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PT & WB (Twin Axle Pusher Unique Issues) If you have a unique issue with your PT or WB model coach and it can't be answered in one of the other forums here, then this is where you can list it....list your PT Parts here too.

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  #1  
Old 09-11-2016
Movin' On Movin' On is offline
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Default 8V92 Thermostat Fan Diagram

The hydraulic fan on my 8V92 runs at the high speed all the time. Does anyone have a wiring diagram showing how the control circuit works and where the temperature sensor controls are located? The fan keep the engine temperature down around 170 degrees and this problem needs to be fixed.
Thanks for any help anyone may have.
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'94 WB40
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  #2  
Old 09-11-2016
dennis hight dennis hight is offline
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Is your dash ac on?
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  #3  
Old 09-11-2016
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gcyeaw gcyeaw is offline
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I have a single speed fan, so may be different than yours.

12 volts is applied to the fan motor solenoid to disengage the fan.


The dash switch is on the ground side. It opens the ground to engage the fan. The temp switch on the 6V is by the street side thermostat housing. 12 volts is supplied by the ignition to one side, the other side is connected to the fan solenoid. The switch is closed when cold so supplies 12 volts to stop the fan. When it reaches the temperature set it opens removing the power to allow the fan to engage.
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Old 09-11-2016
Movin' On Movin' On is offline
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Dennis,

It may be on. I'll check it tomorrow when I go to the RV storage building. I am assuming that the fan is turned on when the A/C is on.

Gardner,

If the A/C switch is not the trouble I'll check the temp sensors on the thermostat housing to see if they are open when cold with the ignition on.

Thanks everyone for the help.
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  #5  
Old 09-11-2016
konehd konehd is online now
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The fan wiring is on the DDEC II wiring diagram, at least on my '93.

See if this helps...
http://www.wanderlodgeownersgroup.co...4Ddec_Mstr.pdf
or this
http://www.wanderlodgeownersgroup.co...2520MastrA.pdf


HTH, Joe
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  #6  
Old 09-12-2016
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Here is a pic of the thermal switch on my 6V. Wiring is temporary and ugly. The switch was weak so I put a relay in the circuit to take the load. Now I have a new switch, much better.
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  #7  
Old 09-12-2016
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Dieselbird01 Dieselbird01 is offline
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Quote:
Originally Posted by konehd View Post
The fan wiring is on the DDEC II wiring diagram, at least on my '93.

See if this helps...
http://www.wanderlodgeownersgroup.co...4Ddec_Mstr.pdf
or this
http://www.wanderlodgeownersgroup.co...2520MastrA.pdf


HTH, Joe
Neither of those links work for me?

Maybe try these instead:

http://www.wanderlodgeownersgroup.co...4Ddec_Mstr.pdf

http://www.wanderlodgeownersgroup.co...I%20MastrA.pdf
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1991 40' WLWB-WTB
Body Number F095567
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1991 40' WB ...From 2008 - Present
1984 ½ PT-36 .From 2000 - 2008
1973 FC-31 .....From 1991 - 2001
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  #8  
Old 09-29-2016
Movin' On Movin' On is offline
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Default 8V92 Thermostatic Fan Diagram

In the effort to find the reason why the fan runs at the high speed all the time I have verified the A/C Fan Control Relay is O.K. and the Fan Alarmstat is also O.K. I need to find the Fan Override Relay. The wire for the Fan Override Relay goes over the engine toward the front of the coach in a wire bundle. Is the relay in the area accessed with the access port in the bedroom? I have not opened that access yet.

There are two temperature sensors beside the Alarmstat. What are these two sensors? One may be the Fan Override Temperature Switch.

Does anyone know where the Fan Override Relay is located on a '94 WB40?

Thanks,
Dave
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  #9  
Old 09-30-2016
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Dieselbird01 Dieselbird01 is offline
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Quote:
Originally Posted by Movin' On View Post
In the effort to find the reason why the fan runs at the high speed all the time I have verified the A/C Fan Control Relay is O.K. and the Fan Alarmstat is also O.K. I need to find the Fan Override Relay. The wire for the Fan Override Relay goes over the engine toward the front of the coach in a wire bundle. Is the relay in the area accessed with the access port in the bedroom? I have not opened that access yet.

There are two temperature sensors beside the Alarmstat. What are these two sensors? One may be the Fan Override Temperature Switch.

Does anyone know where the Fan Override Relay is located on a '94 WB40?

Thanks,
Dave
Hi Dave,

I think the Fan Override Relay on a 94 WB is in the front/rear ignition box in the engine compartment.
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John Wyatt
Titusville, Florida
1991 40' WLWB-WTB
Body Number F095567
My Location: http://www.bbirdmaps.com/user1.cfm?user=4

1991 40' WB ...From 2008 - Present
1984 ½ PT-36 .From 2000 - 2008
1973 FC-31 .....From 1991 - 2001
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  #10  
Old 09-30-2016
Movin' On Movin' On is offline
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Thanks John. I'll look fo it in the morning. I never would have guessed to look there.

Thanks,
Dave
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