Home » Public Forums » GMCnet » a/c compressor not engaging (low refrigerant?)
Re: [GMCnet] a/c compressor not engaging [message #345216 is a reply to message #345212] |
Sat, 13 July 2019 06:41 |
Ken Henderson
Messages: 8726 Registered: March 2004 Location: Americus, GA
Karma:
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Senior Member |
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And don't forget the unreliable ground connection of the motor through a
single jumper to the motor's mounting flange.
Ken H.
On Sat, Jul 13, 2019 at 3:14 AM Ken Burton via Gmclist <
gmclist@list.gmcnet.org> wrote:
> HI Deb. This is meant as a compliment. You can not believe how great it
> is to have someone here giving complete on topic information when requesting
> help. I have not commented on this thread because everybody here has been
> giving you good responses.
>
> I agree that you have two different problems and that you need to fix the
> blower problem first. A couple of comments on the blower motor problem and
> you may already know this.
>
> There are two different power sources for the blower motor. The first is
> through a 25 amp fuse and it supplies voltage to the blower motor through
> the fan switch and the blower motor resistor for all speeds EXCEPT the
> highest speed. In the highest fan speed this same circuit powers a the fan
> relay coil.
>
> Energizing this relay coil changes the power for the blower to a different
> power source. This source is a wire with fusible link direct from the
> center terminal of the isolator which is effectively direct from the
> alternator. So in the high speed fan switch position power from the 25
> amp fuse
> will energize the relay coil (you can feel it if you hold the cover while
> someone else moves the switch to high and back) but if the engine
> alternator is not running, then no power will be applied to the blower
> motor from the isolator / alternator connection.
>
> So if all speeds fail suspect the 25 amp fuse.
>
> If only high speed fails WITH THE ENGINE RUNNING suspect the high speed
> wire, or the inline fusible link (not the one on the relay) or fuse, or
> relay,
> or burned connections which are very common.
>
> If only one or more low speeds fail but high speed works, suspect the fan
> resistor, or fan switch, or again a burned connection on either or these or
> the fan relay.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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a/c compressor not engaging
By: Deb on Thu, 11 July 2019 14:36
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Re: a/c compressor not engaging
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Re: a/c compressor not engaging
By: Deb on Thu, 11 July 2019 15:34
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Re: a/c compressor not engaging
By: Deb on Thu, 11 July 2019 17:34
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Re: a/c compressor not engaging
By: roy1 on Thu, 11 July 2019 20:40
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Re: a/c compressor not engaging
By: Deb on Thu, 11 July 2019 21:10
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Re: a/c compressor not engaging
By: Deb on Thu, 11 July 2019 22:02
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Re: [GMCnet] a/c compressor not engaging
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Re: [GMCnet] a/c compressor not engaging
By: Deb on Fri, 12 July 2019 00:00
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Re: [GMCnet] a/c compressor not engaging
By: roy1 on Fri, 12 July 2019 00:46
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Re: [GMCnet] a/c compressor not engaging
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Re: [GMCnet] a/c compressor not engaging
By: Deb on Fri, 12 July 2019 13:59
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Re: [GMCnet] a/c compressor not engaging
By: Deb on Fri, 12 July 2019 17:01
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Re: [GMCnet] a/c compressor not engaging
By: 6cuda6 on Fri, 12 July 2019 18:10
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Re: a/c compressor not engaging
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Re: a/c compressor not engaging
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Re: [GMCnet] a/c compressor not engaging
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Re: [GMCnet] a/c compressor not engaging
By: Deb on Sat, 13 July 2019 11:23
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Re: [GMCnet] a/c compressor not engaging
By: Deb on Sat, 13 July 2019 16:38
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Re: [GMCnet] a/c compressor not engaging
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Re: [GMCnet] a/c compressor not engaging
By: Deb on Sun, 14 July 2019 13:58
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Re: [GMCnet] a/c compressor not engaging
By: Deb on Sun, 14 July 2019 15:12
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Re: [GMCnet] a/c compressor not engaging
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Re: [GMCnet] a/c compressor not engaging
By: 6cuda6 on Sun, 14 July 2019 16:40
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Re: [GMCnet] a/c compressor not engaging
By: Deb on Sun, 14 July 2019 16:43
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Re: [GMCnet] a/c compressor not engaging
By: Deb on Sun, 14 July 2019 17:17
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Re: [GMCnet] a/c compressor not engaging
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Re: [GMCnet] a/c compressor not engaging
By: Deb on Sun, 14 July 2019 18:59
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Re: [GMCnet] a/c compressor not engaging
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Re: [GMCnet] a/c compressor not engaging
By: Deb on Mon, 15 July 2019 09:55
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Re: [GMCnet] a/c compressor not engaging
By: Deb on Mon, 15 July 2019 12:38
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Re: [GMCnet] a/c compressor not engaging
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Re: [GMCnet] a/c compressor not engaging
By: Deb on Mon, 15 July 2019 13:39
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Re: [GMCnet] a/c compressor not engaging
By: k2gkk on Mon, 15 July 2019 14:14
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Re: [GMCnet] a/c compressor not engaging
By: Deb on Mon, 15 July 2019 14:53
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Re: [GMCnet] a/c compressor not engaging
By: Deb on Wed, 14 August 2019 13:53
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Re: a/c compressor not engaging
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Re: a/c compressor not engaging
By: JohnL455 on Wed, 14 August 2019 17:52
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Re: a/c compressor not engaging
By: JohnL455 on Wed, 14 August 2019 17:54
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Re: a/c compressor not engaging
By: Deb on Wed, 14 August 2019 18:27
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Re: a/c compressor not engaging
By: JohnL455 on Thu, 15 August 2019 11:28
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