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Does any one happen to know where the T-stat switch
for the chassis A/C on a 1991 SP36 is located. My
system would love to work but the compressor will not
kick in unless jumped. Then it works,so i supect the
T-Stat switch fails to tell the compressor "ITS HOT
MAN, START COOLING....". All other stuff works, so no
C/B popped etc. Randy? Jeff? Mike? George?
Juergen in PA
1991 WLSP36


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Juergen, In my 90 SP it is located on the drivers side in the upper
dash overhead compartment. But just a thought. If your system has a
low pressure switch?? That could be the problem too.
Tom 90 SP36

--- In WanderlodgeForum@yahoogroups.com, john duke
wrote:
> Does any one happen to know where the T-stat switch
> for the chassis A/C on a 1991 SP36 is located. My
> system would love to work but the compressor will not
> kick in unless jumped. Then it works,so i supect the
> T-Stat switch fails to tell the compressor "ITS HOT
> MAN, START COOLING....". All other stuff works, so no
> C/B popped etc. Randy? Jeff? Mike? George?
> Juergen in PA
> 1991 WLSP36
>
>
> __________________________________________________
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> Tired of spam? Yahoo! Mail has the best spam protection around
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I don't know the specifics of the coach, but mobile air
thermostats are located at the evaporator (the actual cooling
coils for the AC). There will be a copper tube
that leads to it.
If it's the pressure switch, that's usually under
the hood and has a 2 wire switch to it. You can unplug
the switch and put a jumper wire connecting the
2 connectors together. Then the compressor should
come on.
It will look like an oil pressure sending unit screwed
into the AC line with 2 wires coming off it.
Hope this helps.
George Witt
81 FC 35
Lincoln, Nebraska


--- In WanderlodgeForum@yahoogroups.com, "Tom Seitz" wrote:
> Juergen, In my 90 SP it is located on the drivers side in the upper
> dash overhead compartment. But just a thought. If your system has a
> low pressure switch?? That could be the problem too.
> Tom 90 SP36
>
> --- In WanderlodgeForum@yahoogroups.com, john duke
> wrote:
> > Does any one happen to know where the T-stat switch
> > for the chassis A/C on a 1991 SP36 is located. My
> > system would love to work but the compressor will not
> > kick in unless jumped. Then it works,so i supect the
> > T-Stat switch fails to tell the compressor "ITS HOT
> > MAN, START COOLING....". All other stuff works, so no
> > C/B popped etc. Randy? Jeff? Mike? George?
> > Juergen in PA
> > 1991 WLSP36
> >
> >
> > __________________________________________________
> > Do You Yahoo!?
> > Tired of spam? Yahoo! Mail has the best spam protection around
> > http://mail.yahoo.com

Hi John,

Don't know about your coach, but I found out on my coach that I had to
turn on the blower before the compressor will come on. There is also
a compressor switch on the heat/AC control panel. Once I found those
two, it works great.

George

john duke wrote:

> Does any one happen to know where the T-stat switch
> for the chassis A/C on a 1991 SP36 is located. My
> system would love to work but the compressor will not
> kick in unless jumped. Then it works,so i supect the
> T-Stat switch fails to tell the compressor "ITS HOT
> MAN, START COOLING....". All other stuff works, so no
> C/B popped etc. Randy? Jeff? Mike? George?
> Juergen in PA
> 1991 WLSP36
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
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>

Before an after a 100 mile drive I checked to see if the compressor
was clutching-up and it wasn't. Does anyone know what kind of
circuit breakers or fuses are in the compressor control path? a
schematic would be very useful. I have a decent set of tools with
me so any suggestions for diagnosing are greatly appreciated.

Thanks again,
David Brady
'02 LXi, Smokey, Va

Gregory OConnor wrote:

>David, does the engine fan clutch up? did you try this with the
>engine running and warm and the interior thermostat set lower than
>interior temp? some systems will not clutch up during startup of the
>vehicle. I have a 92 cummings M14 in a truck that stores codes for
>the ac functions. Having the computer read reveals volumns.
>Greg--- In Wanderlodge_all@yahoogroups.com, David Brady
>wrote:
>
>
>>Folks,
>>
>>My chassis air conditioning isn't working. I haven't
>>found any blown fuses or circuit breakers. The control
>>switch wiring looks okay. If I turn on the key and toggle
>>the dash ac switch I don't see any voltage changes on the
>>wires going to the compressor (in the engine compartment),
>>nor do I hear any relay chatter. The compressor doesn't
>>seem to be engaging. Any ideas on what I can check?
>>
>>Thanks,
>>David Brady
>>'02 LXi, Smokey, Va
>>
>>
>>--
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>3/1/2006
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Checked by AVG Free Edition.
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David:

If your talking about the Coach aA/C compressor, it should be fuses 5 and 6
that control that.

