, 2005 Posts: 1463 Location: G-ville, FL - hopefully on a trail.
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Posted: Mon May 12, 2014 9:08 am Post subject: |
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TK-
I ran el cheapo Harbor Freight vacuum for about 6 hrs, it held the vacuum for probly a week before i got around to filling the system.
With 4 cans pressure was WAY up, over 90psi on the low side so I drained a little pressure off to what you see here.
I have an extra can left over....? _________________ 1987 Wolfsburg T25 still riding out. A bunch of other VW's passed on... |
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Terry Kay Banned
Joined: June 22, 2003 Posts: 13331
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Posted: Mon May 12, 2014 9:24 am Post subject: |
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3 possible problems ;
(A) you've still got moisture in the system.
(B) the expansion valve is screwed up.
And I'm asking this one cause I didn't see it mentioned ;
Is the radiator fan on full blast as you turn the system on?
Of course you have a box fan blowing into the lower grill as your doing all of this(?)
Plus you have too much freon in it which may be part of the problem. _________________ T.K. |
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vwjedi Samba Member
Joined: November 29, 2005 Posts: 1463 Location: G-ville, FL - hopefully on a trail.
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Posted: Mon May 12, 2014 9:38 am Post subject: |
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A) Moisture in the system.
I guess this is possible but would it prevent the fan/ compressor from cutting on all together?
B) Expansion valve is screwed up.
As in not expanding? I realized the pressure was pretty high so I drained a little off. Now showing 20-25 psi with compressor kicked on. Isn't this ideal?
Box fan? No but driving around and moving air that way when turned on.
Too much freon? Drain more? Thinking high pressure switch is doing its thing? _________________ 1987 Wolfsburg T25 still riding out. A bunch of other VW's passed on... |
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Sir Sam Samba Member
Joined: July 19, 2009 Posts: 1669 Location: Fort Collins Colorado!
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Posted: Mon May 12, 2014 9:47 am Post subject: |
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If you don't have air moving past the condensor while you are looking at pressures you won't be able to get good data. _________________ '91 Carat Westy
87' Syncro + '87 Westy conversion coming soon |
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vwjedi Samba Member
Joined: November 29, 2005 Posts: 1463 Location: G-ville, FL - hopefully on a trail.
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Posted: Mon May 12, 2014 10:39 am Post subject: |
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Sir Sam wrote: |
If you don't have air moving past the condensor while you are looking at pressures you won't be able to get good data. |
oh?
(goes to store for box fan) _________________ 1987 Wolfsburg T25 still riding out. A bunch of other VW's passed on... |
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dobryan Samba Member
Joined: March 24, 2006 Posts: 16473 Location: Brookeville, MD
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Terry Kay Banned
Joined: June 22, 2003 Posts: 13331
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Posted: Mon May 12, 2014 1:07 pm Post subject: |
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<<A) Moisture in the system.
I guess this is possible but would it prevent the fan/ compressor from cutting on all together?>>
Nope.
If you have any pressure in the system the compressor will kick on.
<<B) Expansion valve is screwed up.
As in not expanding? I realized the pressure was pretty high so I drained a little off. Now showing 20-25 psi with compressor kicked on. Isn't this ideal?>>
Nope--
Preventing the system from diiferentianting from high pressure side to the low , which sounds like what's happening here.
You do have a AC instruction & training manual that cover's all of the AC operation features, with an explaination of how the system functions--right?
<<Box fan? No but driving around and moving air that way when turned on.>>
So, you are servicing the system when your on the roll?
You MUST have a box fan on the lower grill where the condensor is to duplicate the air movement as if the van was moving--
<<Too much freon? Drain more? Thinking high pressure switch is doing its thing?>>
If you didn't suck the system down long enough, still have moisture in there, if the expansion valve is stuck, if you don't have enough of a vacuum, or if you don't have a fan on the condensor while charging --it just isn't going to work. _________________ T.K. |
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vwjedi Samba Member
Joined: November 29, 2005 Posts: 1463 Location: G-ville, FL - hopefully on a trail.
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Posted: Tue Jul 22, 2014 8:16 am Post subject: |
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Dilemma was solved. It was
D. None of the above.
I found a lose connection at the fuse block, repaired and blowing nice and chilly.
Total game changer in Florida! _________________ 1987 Wolfsburg T25 still riding out. A bunch of other VW's passed on... |
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