Home » Public Forums » GMCnet » Dash Blower inop
| Dash Blower inop [message #368506] |
Wed, 19 January 2022 18:55  |
Tom Katzenberger
Messages: 399
Registered: June 2019
Location: Kingsville, MD
Karma: 4
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Good evening guys and gals,
My dash environmental controls are inop. I am going to start trouble shooting tomorrow night. I got Ken H's memo on the blower ground and Emery's memo on the relays. Is there any thing else that is a normal failure item in the HVAC system? I'm looking to address the common items in an attempt to save time. The coach is a 1977, 23', Birchaven, 455 C.I.D.
Thanks in advance,
Tom K.
Tom & Oki Katzenberger,
Kingsville, Maryland,
1977 23' Birchaven, 455 C.I.D., Micro Level, Howell EBL-EFI Spark Control, Macerator, York Air Compressor, 6 Wheel Disc, Quadra Bag, Onan W/Bovee Ignition
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| [GMCnet] Re: Dash Blower inop [message #368507 is a reply to message #368506] |
Wed, 19 January 2022 19:03  |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Keep in mind that the Blower case needs to be grounded, as the blower case
is fiberglass .
Also the 5 pin relay need to have the clips bent to form a solid contact,
On Wed, Jan 19, 2022 at 4:56 PM wrote:
> Good evening guys and gals,
>
> My dash environmental controls are inop. I am going to start trouble
> shooting tomorrow night. I got Ken H's memo on the blower ground and
> Emery's memo
> on the relays. Is there any thing else that is a normal failure item in
> the HVAC system? I'm looking to address the common items in an attempt to
> save
> time. The coach is a 1977, 23', Birchaven, 455 C.I.D.
>
> Thanks in advance,
> Tom K.
> --
> Tom & Oki Katzenberger,
> Kingsville, Maryland,
> 1977 23' Birchaven, 455 C.I.D., Micro Level, Howell EBL-EFI Spark Control,
> Macerator, York Air Compressor, 6 Wheel Disc, Quadra Bag, Onan W/Bovee
> Ignition
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.gmcrvparts.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: Dash Blower inop [message #368508 is a reply to message #368506] |
Wed, 19 January 2022 19:59 |
Tom Katzenberger
Messages: 399
Registered: June 2019
Location: Kingsville, MD
Karma: 4
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Senior Member |
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Thanks Jim,
I didn't even think about the case being fiberglass.
Tom K.
Tom & Oki Katzenberger,
Kingsville, Maryland,
1977 23' Birchaven, 455 C.I.D., Micro Level, Howell EBL-EFI Spark Control, Macerator, York Air Compressor, 6 Wheel Disc, Quadra Bag, Onan W/Bovee Ignition
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| [GMCnet] Re: Dash Blower inop [message #368509 is a reply to message #368508] |
Wed, 19 January 2022 22:18 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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There are lot of small thing I find out as I worked on them my younger
years.
On Wed, Jan 19, 2022 at 5:59 PM wrote:
> Thanks Jim,
>
> I didn't even think about the case being fiberglass.
>
> Tom K.
> --
> Tom & Oki Katzenberger,
> Kingsville, Maryland,
> 1977 23' Birchaven, 455 C.I.D., Micro Level, Howell EBL-EFI Spark Control,
> Macerator, York Air Compressor, 6 Wheel Disc, Quadra Bag, Onan W/Bovee
> Ignition
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.gmcrvparts.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: Dash Blower inop [message #368544 is a reply to message #368506] |
Sun, 23 January 2022 18:32 |
Bullitthead
Messages: 1411
Registered: November 2013
Karma: 5
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Senior Member |
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Almost every time I turn that blower on I have to just touch the fuse in the fuse block to make it work. System is only good for defrost anyway, too many leaks overcome the blower output.
Terry Kelpien
ASE Master Technician
73 Glacier 260
Smithfield, Va.
