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baltik
Samba Member
Joined: April 08, 2015
Posts: 440
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 Posted: Sun Jul 12, 2020 10:24 pm Post subject: AC clutch and radiator fan engage, but fan in headbanger doesn't |
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Tried to fire up the AC after a long hiatus and was suprised that the fan in the headbanger didn’t come on, the fuses behind the westy cabinet all look good, what’s the next place to check?
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ProspectiveOwnergon
Samba Member
Joined: May 22, 2020
Posts: 211
Location: SoCal
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| Posted: Mon Jul 13, 2020 8:25 am Post subject: Re: AC clutch and radiator fan engages but fan in headbanger doesnt |
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| I have this EXACT same issue. Prior to vacuuming my system the fans would all turn on, but post that, I can't get the blower fan to turn on and my fuses are all golden. It's driving me NUTSO because all I was trying to do was recharge my system (that's a separate annoyance!) |
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dobryan
Samba Member
Joined: March 24, 2006
Posts: 16505
Location: Brookeville, MD
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| Posted: Mon Jul 13, 2020 8:59 am Post subject: Re: AC clutch and radiator fan engages but fan in headbanger doesnt |
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| ProspectiveOwnergon wrote: |
| I have this EXACT same issue. Prior to vacuuming my system the fans would all turn on, but post that, I can't get the blower fan to turn on and my fuses are all golden. It's driving me NUTSO because all I was trying to do was recharge my system (that's a separate annoyance!) |
I'd check the wiring to the fan resistors in the headbanger. I believe you can get access to them from the front of the headbanger. Maybe you knocked the wires off or broke the resistors. They are about the size of your thumb.
_________________
Dave O
'87 Westy w/ 2002 Subaru EJ25 and Peloquin TBD
"To travel hopefully is a better thing than to arrive." Robert Louis Stevenson
MD>Canada>AK>WA>OR>CA>AZ>UT>WY>SD
https://www.thesamba.com/vw/forum/viewtopic.php?t=620646
Building a bus for travel in Europe (euroBus)
https://www.thesamba.com/vw/forum/viewtopic.php?t=695371
The Western Syncro build
https://www.thesamba.com/vw/forum/viewtopic.php?t=746794 |
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ProspectiveOwnergon
Samba Member
Joined: May 22, 2020
Posts: 211
Location: SoCal
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| Posted: Mon Jul 13, 2020 9:13 am Post subject: Re: AC clutch and radiator fan engages but fan in headbanger doesnt |
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| dobryan wrote: |
| ProspectiveOwnergon wrote: |
| I have this EXACT same issue. Prior to vacuuming my system the fans would all turn on, but post that, I can't get the blower fan to turn on and my fuses are all golden. It's driving me NUTSO because all I was trying to do was recharge my system (that's a separate annoyance!) |
I'd check the wiring to the fan resistors in the headbanger. I believe you can get access to them from the front of the headbanger. Maybe you knocked the wires off or broke the resistors. They are about the size of your thumb. |
I DID fix the two brackets that hold it to the roof so my hands were in there pushing things around. Do you happen to have pictures/schematics for it that I can reference? |
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Syncro Jael
Samba Member
Joined: December 19, 2013
Posts: 2204
Location: Utah
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| Posted: Mon Jul 13, 2020 9:14 am Post subject: Re: AC clutch and radiator fan engages but fan in headbanger doesnt |
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I bypassed the resistors and installed a PWM variable speed switch. We love it! And no more resistors and gobbling up all the power to just waste as heat.
https://www.thesamba.com/vw/forum/viewtopic.php?t=738697&highlight=
_________________
1987 Syncro Westfalia Hightop - NAHT
Subaru EJ25 Forged Frankenmotor, Triple Knob.
Jael = (Mountain Goat) |
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dobryan
Samba Member
Joined: March 24, 2006
Posts: 16505
Location: Brookeville, MD
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| Posted: Mon Jul 13, 2020 9:52 am Post subject: Re: AC clutch and radiator fan engages but fan in headbanger doesnt |
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| ProspectiveOwnergon wrote: |
| dobryan wrote: |
| ProspectiveOwnergon wrote: |
| I have this EXACT same issue. Prior to vacuuming my system the fans would all turn on, but post that, I can't get the blower fan to turn on and my fuses are all golden. It's driving me NUTSO because all I was trying to do was recharge my system (that's a separate annoyance!) |
I'd check the wiring to the fan resistors in the headbanger. I believe you can get access to them from the front of the headbanger. Maybe you knocked the wires off or broke the resistors. They are about the size of your thumb. |
I DID fix the two brackets that hold it to the roof so my hands were in there pushing things around. Do you happen to have pictures/schematics for it that I can reference? |
here is a pic from the gallery. There are two resistors, one on the other side of the fan too.
_________________
Dave O
'87 Westy w/ 2002 Subaru EJ25 and Peloquin TBD
"To travel hopefully is a better thing than to arrive." Robert Louis Stevenson
MD>Canada>AK>WA>OR>CA>AZ>UT>WY>SD
https://www.thesamba.com/vw/forum/viewtopic.php?t=620646
Building a bus for travel in Europe (euroBus)
https://www.thesamba.com/vw/forum/viewtopic.php?t=695371
The Western Syncro build
https://www.thesamba.com/vw/forum/viewtopic.php?t=746794 |
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ProspectiveOwnergon
Samba Member
Joined: May 22, 2020
Posts: 211
Location: SoCal
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| Posted: Mon Jul 13, 2020 11:58 am Post subject: Re: AC clutch and radiator fan engages but fan in headbanger doesnt |
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Mine is fully encased in plastic. 1990 camper.
https://imgur.com/a/kfjheJM |
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ProspectiveOwnergon
Samba Member
Joined: May 22, 2020
Posts: 211
Location: SoCal
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| Posted: Mon Jul 13, 2020 3:21 pm Post subject: Re: AC clutch and radiator fan engage, but fan in headbanger doesn't |
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To OP, here is the pages of note in Bentley. 87.4-5
Middle relay is for the evap fans (171 937 503) and the two fuses are for each fan. Measure voltage to see if relay is kicking on maybe? |
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dgbeatty
Samba Member
Joined: October 26, 2006
Posts: 702
Location: Sacramento
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| Posted: Wed Aug 25, 2021 3:05 pm Post subject: Re: AC clutch and radiator fan engage, but fan in headbanger doesn't |
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I don't see what year you have! Are you saying none of the four speeds work? There are multiple versions of the A/C harness and diagrams.
You say the fuses "look" good, but did you test them? What were the results. Speeds 1 & 2 do not have relays. Speed 3 uses the combination relay while Speed 4 has its' own relay. The common denominator is the fan switch and the 2 20amp fuses.
Come back with more information.
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Schau in das Buch |
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