Ralph

At 03:05 PM 3/4/2006 -0500, you wrote:
>Before an after a 100 mile drive I checked to see if the compressor
>was clutching-up and it wasn't. Does anyone know what kind of
>circuit breakers or fuses are in the compressor control path? a
>schematic would be very useful. I have a decent set of tools with
>me so any suggestions for diagnosing are greatly appreciated.
>
>Thanks again,
>David Brady
>'02 LXi, Smokey, Va
>
>Gregory OConnor wrote:
>
> >David, does the engine fan clutch up? did you try this with the
> >engine running and warm and the interior thermostat set lower than
> >interior temp? some systems will not clutch up during startup of the
> >vehicle. I have a 92 cummings M14 in a truck that stores codes for
> >the ac functions. Having the computer read reveals volumns.
> >Greg--- In Wanderlodge_all@yahoogroups.com, David Brady
> >wrote:
> >
> >
> >>Folks,
> >>
> >>My chassis air conditioning isn't working. I haven't
> >>found any blown fuses or circuit breakers. The control
> >>switch wiring looks okay. If I turn on the key and toggle
> >>the dash ac switch I don't see any voltage changes on the
> >>wires going to the compressor (in the engine compartment),
> >>nor do I hear any relay chatter. The compressor doesn't
> >>seem to be engaging. Any ideas on what I can check?
> >>
> >>Thanks,
> >>David Brady
> >>'02 LXi, Smokey, Va
> >>
> >>
> >>--
> >>No virus found in this outgoing message.
> >>Checked by AVG Free Edition.
> >>Version: 7.1.375 / Virus Database: 268.1.1/272 - Release Date:
> >>
> >>
> >3/1/2006
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >Yahoo! Groups Links
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>--
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>Checked by AVG Free Edition.
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Safe travels,

Ralph and Charolette Fullenwider
Ralph's RV Solutions, Duncan, Oklahoma
http://home.swbell.net/rlf47/index.htm

David,

Had a similar problem with our '95 bird. At the compressor, you should
find a wire that goes to the clutch. Mine had a connector that I could
unplug, If it is a butt connector, just cut the wire. Two checks.
First; with the key in the on position and the A/C controls set for
cooling, check the wire end that comes from the harness for 12 volts.
If you are not getting 12 volts, you probably have a blown fuse or
other similar problem. Second; using an ohm meter, check the wire
going to the clutch for continuity. The clutch is internally grounded
so you should get a very low resistance reading. If it shows infinite
resistance, the clutch coil is open and needs to be replaced. A
confirming test is to use a jumper wire and connect 12 volts to the
wire to the clutch. If the clutch is ok, it will pull in. That will
give you a starting point.

George Lowry
'06 Alpine Apex - Formerly '95 Wbda 4203
Spearfish, SD Now in Gila Bend, AZ

David Brady wrote:

> Before an after a 100 mile drive I checked to see if the compressor
> was clutching-up and it wasn't. Does anyone know what kind of
> circuit breakers or fuses are in the compressor control path? a
> schematic would be very useful. I have a decent set of tools with
> me so any suggestions for diagnosing are greatly appreciated.
>
> Thanks again,
> David Brady
> '02 LXi, Smokey, Va
>
> Gregory OConnor wrote:
>
>
>>David, does the engine fan clutch up? did you try this with the
>>engine running and warm and the interior thermostat set lower than
>>interior temp? some systems will not clutch up during startup of the
>>vehicle. I have a 92 cummings M14 in a truck that stores codes for
>>the ac functions. Having the computer read reveals volumns.
>>Greg--- In Wanderlodge_all@yahoogroups.com, David Brady
>>wrote:
>>
>>
>>
>>>Folks,
>>>
>>>My chassis air conditioning isn't working. I haven't
>>>found any blown fuses or circuit breakers. The control
>>>switch wiring looks okay. If I turn on the key and toggle
>>>the dash ac switch I don't see any voltage changes on the
>>>wires going to the compressor (in the engine compartment),
>>>nor do I hear any relay chatter. The compressor doesn't
>>>seem to be engaging. Any ideas on what I can check?
>>>
>>>Thanks,
>>>David Brady
>>>'02 LXi, Smokey, Va
>>>
>>>
>>>--
>>>No virus found in this outgoing message.
>>>Checked by AVG Free Edition.
>>>Version: 7.1.375 / Virus Database: 268.1.1/272 - Release Date:
>>>
>>>
>>
>>3/1/2006
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>Yahoo! Groups Links
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>

Thanks Ralph, at which load center are those fuses located.
I have a load center at the rear of the bus, one above the
pilot area, and one at the copilot's footwell. There's
also a fuse/relay box on the outside of the bus below the
pilot's side window.