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| [GMCnet] Re: Dash Blower inop [message #368546 is a reply to message #368506] |
Sun, 23 January 2022 20:16 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Poor connection
On Sun, Jan 23, 2022 at 6:16 PM Jim Kanomata wrote:
>
>
> On Sun, Jan 23, 2022 at 4:32 PM Terry via Gmclist
> wrote:
>
>> Almost every time I turn that blower on I have to just touch the fuse in
>> the fuse block to make it work. System is only good for defrost anyway, too
>> many leaks overcome the blower output.
>> --
>> Terry Kelpien
>>
>> ASE Master Technician
>>
>> 73 Glacier 260
>>
>> Smithfield, Va.
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>>
>
>
> --
> Jim Kanomata ASE
> Applied/GMC, Newark,CA
> jimk@appliedairfilters.com
> http://www.gmcrvparts.com
> 1-800-752-7502
>
--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.gmcrvparts.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| [GMCnet] Re: Dash Blower inop [message #368547 is a reply to message #368544] |
Sun, 23 January 2022 20:16 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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On Sun, Jan 23, 2022 at 4:32 PM Terry via Gmclist
wrote:
> Almost every time I turn that blower on I have to just touch the fuse in
> the fuse block to make it work. System is only good for defrost anyway, too
> many leaks overcome the blower output.
> --
> Terry Kelpien
>
> ASE Master Technician
>
> 73 Glacier 260
>
> Smithfield, Va.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.gmcrvparts.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Re: Dash Blower inop [message #368548 is a reply to message #368547] |
Sun, 23 January 2022 21:11 |
Bullitthead
Messages: 1411
Registered: November 2013
Karma: 5
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Senior Member |
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Yeah, I know,I already cleaned those holders with a wire brush until they looked shiny, but upon reapplication of power and then time (week later) it was doing it again. Other fuses are ok now, so maybe it is the firewall connection at the back of the fusebox.
Terry Kelpien
ASE Master Technician
73 Glacier 260
Smithfield, Va.
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| [GMCnet] Re: Dash Blower inop [message #368549 is a reply to message #368548] |
Sun, 23 January 2022 22:02 |
stu@97381.com, Emery
Messages: 232
Registered: June 2020
Karma: 2
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Senior Member |
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Try using a little bit of dielectric grease on the ends of the fuse. Don’t use silicone grease. It’s not the same. This should prevent surface corrosion and likely eliminate your problem.
Emery Stora
77 Kingsley
Frederick CO
> On Jan 23, 2022, at 8:12 PM, Terry via Gmclist wrote:
>
> Yeah, I know,I already cleaned those holders with a wire brush until they looked shiny, but upon reapplication of power and then time (week later) it
> was doing it again. Other fuses are ok now, so maybe it is the firewall connection at the back of the fusebox.
> --
> Terry Kelpien
>
> ASE Master Technician
>
> 73 Glacier 260
>
> Smithfield, Va.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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| Re: [GMCnet] Re: Dash Blower inop [message #368553 is a reply to message #368549] |
Mon, 24 January 2022 15:50 |
Bullitthead
Messages: 1411
Registered: November 2013
Karma: 5
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Senior Member |
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Emery,
One of the P.O. s had done that before but maybe got to it too late or used the wrong grease. Terminals were spotted dark green with arrested corrosion. I cleaned 'em (all the fuses giving me trouble) with several agents and compressed air and finished with brass wire brush. Scotchbrite the fuse ends and all was/is well except the blower fuse started acting up again. I have that grease you refer to and use it on horn rings (remember them?)whenever I take an old column apart. Even though it works when I use it this way, the name doesn't make sense to me for that job, since it is called dielectric, which means it is an insulator, doesn't conduct until a certain voltage breakdown. I'll be using it on there next time I go for that job. IIRC last time I noticed the upper left side terminal was loose in the box so it may still be a 50 year-old crimp behind the bakelite.
Terry Kelpien
ASE Master Technician
73 Glacier 260
Smithfield, Va.
[Updated on: Mon, 24 January 2022 19:25] Report message to a moderator |
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