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-   -   94 e320 aux fan not working with ac (http://www.peachparts.com/shopforum/tech-help/411766-94-e320-aux-fan-not-working-ac.html)

speednjay 04-09-2021 07:59 PM
94 e320 aux fan not working with ac
 
Was working properly last year .. this year I guess not. It does still switch on for cooling. What would be the first thing to check? Is there a separate relay?

Diseasel300 04-09-2021 08:16 PM
The fan runs on low speed based on refrigerant pressure. If you're low on charge, the head pressure may not be high enough to switch the fan on.

speednjay 04-09-2021 08:33 PM
Ac runs beautifully when moving. I’ll check that resistor

nulu 04-09-2021 09:52 PM
take the 6 screws of fuse box cover to expose the 2 relays that control fans 1 is green with a fuse built in the other is blue with a fuse built in likey the fuse isw blown

speednjay 04-30-2021 06:47 PM
Anyone have go to place to get that resistor?

engatwork 04-30-2021 07:28 PM
Have you put 12 volts straight to the fans yet?

speednjay 05-01-2021 03:18 PM
Quote:
Originally Posted by engatwork (Post 4162488)
Have you put 12 volts straight to the fans yet?
The fans work. The ac isn’t switching them on

Diseasel300 05-01-2021 03:50 PM
Quote:
Originally Posted by speednjay (Post 4162670)
The fans work. The ac isn’t switching them on
How long is this thread going to continue before you check the head pressure? Fans won't switch on until ~220PSI or so. If you're low on charge or the ambient temp is low, the fans won't kick on.

speednjay 05-01-2021 10:24 PM
So I got it running. Nosing around checking things and found the “d” fuse was melted. Replaced cleaned up things. Checked the relay fuses. Not sure if that was it because the fans do work when the engine got hot.

rrgrassi 05-02-2021 06:29 AM
I thought the Aux fans were AC refrigerant temperature related. They are not coming on on my 91 w.124 300D either. I am trying to find the wiring connections to do the direct 12 test. The 91 still called for R12.


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