Thanks,
David Brady
'02 LXi, Smokey, Va

Ralph L. Fullenwider wrote:

>David:
>
>If your talking about the Coach aA/C compressor, it should be fuses 5 and 6
>that control that.
>
>Ralph
>
>At 03:05 PM 3/4/2006 -0500, you wrote:
>
>
>>Before an after a 100 mile drive I checked to see if the compressor
>>was clutching-up and it wasn't. Does anyone know what kind of
>>circuit breakers or fuses are in the compressor control path? a
>>schematic would be very useful. I have a decent set of tools with
>>me so any suggestions for diagnosing are greatly appreciated.
>>
>>Thanks again,
>>David Brady
>>'02 LXi, Smokey, Va
>>
>>Gregory OConnor wrote:
>>
>>
>>
>>>David, does the engine fan clutch up? did you try this with the
>>>engine running and warm and the interior thermostat set lower than
>>>interior temp? some systems will not clutch up during startup of the
>>>vehicle. I have a 92 cummings M14 in a truck that stores codes for
>>>the ac functions. Having the computer read reveals volumns.
>>>Greg--- In Wanderlodge_all@yahoogroups.com, David Brady
>>>wrote:
>>>
>>>
>>>
>>>
>>>>Folks,
>>>>
>>>>My chassis air conditioning isn't working. I haven't
>>>>found any blown fuses or circuit breakers. The control
>>>>switch wiring looks okay. If I turn on the key and toggle
>>>>the dash ac switch I don't see any voltage changes on the
>>>>wires going to the compressor (in the engine compartment),
>>>>nor do I hear any relay chatter. The compressor doesn't
>>>>seem to be engaging. Any ideas on what I can check?
>>>>
>>>>Thanks,
>>>>David Brady
>>>>'02 LXi, Smokey, Va
>>>>
>>>>
>>>>--
>>>>No virus found in this outgoing message.
>>>>Checked by AVG Free Edition.
>>>>Version: 7.1.375 / Virus Database: 268.1.1/272 - Release Date:
>>>>
>>>>
>>>>
>>>>
>>>3/1/2006
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>Yahoo! Groups Links
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>--
>>No virus found in this outgoing message.
>>Checked by AVG Free Edition.
>>Version: 7.1.375 / Virus Database: 268.1.2/274 - Release Date: 3/3/2006
>>
>>
>>
>>
>>Yahoo! Groups Links
>>
>>
>>
>>
>>
>>
>
>Safe travels,
>
>Ralph and Charolette Fullenwider
>Ralph's RV Solutions, Duncan, Oklahoma
>http://home.swbell.net/rlf47/index.htm
>
>
>
>
>Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
>



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No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.375 / Virus Database: 268.1.2/274 - Release Date: 3/3/2006

Thanks for the suggestion Randy, but no go on the wiggle.
I'll be visition Josam's in Orlando on Monday, maybe they
can have a look at it.

David
'02 LXi, Smokey, Va

randydupree wrote:

>if you wiggle the wires on the low pressure switch on the compressor does it
>make it work? i have to do this alot on the GM cars we have. with the ac
>turned on,engine running,wiggle the wires on the comp. and on the hoses..
>randy
>----- Original Message -----
>From: "David Brady"
>To:
>Sent: Saturday, March 04, 2006 2:56 PM
>Subject: Re: [Wanderlodge_all] Re: Chassis A/C
>
>
>
>
>>Before an after a 100 mile drive I checked to see if the compressor
>>was clutching-up and it wasn't. Does anyone know what kind of
>>circuit breakers or fuses are in the compressor control path? a
>>schematic would be very useful. I have a decent set of tools with
>>me so any suggestions for diagnosing are greatly appreciated.
>>
>>Thanks again,
>>David Brady
>>'02 LXi, Smokey, Va
>>
>>Gregory OConnor wrote:
>>
>>
>>
>>>David, does the engine fan clutch up? did you try this with the
>>>engine running and warm and the interior thermostat set lower than
>>>interior temp? some systems will not clutch up during startup of the
>>>vehicle. I have a 92 cummings M14 in a truck that stores codes for
>>>the ac functions. Having the computer read reveals volumns.
>>>Greg--- In Wanderlodge_all@yahoogroups.com, David Brady
>>>wrote:
>>>
>>>
>>>
>>>
>>>>Folks,
>>>>
>>>>My chassis air conditioning isn't working. I haven't
>>>>found any blown fuses or circuit breakers. The control
>>>>switch wiring looks okay. If I turn on the key and toggle
>>>>the dash ac switch I don't see any voltage changes on the
>>>>wires going to the compressor (in the engine compartment),
>>>>nor do I hear any relay chatter. The compressor doesn't
>>>>seem to be engaging. Any ideas on what I can check?
>>>>
>>>>Thanks,
>>>>David Brady
>>>>'02 LXi, Smokey, Va
>>>>
>>>>
>>>>--
>>>>No virus found in this outgoing message.
>>>>Checked by AVG Free Edition.
>>>>Version: 7.1.375 / Virus Database: 268.1.1/272 - Release Date:
>>>>
>>>>
>>>>
>>>>
>>>3/1/2006
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>Yahoo! Groups Links
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>--
>>No virus found in this outgoing message.
>>Checked by AVG Free Edition.
>>Version: 7.1.375 / Virus Database: 268.1.2/274 - Release Date: 3/3/2006
>>
>>
>>
>>
>>Yahoo! Groups Links
>>
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>>
>>
>>
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>Yahoo! Groups Links
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--
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.375 / Virus Database: 268.1.2/274 - Release Date: 3/3/2006

Dave:

It should be in the outside electrical compartment.

Ralph

At 07:21 PM 3/4/2006 -0500, you wrote:
>Thanks Ralph, at which load center are those fuses located.
>I have a load center at the rear of the bus, one above the
>pilot area, and one at the copilot's footwell. There's
>also a fuse/relay box on the outside of the bus below the
>pilot's side window.
>
>Thanks,
>David Brady
>'02 LXi, Smokey, Va
>
>Ralph L. Fullenwider wrote:
>
> >David:
> >
> >If your talking about the Coach aA/C compressor, it should be fuses 5 and 6
> >that control that.
> >
> >Ralph
> >
> >At 03:05 PM 3/4/2006 -0500, you wrote:
> >
> >
> >>Before an after a 100 mile drive I checked to see if the compressor
> >>was clutching-up and it wasn't. Does anyone know what kind of
> >>circuit breakers or fuses are in the compressor control path? a
> >>schematic would be very useful. I have a decent set of tools with
> >>me so any suggestions for diagnosing are greatly appreciated.
> >>
> >>Thanks again,
> >>David Brady
> >>'02 LXi, Smokey, Va
> >>
> >>Gregory OConnor wrote:
> >>
> >>
> >>
> >>>David, does the engine fan clutch up? did you try this with the
> >>>engine running and warm and the interior thermostat set lower than
> >>>interior temp? some systems will not clutch up during startup of the
> >>>vehicle. I have a 92 cummings M14 in a truck that stores codes for
> >>>the ac functions. Having the computer read reveals volumns.
> >>>Greg--- In Wanderlodge_all@yahoogroups.com, David Brady
> >>>wrote:
> >>>
> >>>
> >>>
> >>>
> >>>>Folks,
> >>>>
> >>>>My chassis air conditioning isn't working. I haven't
> >>>>found any blown fuses or circuit breakers. The control
> >>>>switch wiring looks okay. If I turn on the key and toggle
> >>>>the dash ac switch I don't see any voltage changes on the
> >>>>wires going to the compressor (in the engine compartment),
> >>>>nor do I hear any relay chatter. The compressor doesn't
> >>>>seem to be engaging. Any ideas on what I can check?
> >>>>
> >>>>Thanks,
> >>>>David Brady
> >>>>'02 LXi, Smokey, Va
> >>>>
> >>>>
> >>>>--
> >>>>No virus found in this outgoing message.
> >>>>Checked by AVG Free Edition.
> >>>>Version: 7.1.375 / Virus Database: 268.1.1/272 - Release Date:
> >>>>
> >>>>
> >>>>
> >>>>
> >>>3/1/2006
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>Yahoo! Groups Links
> >>>
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> >>>
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> >>>
> >>>
> >>
> >>
> >>--
> >>No virus found in this outgoing message.
> >>Checked by AVG Free Edition.
> >>Version: 7.1.375 / Virus Database: 268.1.2/274 - Release Date: 3/3/2006
> >>
> >>
> >>
> >>
> >>Yahoo! Groups Links
> >>
> >>
> >>
> >>
> >>
> >>
> >
> >Safe travels,
> >
> >Ralph and Charolette Fullenwider
> >Ralph's RV Solutions, Duncan, Oklahoma
> >http://home.swbell.net/rlf47/index.htm
> >
> >
> >
> >
> >Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
>
>--
>No virus found in this outgoing message.
>Checked by AVG Free Edition.
>Version: 7.1.375 / Virus Database: 268.1.2/274 - Release Date: 3/3/2006
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>
>
>
>Yahoo! Groups Links
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>
>
>

Safe travels,

Ralph and Charolette Fullenwider
Ralph's RV Solutions, Duncan, Oklahoma
http://home.swbell.net/rlf47/index.htm